Is Beef Tallow Comedogenic? What the Evidence Actually Shows
The comedogenic rating for beef tallow is commonly listed as 1–2, but where does that number come from? We trace it to the source and give you an honest answer.
If you've looked up whether tallow will break you out, you've probably found a number between 0 and 5 next to it. That number is the comedogenic rating, and it's everywhere. Paste "beef tallow comedogenic" into any search engine and you'll get dozens of ingredient lists, all citing the same range: 1 to 2. What almost nobody mentions is where that number came from, or whether it still means anything for your skin.
A 2025 cross-sectional study analyzed 200 social media posts about tallow skincare across YouTube, Instagram, and TikTok. Of those, 82% recommended tallow for skin, yet only 16% of YouTube videos cited any scientific source (Almatroud et al., Journal of Cosmetic Dermatology, 2025). That's the current information environment. This post tries to do better.
We trace the scale to its origin, explain what tallow's rating actually tells you, and give honest guidance by skin type. No guarantees in either direction. Just the evidence.
TL;DR: The comedogenic scale rates ingredients 0–5 for pore-clogging risk. Beef tallow scores 1–2, placing it in the low range. The catch: the scale originates from Kligman and Mills' 1972 rabbit-ear tests (Arch Dermatol, PMID 4264346), a method that modern dermatologists consider unreliable for predicting human breakouts. The rating is a rough signal, not a verdict.
What Is the Comedogenic Scale and Where Did It Come From?
Dermatologist Albert Kligman and colleague Otto Mills created the comedogenic scale in 1972 (Kligman AM, Mills OH Jr., Archives of Dermatology, 1972, PMID 4264346). Their method involved applying cosmetic ingredients to the ear canals of rabbits, then scoring how much each ingredient caused follicular plugging on a 0 to 5 scale. Zero meant no plugging. Five meant severe. The paper titled the method "acne cosmetica," and the scale it produced has been circulating in ingredient lists ever since.
The problem is that rabbit ear canals don't behave like human facial skin. The tissue is more sensitive to follicular irritation than human skin, and the test was never standardized across labs. A 1982 paper in the Journal of the American Academy of Dermatology by Frank SB (PMID 6461674) concluded the rabbit ear model showed "serious limitations" and no reliable correlation to actual human experience. That critique is now over forty years old. The scale is older still.
So why does the scale still appear on every ingredient comparison table online? Partly inertia. Partly because no standardized replacement has taken hold. The most recent comprehensive review, Starzyk et al. in JAAD Reviews (September 2025), found that comedogenicity ratings still in circulation largely trace back to those 1970s and 1980s rabbit studies and called explicitly for standardized human-based testing on final formulations. The "noncomedogenic" label remains unregulated in both the US and Canada. Between FY 2019 and 2023, the FDA issued zero warning letters citing noncomedogenic mislabeling (FDA enforcement data, 2024). Brands can print it on packaging without any clinical validation.
The comedogenic scale originates from Kligman and Mills' 1972 rabbit-ear model, a method a 1982 JAAD paper (Frank SB, PMID 6461674) found showed "serious limitations" with no correlation to human outcomes. A 2025 JAAD Reviews paper by Starzyk et al. confirmed that most ratings still in circulation trace back to this unvalidated era of testing.
A 2006 review in JAAD by Draelos and DiNardo (PMID 16488305) added another important finding: finished cosmetic products using comedogenic ingredients are not necessarily comedogenic. The ingredient rating and the product behaviour are two different things. Does that mean ratings are useless? Not entirely. But it does mean treating them as hard facts is a mistake.
Where Does Tallow's Rating of 1–2 Actually Come From?
Beef tallow appears in ingredient comedogenicity lists with a rating of 1 to 2. This range traces back to the same 1970s and 1980s era of rabbit ear testing. There is no independently published modern human-skin study specifically examining beef tallow's comedogenicity. The rating exists because someone tested raw rendered fat on rabbit ears decades ago, and the number has been copied forward ever since.
Here's how tallow compares to other common skincare ingredients, all rated by the same method:
| Ingredient | Reported Rating (0–5) | Source Era |
|---|---|---|
| Mineral oil | 0 | 1970s–80s rabbit model |
| Argan oil | 0–1 | 1970s–80s rabbit model |
| Shea butter | 0–2 | 1970s–80s rabbit model |
| Beef tallow | 1–2 | 1970s–80s rabbit model |
| Jojoba oil | 2 | 1970s–80s rabbit model |
| Coconut oil | 4 | 1970s–80s rabbit model |
Tallow sits in the lower half of the scale, alongside shea butter and well below coconut oil. That's genuinely reassuring compared to rating-4 ingredients. But the "Source Era" column is the one almost no comparison table online bothers to include — and it should be, because it tells you that every number in that table comes from the same 50-year-old rabbit model. Tallow's 1 to 2 is no more or less validated than mineral oil's 0 or coconut oil's 4. They're all equally old, and equally unreviewed by modern methods.
Does a Low Rating Mean Tallow Won't Break You Out?
Not automatically, no. The scale rates raw ingredients in isolation, not finished products on real human skin. Draelos and DiNardo's 2006 JAAD paper (PMID 16488305) found that products containing higher-rated ingredients don't always cause breakouts, and products with lower-rated ingredients sometimes do. A rating of 1 or 2 is a starting point for risk assessment. It isn't a promise.
Three variables the scale doesn't capture:
Concentration. A trace amount of a rating-4 ingredient may have no effect on your skin. A thick occlusive layer of a rating-1 ingredient can still trap debris on congested skin. The rabbit ear tests applied undiluted raw material. That's not how most people apply a moisturizer.
