Tallow in Skincare — A 5,000-Year History

Tallow — rendered animal fat — has been on human skin for at least five thousand years. It appears in the Egyptian Ebers Papyrus (c. 1550 BCE) as a base for ointments. It shows up in Greek athlete ritual, Roman bathhouse oils, medieval European apothecary kits, and the supply chests of every army that ever marched through a winter. It only fell out of skincare in the 20th century, when petroleum byproducts became cheaper than animals — and now it is coming back, helped along by a 2024 peer-reviewed scoping review in Cureus that took the question seriously: does tallow actually work on skin, and if so, why? The answer is yes, and the why is biochemistry, not nostalgia.

Ebers Papyrus, c. 1550 BCE — the first written record

The earliest written prescription for tallow on skin lives in the Ebers Papyrus, an Egyptian medical scroll dated to roughly 1550 BCE and now held by the University of Leipzig. It contains over 800 prescriptions, several of which call for the rendered fat of cattle (sometimes mixed with honey, sometimes with milk) applied as a salve for burns, dry skin, and what we would now call eczematous patches.

The Edwin Smith Surgical Papyrus, dated slightly earlier, makes similar use of tallow as the carrier for wound dressings. Egyptian apothecaries understood, empirically, that animal fat held active ingredients against skin and helped them stay where they were applied. They had no fatty-acid biochemistry — but they had centuries of observation, and the prescriptions that worked got copied forward.

What is striking, reading the translations now, is that the formulations are not exotic. Tallow plus honey is the same combination still used in dozens of Pretty Farm Girl bars today. The pairing has been stable across five millennia for a simple reason: it works.

Greek and Roman bathhouse — tallow as athletic anointing oil

By the classical Greek period, athletes anointed themselves with rendered fat before training and competition. The fat was scraped off afterward with a curved bronze tool called a strigil, taking sweat, dust, and dead skin with it. This was, functionally, the first cleansing oil. The fat softened the skin, lifted dirt, and protected against the friction of sand-floor wrestling pits.

Romans inherited the practice and industrialized it. Public baths stocked tallow-and-olive-oil mixtures for both genders. Cato the Elder and Pliny the Elder both record the use of suet (a specific form of tallow rendered from beef kidney fat) in skincare and in the protection of soldiers' feet on long marches. The Roman cosmetic chest contained more tallow-based salves than plant-oil ones.

The pattern across the ancient Mediterranean is consistent: where there were cattle, there was tallow on skin. The fat was abundant, it kept without refrigeration, and it carried fragrance and herbs without separating.

Medieval Europe — the apothecary cabinet

Medieval European apothecaries built their salves on a base of either beeswax, lard, or tallow — most often tallow because cattle were everywhere and the fat was the cheapest part of the slaughter. Monastic infirmaries and village healers both worked from the same baseline: render fat clean, melt it with herbs, cool it, jar it, label it.

The 12th-century Trotula texts (anonymous, attributed to women's medical school of Salerno) prescribe tallow-based ointments for postpartum skin and for chapped hands of working women. Hildegard of Bingen's medical writings include similar formulations.

The continuity matters: by the time European settlers reached the Americas, every farm woman in their tradition knew how to render tallow and turn it into a salve. That knowledge would later become the foundation of the Colonial American homestead apothecary — which we cover in a separate article in this journal.

19th-century industrial soap — when tallow nearly disappeared

The Industrial Revolution created the modern soap factory, and early factory soap was almost entirely tallow-based. Lever Brothers (the future Unilever) and Procter & Gamble both built their original empires on tallow-soap formulas — Sunlight Soap, Ivory Soap. As long as the soap was a brick of tallow with lye saponified through it, the underlying ingredient was the same fat humans had used for five thousand years.

What changed was the cream. In the late 1800s, petroleum jelly (Vaseline, patented 1872 by Robert Chesebrough) entered the market as a cheap byproduct of refining kerosene. It was odorless, it never spoiled, and it was nearly free. Within a generation, water-and-petroleum emulsion creams replaced tallow salves on the average woman's vanity. Tallow stayed in the bar of soap, but it left the moisturizer category.

By the 1950s, mass-market skincare had fully migrated to mineral-oil and synthetic-emulsion bases. The tallow lineage survived in soap, in old farm households, and almost nowhere else. It would take roughly seventy years for it to come back.

Why skin recognizes tallow — the fatty-acid match

The 21st-century scientific case for tallow rests on a single biochemical fact: the fatty-acid profile of bovine tallow is unusually close to the fatty-acid profile of human sebum. Both are dominated by palmitic acid (a saturated fat with 16 carbons), oleic acid (a monounsaturated fat with 18 carbons), and stearic acid (a saturated fat with 18 carbons), in roughly the same proportions.

This matters because the outermost layer of human skin (the stratum corneum) is held together by a lipid mortar — a fatty-acid sandwich called the lamellar lipid layer. When that lipid layer is depleted (by harsh cleansers, by cold weather, by the simple passage of time), the skin gets dry and reactive. Refilling it requires lipids that the skin will accept and integrate — and tallow is among the closest matches available.

A 2016 NIH-indexed review of stratum corneum lipid function (PMC4856930) catalogues the lipid composition required for healthy barrier function. The match between tallow and sebum is not exact — sebum has a slightly higher proportion of unique branched fatty acids — but it is closer than any common plant oil.

