Wet Render vs. Dry Render Tallow: Is One Actually Better?

Spend enough time in the tallow world and eventually you will encounter a very confident statement about rendering.

“Wet-rendered tallow is cleaner.”

“Dry-rendered tallow preserves more nutrients.”

“Salt pulls out the impurities.”

“Water destroys the vitamins.”

“Dry rendering leaves a beef smell.”

“Wet rendering causes mold.”

Depending on who is selling the tallow, you may hear completely opposite versions of the same argument.

So which one is actually true?

The frustrating answer is that pieces of truth exist on both sides — but rendering quality cannot be reduced to “wet good” or “dry good.”

There are legitimate differences between wet and dry rendering. Water can assist with purification. Excessive heat can damage fat. Residual moisture can create storage problems. Repeated processing can alter a fat. Salt can help phase separation.

But many of the dramatic claims made online go several steps beyond what the evidence actually demonstrates.

So instead of defending one rendering method because it happens to be the method we use, we wanted to look at the chemistry.

What happens to tallow during rendering?

What happens to its fatty acids?

What about vitamins?

Does wet rendering really cause mold?

Does dry rendering trap impurities?

Does salt actually “purify” tallow?

And perhaps most importantly:

Is one rendering method objectively superior?

The answer is considerably more interesting than a yes or no.

First: What Are We Actually Doing When We Render Tallow?

Raw beef fat isn’t simply a block of pure triglycerides.

Adipose tissue contains fat along with water, connective tissue, cellular material, proteins, blood residues and other biological components.

Rendering uses heat to release the fat from that tissue and separate it from the material we do not want in the finished tallow.

The American Oil Chemists’ Society describes three fundamental objectives of rendering:

1. Removing water to create a stable product.
2. Separating fat from protein and other solids.
3. Reducing microbial contamination through processing.

Both wet and dry rendering can accomplish these objectives. (AOCS⁠) https://www.aocs.org/resource/animal-fats/

And that point deserves emphasis.

Both methods are legitimate rendering methods.

Tallow itself is recognized as being produced through either dry or wet rendering. (PubChem⁠)  https://pubchem.ncbi.nlm.nih.gov/compound/Tallow

The argument isn’t really whether wet rendering “works” or dry rendering “works.”

Both work.

The question is what happens under the particular conditions being used.

What Is Dry Rendering?

In dry rendering, no additional water is deliberately added.

The chopped or ground fat is heated until the fat melts out of the surrounding tissue. The liquid fat is then separated from the remaining solids and filtered.

At the small-batch level, that might mean a slow cooker, kettle or stainless-steel vessel.

At the industrial level, the process can be considerably more sophisticated.

But chemically, the principle is similar:

heat + fatty tissue → melted fat + separated solids + evaporated native moisture

One major advantage is obvious.

You aren’t deliberately introducing another large water phase that must later be removed.

But that does not automatically make dry rendering gentle.

A dry rendering process conducted at excessive temperature can brown proteins, develop stronger cooked aromas and increase lipid oxidation.

Research examining animal fats has repeatedly demonstrated that rendering temperature matters. In one study of rendered horse fat, fat rendered at 110°C showed greater oxidative deterioration than fat processed at 70°C under vacuum. (PubMed Central (PMC)⁠) https://pmc.ncbi.nlm.nih.gov/articles/PMC6992833/

Higher temperatures can also alter volatile compounds.

A recent beef-tallow study found aldehydes to be major components of tallow’s volatile profile — exactly the class of molecules commonly associated with fat oxidation and characteristic fat aromas. (ScienceDirect⁠) https://www.sciencedirect.com/science/article/pii/S0889157526002486

So:

Dry rendering isn’t automatically low-temperature rendering.

A carefully controlled dry render may be extremely gentle.

A poorly controlled dry render can cook the fat unnecessarily hard.

Those are not equivalent products simply because neither contained added water.

What Is Wet Rendering?

Wet rendering introduces a water phase while the fatty tissue is heated.

Because melted fat and water separate, the fat can eventually be recovered from the aqueous phase while many water-soluble materials remain behind.

Industrial wet rendering is often performed below 100°C.

The American Oil Chemists’ Society describes wet rendering of higher-value and heat-sensitive fats at approximately 70–90°C, specifically noting the use of lower temperatures to protect nutritional quality. (AOCS⁠) https://www.aocs.org/resource/animal-fats/

Commercial equipment manufacturer GEA similarly describes wet rendering as a lower-temperature process and notes that it can produce high-quality fats and functional proteins. (GEA⁠) https://www.gea.com/en/food/oils-fats/animal-fats-and-proteins/fat-rendering/?utm_source=chatgpt.com

That’s important because one common internet argument goes something like this:

“Dry rendering protects the nutrients while wet rendering boils them away.”