Skin type. Someone with dry skin applying a thin layer of tallow is in a completely different situation from someone with oily, acne-prone skin applying it heavily before bed. The ingredient is the same. The outcome isn't.
Formulation. The other ingredients in a product change how any single ingredient behaves. An emulsifier or astringent paired with tallow creates a different skin experience than tallow alone.
According to a 2006 review in the Journal of the American Academy of Dermatology, finished cosmetic products using comedogenic ingredients are not necessarily comedogenic (Draelos and DiNardo, PMID 16488305). The inverse also holds: low-rated ingredients can still cause breakouts when applied in excessive amounts or to compromised skin.
So what's the scale actually useful for? It's a rough directional signal. An ingredient with a rating of 4 or 5 is worth approaching with more caution than one rated 0 or 1. But it isn't a guarantee in either direction.
Does Cosmetic-Grade Tallow Behave Differently from Food-Grade?
Yes, and this distinction doesn't appear anywhere in the comedogenic scale literature, because the scale predates modern cosmetic filtration methods. The 1972 rabbit ear studies used raw rendered fat, not micro-filtered cosmetic-grade material. The ratings on every ingredient list online reflect that raw form.
When we developed our own cosmetic-grade filtration process, removing particulate matter was a core goal. Food-grade tallow retains rendered solids and carries a mild odour from the process. Cosmetic-grade tallow doesn't. The difference is visible and sensory, not just a label distinction.
Tallow has a four-thousand-year history on human skin, long before anyone thought to test it on rabbit ears. That history covers food-grade material, because cosmetic filtration didn't exist. Whether removing rendered particulates changes the comedogenic behaviour in a meaningful way is not known. No modern study has tested it. What dermatologists do associate with reduced pore irritation risk: smaller particle size and the absence of organic debris. Cosmetic-grade filtration addresses both.
The link to our cosmetic-grade filtration process explains the specific steps and what they remove. The short version: what ends up on your skin is not the same material Kligman tested in 1972.
Should You Use Tallow If You Have Oily or Acne-Prone Skin?
The honest answer splits by skin type. There's no universal yes or no here, and anyone telling you otherwise is oversimplifying. Here's the breakdown.
Dry and Normal Skin
Lower risk overall. Tallow is an occlusive moisturizer, meaning it sits on the skin surface and slows moisture loss. For dry skin, that's the whole point. A 2024 PMC scoping review (PMC11193910) found tallow increased skin hydration by 47.2% at 180 minutes. Dry skin is rarely acne-prone, and an occlusive layer won't trap excess sebum that isn't being produced.
Sensitive Skin
Generally compatible. Tallow's fatty acid profile is predominantly oleic acid and palmitic acid, both structurally similar to the lipids naturally found in human skin. The same PMC scoping review found no serious adverse effects in the studies it screened. That doesn't mean zero reactions are possible, but the sensitization profile is low.
Oily and Acne-Prone Skin
Proceed cautiously. This is where the occlusive nature of tallow becomes relevant. On oily skin, a heavy occlusive layer over active sebum production can contribute to congestion in some people. That's not a certainty. It's a risk worth managing rather than ignoring.
If you want to try tallow on oily or acne-prone skin: patch test a small area, the jaw or inner forearm works well, for two weeks before applying broadly to the face. A thin layer applied once daily behaves very differently from a thick application.
Most tallow brand content either says "safe for all skin types" or "avoid if acne-prone." Neither is nuanced enough to be useful. Skin response varies between individuals, and a two-week patch test on your actual skin will tell you more than any comedogenic rating. The rating gives you a prior. The patch test gives you data.
Frequently Asked Questions
Does beef tallow clog pores?
It depends on how it's applied and your skin type. Tallow's comedogenic rating is 1 to 2, placing it in the low range of a scale that runs from 0 to 5. A 2006 JAAD review by Draelos and DiNardo (PMID 16488305) found that low-rated ingredients can still cause congestion in excess, and high-rated ingredients don't always cause breakouts. Amount and skin type both matter.
What does a comedogenic rating of 1–2 mean?
The 0 to 5 comedogenic scale was developed by Kligman and Mills in 1972 (Arch Dermatol, PMID 4264346) using rabbit ear canal tests. A rating of 1 to 2 sits at the low end of that scale. It suggests a low theoretical risk of pore blockage, but the model has serious limitations for predicting human skin responses, as a 1982 JAAD paper by Frank SB (PMID 6461674) documented.
Is tallow safe for acne-prone skin?
Proceed cautiously rather than avoiding it outright or using it freely. Tallow is occlusive, which can be a factor on already oily skin. Thin application is meaningfully different from heavy application. A dermatologist's guidance is worth seeking if you have severe active acne. For mild acne or occasional breakouts, a controlled patch test over two weeks is a reasonable first step before broader use.
Can I use tallow on my face if I have oily skin?
Yes, with a patch test first. Apply a small amount to your jaw or inner forearm daily for two weeks and monitor for congestion or breakouts. Start with a very small, thin layer. Oily skin doesn't automatically mean tallow will cause problems, but the occlusive nature of the ingredient warrants a cautious introduction rather than an immediate full-face application.
The Bottom Line
Three things are worth taking away from all of this. First, the comedogenic scale is a rough directional tool from 1972 rabbit testing, not a validated predictor of your skin's response. Second, tallow's rating of 1 to 2 is low relative to many common skincare oils, but that rating doesn't account for filtration grade, formulation, or your specific skin type. Third, a two-week patch test will tell you more about your skin's actual response than any number on any ingredient list.
We make cosmetic-grade beef tallow balms in BC, micro-filtered, no added ingredients. If you want to test tallow on your skin, our shop is a reasonable starting point.