Vitamins A, D, E, K2 — pre-dissolved in the fat

Tallow from grass-fed cattle is also a carrier of fat-soluble vitamins. Vitamin A (in retinoid form, not as a synthetic ester), vitamin D, vitamin E (as alpha-tocopherol), and vitamin K2 are all present in measurable amounts in the rendered fat. A 2015 Nutrition Journal study (PMID 26353941) measured these in pasture-raised vs grain-finished cattle and found the grass-fed fat consistently higher across the board.

These vitamins are fat-soluble — which means they are bioavailable through the skin barrier without needing emulsifiers or carriers. They are already dissolved in the matrix the skin recognizes. This is why a properly rendered grass-fed tallow balm does not need synthetic vitamin additives to deliver vitamin A; the vitamin A is already in the fat.

It is also why the source of the tallow matters. Tallow from grain-finished feedlot cattle has a flatter vitamin profile than tallow from pasture-raised animals. Pretty Farm Girl uses grass-fed tallow specifically — not a marketing flourish, a biochemistry decision.

Cureus 2024 — the scoping review that put tallow back on the map

In June 2024, the journal Cureus published a peer-reviewed scoping review titled "Tallow in Skin Care: A Scoping Review of Its Biocompatibility, Composition, and Clinical Implications" (PMC11193910 / PubMed PMID 38910727). It is the first comprehensive academic synthesis of the tallow-skincare evidence to be indexed in mainstream medical databases.

The review summarizes the fatty-acid profile match described above, catalogues the vitamin content, examines the limited but suggestive clinical data on barrier repair, and addresses the regulatory and cosmetic-formulation context. It is careful — it does not claim tallow is a treatment for any medical condition. But it does treat the ancestral-skincare claim as scientifically respectable rather than fringe.

The publication of the review was a watershed for the tallow-skincare category. It is now possible to point to indexed peer-reviewed literature when discussing why tallow works on skin — not just to historical practice or anecdote. Pretty Farm Girl was already six years into its tallow line when the review was published; the review caught up to the practice.

Render to soap — the chemistry that ties this all together

Cold-process soap is what happens when rendered tallow meets sodium hydroxide (lye) dissolved in water or milk. The hydroxide breaks the triglyceride bonds in the fat and rearranges them into soap molecules and glycerin. The reaction is called saponification, and it is one of the oldest deliberate chemical reactions humans perform.

What makes a tallow soap different from a tallow balm is that the tallow has been chemically converted to soap — it no longer functions as a moisturizer in the bar. But the saponification reaction also produces glycerin, which stays in the bar (in cold-process; commercial hot-process strips it out and sells it separately) and pulls moisture into skin. So a tallow soap cleanses with the soap molecules and softens with the glycerin. That dual action is why a properly cured tallow bar feels different from a synthetic-detergent body wash.

The cure time matters because saponification continues for weeks after pour. A bar that is used too soon is harsher; a bar cured 28+ days has fully reacted and is gentler. Pretty Farm Girl logs the cure date on every batch — 28 days minimum, often longer for richer formulations.

Pretty Farm Girl in this lineage

When Jen Keel started rendering tallow on a Florida farm in 2017, she was not innovating. She was rejoining a lineage that runs from Egyptian apothecaries through Greek bathhouses through medieval European farms through 19th-century soap factories — a lineage that almost died in the 20th century and is now being rebuilt by farms like hers and by reviews like the 2024 Cureus paper.

Every Pretty Farm Girl bar is grass-fed beef tallow, fresh on-farm goat milk, and a short list of plant ingredients, cold-processed and cured at least 28 days. The face creams (like Blue Beauty Cream) carry the tallow forward into a leave-on format with blue tansy and other actives. The lip butter is essentially a tallow-and-honey balm — the same formulation a medieval apothecary would recognize.

There is no cleverness here. There is just five thousand years of skin observation, finally backed by indexed peer-reviewed literature, applied with care.

Cosmetic claims, not medical ones

The FDA draws a sharp line between cosmetic claims (this product cleanses, softens, smooths) and drug claims (this product treats, cures, or prevents a condition). Pretty Farm Girl operates entirely on the cosmetic side. Tallow's effect on eczema, psoriasis, and other diagnosed conditions is consistently anecdotal — many users report dramatic improvement, and the mechanism is biochemically plausible, but the controlled clinical trials needed to make a medical claim do not exist at scale.

If you have a diagnosed skin condition, talk to your dermatologist before changing your routine. Use Pretty Farm Girl products as cosmetics. Do not use them in place of prescribed treatments without medical guidance.

Where to start

For first-time tallow users, the lowest-stakes entry point is a single bar — the Sweet Almond + Honey Tallow + Goat Milk Bar or the Soft + Gentle Buttermilk Bar (the latter for sensitive or reactive skin). The bars deliver the full tallow + goat milk experience for under fifteen dollars and let you patch-test before committing to a leave-on product.

If you want a leave-on tallow product, the Blue Beauty Cream is Pretty Farm Girl's bestselling face cream — tallow base, blue tansy active. The Fragrance-Free Tallow + Honey Lip Butter is the simplest expression of the lineage: tallow, beeswax, on-farm honey, nothing else.

Read Jen's own letter on the brand page if you want the founder's version of why this farm exists at all.