That simply isn’t a technically adequate description of either process.

You could dry-render fat aggressively at a high temperature.

You could wet-render another batch gently at 75°C.

Which one experienced harsher thermal treatment?

Obviously, the dry-rendered batch.

Water alone tells us almost nothing about thermal damage without knowing the temperature and duration of processing.

The Confusing Part: “Wet Rendering” Often Means Two Different Things

This is where many online comparisons become messy.

Industrial wet rendering generally means recovering fat from tissue using a water/steam-based process.

In the handmade tallow community, however, “wet rendering” may mean something different:

The fat is rendered first, then melted again with water — sometimes repeatedly — as a purification or deodorization process.

Those are not necessarily equivalent processes.

For example:

Batch A

Fresh suet → gently wet-rendered once at 80°C.

Batch B

Fresh suet → dry-rendered → cooled → melted with water and salt → cooled → repeated three more times.

Both may eventually be called “wet-rendered tallow.”

But Batch B has experienced dramatically more cumulative processing.

That becomes particularly important when people attempt to compare fatty-acid degradation.

What About the Famous Dry-vs.-Wet Tallow Lab Test?

A frequently cited online experiment compared tallow that was dry-rendered with tallow subsequently subjected to multiple water-and-salt purification cycles.

The results showed differences in several fatty acids, including reductions reported in some unsaturated fatty acids after extensive wet processing. (Kai Tallow, LLC⁠) https://www.kaitallow.com/blogs/articles/we-lab-tested-dry-vs-wet-rendered-tallow-here-are-the-results

The experiment is interesting.

But there is a major experimental limitation that should be acknowledged.

The samples did not simply compare:

dry heat vs. identical heat + water.

According to the company’s own methodology, the original fat was first dry-rendered. Some of that material was then subjected to additional wet-processing cycles.

One treatment reportedly received approximately 15 additional hours of wet processing. (Kai Tallow, LLC⁠) https://www.kaitallow.com/blogs/articles/we-lab-tested-dry-vs-wet-rendered-tallow-here-are-the-results

Therefore several variables changed simultaneously:

• water exposure
• salt exposure
• total heating time
• reheating cycles
• cooling cycles
• handling
• potential oxygen exposure

That means the experiment can reasonably demonstrate:

Extensive repeated wet purification can produce measurable changes compared with the original rendered fat.

It cannot cleanly establish:

Water itself caused those changes.

That’s an important scientific distinction.

A properly controlled experiment would ideally start with identical raw fat divided into groups, then control temperature, processing duration, oxygen exposure, particle size and every other relevant variable except the presence or absence of water.

Without that control, blaming every observed difference specifically on water overstates what the experiment proves.

What Does Peer-Reviewed Research Show?

Fortunately, direct dry-vs.-wet comparisons have also been performed.

A 2024 study evaluated tallow produced through wet and dry rendering and examined acid value, peroxide value, thiobarbituric acid values, fatty-acid profiles and oxidative stability.

Both rendering methods produced acceptable results for several quality measures.

During extended storage, oxidation increased in both wet- and dry-rendered tallow. Rendering method did not emerge as some magical protection against long-term oxidation. (Online Journal Unja⁠) 

Another comparison of beef tallow rendered by dry and wet methods at approximately 90–100°C found differences in acid values and some fatty-acid measurements, but peroxide values were not significantly different between the methods and both products satisfied the applicable physicochemical quality criteria examined by the researchers.

One difference is worth highlighting rather than glossing over: wet-rendered tallow had a significantly higher acid value in this particular experiment — approximately 1.72 versus 0.67 mg KOH/g for dry-rendered tallow. A higher acid value indicates a greater concentration of free fatty acids and is consistent with greater hydrolytic change.

That is legitimate evidence in favor of dry rendering under those particular experimental conditions.

But the rest of the results matter too. Peroxide values — a measure associated with primary lipid oxidation — were not significantly different between the methods, and the researchers reported that tallow produced through both methods met the physicochemical quality criteria examined.

So this study doesn’t tell us that wet rendering and dry rendering are identical.

