What is tallow, and why put beef fat on your skin?
The honest version, including the parts most tallow brands leave out and the claim the whole category keeps repeating that is not true.
Vanessa Corey, Founder & Formulator · Updated September 2026
We know how it sounds. Beef fat, on your face. It is the reaction we get most and it is a fair one. Underneath a lot of confident nonsense there is a straight answer, so here it is, including where the internet has got carried away.
People expect me to oversell tallow. I would rather say exactly what it does and exactly where the claims run ahead of the evidence. The truth is good enough.
Vanessa Corey, Founder & FormulatorWhat tallow actually is
Tallow is rendered beef fat: gently heated, then filtered until it is clean, stable and close to odourless. Solid at room temperature, liquid the moment it touches skin.
It was used in soap and skin salves for centuries and fell out of fashion in the twentieth century, when cheap plant oils and petroleum-derived ingredients took over. It is back largely because people started reading ingredient lists.
What is in it
Composition depends on the breed of cattle, what they ate, and which part of the animal the fat came from — so anyone quoting one precise number is guessing. Published figures come as ranges.2
| Fatty acid | Typical range | What it does on skin |
|---|---|---|
| Oleic acid | 36–46% | Absorbs easily, softens, carries other ingredients in |
| Palmitic acid | 24–32% | Helps hold moisture in |
| Stearic acid | 11–19% | Softens, and gives a balm its body |
It also carries the fat-soluble vitamins A, D, E and K.
Why your skin recognises it
Sebum — the oil your skin makes for itself — is dominated by oleic, palmitic and stearic acids. The same three that dominate tallow.
That is the entire mechanism. A fat your skin recognises gets absorbed and used. A fat it does not recognise tends to sit on the surface as a seal. Most moisturisers put a lid on your skin. Tallow gets used by it.
Where that claim goes too far
You will read all over the internet that tallow is "nearly identical to human sebum". That is not true, and we do not repeat it.
Sebum is not only fatty acids. It also contains squalene and wax esters. Squalene in particular sits in human sebum at levels found nowhere else in the body, and tallow contains none of it. Tallow has no wax esters either.3
So the honest version is this: tallow matches sebum in the fatty acid part, and that part matters a great deal for how well it absorbs. It is not a copy of sebum. The full comparison is in the fatty acid breakdown.
Why grass-fed matters
Fat composition reflects diet. A commissioned laboratory comparison found the grass-fed sample contained roughly 22% more oleic acid and 65% less natural trans fat than grain-fed.1
Oleic acid is the fraction doing most of the absorption work, so more of it is straightforwardly better in a skincare fat. That is the whole sourcing argument and it rests on a measurement. It is also why tallow brands that stay quiet about sourcing are, in my view, hoping you will not ask. There is more in why the sourcing matters more than the ingredient.
Will it clog my pores?
This is the fair question, and the honest answer is that nobody can give you a number.
We do not publish a comedogenicity rating for tallow, and you should be sceptical of anyone who does. Those 0-to-5 pore-clogging ratings come from tests done on rabbit ears in the 1970s and 80s. Rabbit ear skin reacts far more readily than human skin, published numbers disagree with each other, and tallow does not appear in the original tables at all. A rating would look official and mean very little.
What is true: tallow is high in oleic acid, and a minority of acne-prone people do not get on well with oleic-rich products. Most people are completely fine. Patch test on your jawline for a few days and see.
Why we built a self tanner on it
A self tan lives in the outermost layer of your skin and fades as that layer sheds.4 So the condition of that layer decides both how well the colour develops and how evenly it goes.
Most self tanners are built on alcohol, which strips that exact layer while the tan is developing. We used tallow instead, so the skin is being conditioned during the eight hours that matter. The mechanism is set out in does self tanner dry out skin.
One thing to be clear about while we are here: tallow is not sun protection. It is a moisturising fat, nothing more. Wear sunscreen.
Grass-fed tallow, carrying a tan
Grass-fed tallow base. No drying alcohols, no synthetic fragrance. Pick the depth that matches where your skin starts.
Not sure which is yours? Take the 30-second shade quiz and we'll tell you.
Tallow, answered
Is tallow good for your skin?
For most people, particularly dry, rough or barrier-stressed skin, yes. Its main fatty acids match those in your skin's own oil, so it absorbs rather than sitting on top. It carries vitamins A, D, E and K, and contains none of the plant allergens found in many botanical oils.
Does tallow smell like beef?
Properly rendered and filtered tallow has almost no smell. If a tallow product smells beefy, it was not rendered well.
Is tallow the same as human sebum?
No. It matches sebum's main fatty acids — oleic, palmitic and stearic — but has no squalene and no wax esters. A partial match, in the part that matters most for absorption.
Does tallow clog pores?
No authoritative rating exists, so we publish none. Tallow is high in oleic acid, which a minority of acne-prone people do not tolerate well. Patch test on your jawline.
Why grass-fed rather than ordinary tallow?
A commissioned comparison found grass-fed contained around 22% more oleic acid and 65% less natural trans fat than grain-fed.1 Oleic acid absorbs best and does the most for dry skin.
Is tallow vegan?
No. It is an animal fat, so it is not for anyone avoiding animal-derived ingredients. There is no version of this that gets around that.
Does tallow protect against the sun?
No. It is a moisturising fat and nothing more. Wear sunscreen, and treat any product implying otherwise with suspicion.
Three shades, one formula
Grass-fed tallow base. No drying alcohols, no synthetic fragrance. Pick the depth that matches where your skin starts.
Not sure which is yours? Take the 30-second shade quiz and we'll tell you.
References and notes
1. Weston A. Price Foundation. "Fatty Acid Analysis of Grass-fed and Grain-fed Beef Tallow." Commissioned comparative laboratory analysis.
2. Ranges compiled from published beef tallow composition analyses including Pongpaew et al., "Fatty Acid Composition of Pon Yang Kham Beef Tallow" (ICoMST), and USDA FoodData Central.
3. Human sebum composition: Ottaviani M, Camera E, Picardo M. Lipid mediators in acne. Mediators of Inflammation. 2010; and Downing DT et al., 1969.
4. Turner J, O'Loughlin DA, Green P, McDonald TO, Hamill KJ. In search of the perfect tan. Journal of Cosmetic Dermatology. 2023;22:79–88.