It tells us something much more useful:

Some quality measurements can differ between rendering methods without making one finished tallow categorically “good” and the other categorically “bad.” (Universitas Gadjah Mada⁠) https://ir.lib.ugm.ac.id/id/eprint/27574/?utm_source=chatgpt.com

In other words:

Wet rendering can change tallow.

Dry rendering can change tallow.

Heat changes tallow.

Time changes tallow.

Oxygen changes tallow.

Storage changes tallow.

Reducing all of that chemistry to “water ruins tallow” isn’t supported by the evidence.

Does Water Cause Hydrolysis?

Technically, water participates in the hydrolysis of triglycerides.

Triglycerides can break into glycerol and free fatty acids.

So the statement:

“Water can contribute to hydrolysis.”

is chemically legitimate.

But context matters enormously.

Temperature, processing time, catalysts, enzymes, acidity, pressure and moisture all influence the reaction.

For perspective, research deliberately hydrolyzing oils with water uses extreme conditions such as approximately 260–280°C under elevated pressure to achieve rapid near-complete conversion. (ACS Publications⁠) https://pubs.acs.org/iecred/article/36/3/932/1510369/Hydrolysis-of-Vegetable-Oils-in-Sub-and

A pot of tallow being gently washed with warm water is obviously not operating under those conditions.

That does not mean zero hydrolysis occurs.

It means claims that ordinary wet rendering somehow causes catastrophic triglyceride destruction need considerably more evidence than the simple statement:

“There was water present.”

Does Wet Rendering Destroy Tallow’s Fat-Soluble Vitamins?

This is probably the claim that deserves the most scrutiny.

You’ll commonly see something resembling:

“Wet rendering washes away vitamins A, D, E and K.”

There is an immediate chemistry problem with that statement.

They’re called fat-soluble vitamins because they preferentially associate with fats rather than dissolving readily into water.

That doesn’t make them indestructible.

Heat, oxygen, light, refining and prolonged processing can degrade or reduce various micronutrients and antioxidants.

For example, a 2025 study examining a considerably more involved industrial refining process found a 41.1% reduction in tocopherol antioxidants during refining. (ScienceDirect⁠) https://www.sciencedirect.com/science/article/abs/pii/S0308814625007423

That is absolutely relevant.

But it demonstrates that processing can reduce tocopherols.

It does not demonstrate that simply touching water removes 41% of tallow’s vitamin E.

Those are different claims.

More importantly, there is surprisingly little direct evidence quantifying vitamins A, D, E and K in otherwise identical tallow before and after controlled wet versus dry rendering. 

There is considerably more published research measuring fatty-acid profiles, oxidation and physicochemical properties than there is research directly measuring those individual vitamins under controlled wet-versus-dry rendering conditions. Fatty-acid results should not be presented as though they were vitamin assays.

So when someone gives a very specific statement such as:

“Wet-rendered tallow has fewer vitamins.”

the appropriate question is:

Which vitamins? How much less? Under what temperature? For how long? How many purification cycles? And where is the assay?

If those answers don’t exist, we’re dealing with a hypothesis — not an established fact.

And About the Famous “Tallow Is Packed With Vitamins A, D, E and K” Claim…

This deserves its own little detour.

Beef tissues can certainly contain fat-soluble micronutrients, and cattle diet can influence some of them.

Research has repeatedly found higher α-tocopherol — vitamin E — and carotenoids in pasture-finished beef compared with grain-finished beef. (PubMed Central (PMC)⁠) https://pmc.ncbi.nlm.nih.gov/articles/PMC2846864/

A large 2026 North American analysis similarly reported higher vitamin E and β-carotene in pasture-finished beef, while other vitamins showed much smaller or inconsistent differences. Vitamin D levels were low in the beef studied, and vitamins A and K did not differ significantly between finishing systems. (ScienceDirect⁠) https://www.sciencedirect.com/science/article/pii/S0308814626028244

But studies of beef muscle or adipose tissue should not automatically be converted into claims about the concentration of every vitamin in a finished jar of rendered cosmetic tallow.

Rendering, tissue source, cattle diet, breed, storage and refinement all matter.

So we think saying:

“Tallow inherently contains meaningful quantities of vitamins A, D, E and K”

without actually testing the tallow is much stronger than the available evidence warrants.

And arguing that one rendering method preserves those vitamins better without measuring them adds another assumption on top of the first one.

Now Let’s Talk About Mold

Does Wet Rendering Cause Mold?

This claim needs especially careful wording.

Mold doesn’t grow simply because water touched something at some point during manufacturing. What matters in the finished product is available water, commonly discussed in terms of water activity.

Properly rendered fat can have extremely low water activity. In one peer-reviewed study examining rendered animal fats, beef tallow contained approximately 0.11% moisture and had a measured water activity of approximately 0.34.

So:

Wet-rendered tallow does not inherently equal moldy tallow.

However, wet rendering introduces a practical manufacturing challenge:

You added water. Now you have to get it back out.

If somebody washes tallow with water, lifts the hardened fat cake from the vessel and packages it while droplets, pockets or an aqueous layer remain trapped in or beneath the fat, they haven’t adequately finished the process.

That can create localized environments very different from properly dehydrated tallow.

This is why professional rendering systems don’t simply add water and call the job finished. The American Oil Chemists’ Society identifies water removal to create a stable product as one of the fundamental objectives of rendering itself.

Therefore the more accurate statement is:

Improper moisture removal can create quality and microbial concerns. Wet rendering simply gives the processor more water that must subsequently be separated and removed.

That’s very different from saying:

Wet-rendered tallow grows mold.

And dry rendering isn’t magically exempt from moisture concerns either.

Raw animal tissue already contains water.

Dry rendering must remove that native moisture too.

No added water does not mean no water ever existed.

Does Dry Rendering Eliminate the Moisture Problem?

It certainly makes the problem easier.

Because no large external water phase is intentionally added, there is less water that must later be removed.

That is a meaningful practical advantage — especially for small producers without industrial centrifuges, vacuum dryers or moisture-testing equipment.

But raw fatty tissue already contains moisture.

Dry rendering still has to evaporate that water.

Stopping the process too early can therefore leave moisture behind as well.

“Dry rendered” does not automatically mean “zero moisture.”

It simply avoids deliberately adding more.

Why Does Wet-Rendered Tallow Often Smell Less “Beefy”?

This is one place where wet purification has a very practical advantage.

Odor isn’t caused by “tallow” as one single molecule.

Beef-fat aroma comes from numerous volatile compounds and oxidation products. Modern analysis of beef tallow identifies complex volatile profiles containing large numbers of compounds, with aldehydes playing a particularly important role. (ScienceDirect⁠) https://www.sciencedirect.com/science/article/abs/pii/S0308814625007423

Some odor-producing compounds or precursor materials associate more readily with the aqueous phase than others.

Repeatedly melting fat with fresh water can therefore remove:

• residual proteins
• blood-derived material
• water-soluble compounds
• some odor precursors
• suspended tissue debris

The contaminated water is discarded after each separation.

That is why repeated wet purification frequently creates extremely white, mild-smelling tallow.

It isn’t magic.

You’re effectively washing the fat.

But Does Dry Rendering Necessarily Smell Like Beef?

No.

This is another overgeneralization.

A strong cooked-meat smell can result from:

• meat left attached to the fat
• blood contamination
• old or oxidized raw material
• excessive rendering temperature
• browned proteins
• prolonged exposure to air
• unsuitable source fat
• poor filtration

Fresh, clean suet rendered gently can produce remarkably mild tallow.

Conversely, dirty raw material repeatedly washed with water may become visually white and relatively deodorized — but that doesn’t somehow retroactively make the starting fat higher quality.

Rendering method cannot compensate for every upstream problem.

Raw Material May Matter More Than People Realize

This may be the biggest thing lost in the wet-versus-dry debate.

Not all beef fat is chemically identical.

A 2026 study examining tallow from 13 cattle breeds found substantial differences in yield, melting characteristics, lipid composition and volatile compounds between breeds. (ScienceDirect⁠) https://www.sciencedirect.com/science/article/pii/S0889157526002486

Diet also influences antioxidant and fatty-acid composition.

Pasture-finishing has repeatedly been associated with increased α-tocopherol and certain carotenoids compared with conventional grain finishing. (PubMed Central (PMC)⁠) https://pmc.ncbi.nlm.nih.gov/articles/PMC2846864/

Then consider anatomical source.

Kidney suet isn’t identical to every piece of subcutaneous trim from an animal.

Then consider freshness.

Then oxygen exposure.

Then cold storage before rendering.

Then filtration.

Then final storage.

Suddenly the argument:

“Mine is better because mine is dry rendered.”

starts sounding a little incomplete.

Rendering method is one variable among many.

What Does Salt Actually Do?

This may be our favorite tallow myth because salt sometimes gets credited with almost supernatural abilities.

You’ll hear:

“Salt pulls toxins out of the tallow.”

“Salt purifies the fat.”

“Salt neutralizes impurities.”

Chemically, that’s not a very useful explanation.

Salt is highly soluble in water and essentially insoluble in fat.

When salt is added during wet processing, it increases the ionic strength of the water phase.

That can influence proteins, emulsions and phase separation.

In food processing, changing electrolyte concentration is a recognized technique for helping break fat-water emulsions. Industry guidance on low-temperature tallow processing specifically notes that increasing salt concentration can help destabilize an emulsion so the fat and aqueous phases separate more efficiently. (Solenis⁠) https://www.solenis.com/en/resources/blog/separating-water-from-fat-in-low-temperature-rendering-operations/

So salt can absolutely be useful.

But saying it “draws impurities out of tallow” is an oversimplified folk explanation for a considerably more ordinary piece of physical chemistry.

Does Salt Stay in the Tallow?

Ideally, very little should.

Sodium chloride prefers the aqueous phase.

When the fat and water separate properly, most salt remains with the discarded water rather than migrating into the lipid phase.

Industrial separation guidance specifically notes that salt used for emulsion breaking is rejected into the aqueous phase during separation rather than remaining in the finished tallow. (Solenis⁠) https://www.solenis.com/en/resources/blog/separating-water-from-fat-in-low-temperature-rendering-operations/

Could poorly separated handmade tallow retain salty water droplets?

Of course.

But once again that’s primarily a water-separation problem, not evidence that salt itself belongs in rendered tallow.

Does Salt Preserve Tallow?

Not in the way people sometimes imagine.

Salt preserves certain foods when present at sufficiently high concentrations in their water phase, where it reduces water activity and inhibits microorganisms.

Properly rendered tallow should contain almost no aqueous phase in the first place.

The goal isn’t:

preserve the leftover water with salt.

The goal is:

remove the water.

Salt therefore shouldn’t be viewed as a substitute for proper dehydration, separation, sanitation or storage.

Does Salt Prevent Rancidity?

Not necessarily.

Rancidity is primarily a lipid-oxidation problem.

Oxygen, light, temperature, unsaturation, trace metals, antioxidant concentration and storage conditions all influence oxidation.

Salt isn’t a magic antioxidant.

In fact, depending on the food system and contaminants involved, salts can interact with oxidation chemistry in complicated ways.

So adding salt should primarily be viewed as a processing aid during wet purification, not a shelf-life preservative for finished tallow.

What About Color?

Wet-purified tallow frequently appears extremely white.

Dry-rendered tallow may range from white through cream to yellow.

And here’s where aesthetics can accidentally become marketing science.

White does not automatically mean purer.

Yellow does not automatically mean nutrient-rich.

Color can reflect:

• carotenoids
• cattle diet
• breed
• fat location
• oxidation
• suspended impurities
• heat history
• filtration
• purification

Research comparing rendering methods has found measurable color differences between wet- and dry-rendered tallow. (Universitas Gadjah Mada⁠) https://ir.lib.ugm.ac.id/id/eprint/27574/?utm_source=chatgpt.com

Likewise, β-carotene is known to contribute yellow coloration to fat from pasture-fed cattle. (PubMed⁠) https://pubmed.ncbi.nlm.nih.gov/22063103/?utm_source=chatgpt.com

Therefore making tallow extremely white may be desirable aesthetically.

But color alone cannot tell you whether the fat is nutritionally or chemically “better.”

What About Shelf Life?

Neither rendering method grants immortality.

Tallow is relatively oxidation-resistant because a large portion of its fatty acids are saturated or monounsaturated.

But it still oxidizes.

The 180-day storage study comparing wet and dry rendering found increasing oxidation over time in both groups. Neither rendering method prevented oxidative deterioration during prolonged storage. (Online Journal Unja⁠) https://online-journal.unja.ac.id/ifstj/article/view/32528?utm_source=chatgpt.com

Temperature matters.

Oxygen matters.

Light matters.

Raw-material quality matters.

Antioxidant concentration matters.

Headspace matters.

Container choice matters.

How many times you repeatedly melt the same batch matters.

So:

“Dry tallow lasts longer.”

might be true under one processing comparison.

And:

“Wet-rendered tallow lasts just as long.”

could be true under another.

Without moisture measurements, peroxide values, storage conditions and controlled testing, blanket shelf-life statements are mostly speculation.

So Which Method Produces the Better Tallow?

Here’s the unsatisfying scientific answer:

Neither method automatically wins.

A well-executed dry render can produce exceptional tallow.

A well-executed wet render can produce exceptional tallow.

A badly executed version of either can produce poor tallow.

Dry Rendering Has Genuine Advantages

It avoids introducing large quantities of additional water.

It typically involves fewer processing steps.

It can reduce the risk of accidentally packaging residual water.

When performed gently, it limits unnecessary repeated reheating.

It can retain more of the fat’s natural aroma and character.

And from a small-batch manufacturing perspective, it can simply be more efficient.

Dry Rendering Also Has Genuine Disadvantages

Direct heating increases the possibility of scorching.

Meat and protein residues can brown.

Poor temperature control can create stronger cooked aromas.

Less water washing means certain water-soluble residues and odor precursors aren’t removed through an aqueous phase.

Wet Rendering Has Genuine Advantages

Water can assist separation.

The aqueous phase can carry away water-soluble material.

Repeated washing can produce very mild-smelling tallow.

It can create extremely pale, visually uniform fat.

Water can also moderate processing temperature and reduce localized scorching when used correctly.

Industrial wet rendering is specifically used in some applications where low-temperature recovery of high-quality fat is desirable. (AOCS⁠)https://www.aocs.org/resource/animal-fats/

Wet Rendering Also Has Genuine Disadvantages

There is more water to remove.

Poor separation can leave residual moisture.

Multiple purification cycles mean additional time and processing.

Repeated heating can contribute to oxidation and degradation.

It is more labor-intensive.

And extremely aggressive purification may remove compounds you actually wanted to retain along with those you didn’t.

The Variable Nobody Wants to Put on the Label: Process Control

Imagine these two producers.

Producer A

Uses beautiful kidney suet from freshly processed cattle.

The fat is trimmed carefully.

It is kept cold.

It is rendered once at controlled low temperature.

The tallow is filtered thoroughly.

Moisture is driven off completely.

It is protected from excessive air, heat and light.

Producer B

Uses older mixed trim containing meat and blood.

It sits warm before processing.

It’s cooked aggressively.

Then washed three times because it still smells.

Then heated another several hours.

Then stored in a half-full translucent container in a warm room.

Which one made better tallow?

The words wet rendered or dry rendered won’t answer that question.

Perhaps We Are Asking the Wrong Question

Instead of asking:

“Is wet-rendered or dry-rendered tallow better?”

Maybe the better questions are:

Where did the fat come from?

How fresh was it?

What part of the animal was used?

At what temperature was it rendered?

How long was it heated?

How many times was it reheated?

Was the finished tallow adequately dehydrated?

How thoroughly was it filtered?

Was it protected from oxygen and light afterward?

Those questions tell us much more about processing quality.

Our Verdict

Wet versus dry rendering is a real technical distinction.

It just isn’t the quality hierarchy the internet sometimes turns it into.

Water isn’t automatically destructive.

Dry heat isn’t automatically gentle.

Salt doesn’t magically extract “toxins.”

Wet rendering doesn’t automatically cause mold.

Dry rendering doesn’t automatically preserve every vitamin.

White tallow isn’t automatically purer.

Yellow tallow isn’t automatically more nutritious.

Odorless tallow isn’t automatically superior.

And smelling slightly like its animal source doesn’t automatically mean tallow was rendered poorly.

Processing temperature, duration, raw-material quality, oxygen exposure, purification, moisture removal and storage all interact.

There is also one particularly important gap in the current debate:

Despite confident claims about one rendering method “preserving vitamins,” we found far more evidence comparing fatty acids, oxidation and physicochemical properties than controlled research measuring vitamins in identical beef fat subjected solely to wet versus dry rendering.

That means there’s still room for legitimate research.

And that’s okay.

Saying “we don’t know yet” when the research hasn’t answered something isn’t a weakness.

It’s considerably more responsible than filling that gap with marketing.

If we’re going to claim that one rendering method preserves vitamins A, D, E and K better than another, the strongest evidence would be surprisingly straightforward: take the same starting fat, divide it into controlled groups, keep temperature, time and other variables as comparable as possible, render it by each method, and directly measure those vitamins before and after processing. Until we have that kind of evidence, certainty about dramatic vitamin superiority deserves more caution than it usually receives.

At Naturally Lathered Tallow Co., we believe traditional ingredients deserve the same scrutiny as modern ones.

Tallow doesn’t need mythology to be interesting.

The chemistry is interesting enough on its own.