Ingredients to Avoid With Alpha-Gal: A Skincare Label Guide

In skincare, the ingredients to watch with alpha-gal are the ones that can come from mammals: lanolin, tallow, stearic acid, glycerin, magnesium stearate, collagen and gelatin, plus milk ingredients like whey, casein and goat milk. Some are always animal derived; others can be plant or animal sourced, and labels rarely say which. 

Food labels are the labels that get the most attention after an alpha-gal diagnosis. Skincare labels are harder, because cosmetic ingredient names describe the chemical, not where it came from. This guide walks through the names to know, what each one is, and how to read a label without spending twenty minutes in the aisle.

Why do skincare ingredients matter with alpha-gal?

Alpha-gal is a sugar found in mammals. Many cosmetic ingredients are made from mammal fats, wool or tissue, so some people with alpha-gal choose to avoid them on their skin as well as in their food. How strict you need to be is a personal decision; your allergist is the right person to help you decide. What this guide can do is help you recognize the names of each ingredient.

If you are new to this discussion, start with our plain answer on emu oil and alpha-gal, then come back here for more information.

Which skincare ingredients are always mammal derived?

• Lanolin. A wax from sheep's wool. On labels it also appears as lanolin alcohol, lanolin oil, acetylated lanolin, wool wax and laneth (followed by a number). Common in lip balms, hand creams and rich balms.
• Tallow. Rendered fat, usually from cattle or sheep. Look for tallow, beef tallow, sodium tallowate (often in bar soap) and tallow glycerides.
• Gelatin. Made from collagen in animal skin and bones, usually pork or beef. The CDC lists gelatin among ingredients that may contain alpha-gal. Fish gelatin exists, so count gelatin as mammal derived unless the label says fish. Found in some peel-off masks and capsules.
• Milk ingredients. Milk, goat milk, whey, casein and colostrum all come from mammals.

Which ingredients can be plant or animal sourced?

These are the tricky ones. The same name on the label can mean a plant source or an animal source, and the label usually won't tell you which.

• Glycerin. Can be made from plant oils, animal fat or synthetic sources. The CDC lists glycerin among ingredients that may contain alpha-gal. Sometimes listed as glycerol. "Vegetable glycerin" on a label is a helpful sign, but the ingredient list itself often just says glycerin.
• Stearic acid. A fatty acid found in both animal fats and plant fats like shea butter and cocoa butter. Related names include glyceryl stearate and other ingredients ending in "stearate."
• Magnesium stearate. A salt of stearic acid, often used in pressed powders. It carries the same plant or animal question as stearic acid.
• Collagen. Usually from cows, pigs or fish. Marine collagen comes from fish, which is not a mammal, but the label needs to say so.
• Keratin. Hydrolyzed keratin is often made from wool, horns or feathers. It is never plant derived, so ask whether it comes from a mammal or a bird.
• Fatty alcohols. Cetyl, stearyl and cetearyl alcohol are usually plant derived today, but can come from animal fats.

We go deeper on the two most common ones in a later post on glycerin and stearic acid.

What about "fragrance"?

Fragrance can be listed as a single word, such as "fragrance" or "parfum," even when it is a blend of many components. That makes it hard to verify. For someone who needs to know every source, a Fragrance-Free product removes that question entirely.

How do you read a skincare label for alpha-gal?

A simple routine for the aisle or the product page:

• Scan for the always names first. Lanolin, tallow, gelatin, milk, whey, casein. If you see one, you have your answer.
• Circle the maybes. Glycerin, stearic acid, anything ending in "stearate," collagen, keratin, fatty alcohols. These need a source.
• Look for source words. "Vegetable," "plant-derived" or "marine" next to an ingredient helps. Their absence doesn't confirm an animal source; it just means you need to ask.
• Count the ingredients. A short list is faster to verify. A long list with fragrance is the hardest to clear.
• Ask the brand. Email the manufacturer and ask where each maybe ingredient comes from, and whether mammal-derived products are handled where it is made.

This list is not exhaustive. When in doubt, contact the manufacturer or skip the product.

What does a label with nothing to decode look like?

Here is ours, in full: Emu Oil and 0.15% Tocopherol (Vitamin E), a natural preservative that extends the oil's shelf life. No lanolin, no tallow, no glycerin, no stearic acid, no fragrance.

The emu is a bird, so the oil starts from a non-mammal source. Fully Refined Pure Emu Oil is AG-FREE®: made completely without mammal ingredients and verified by independent third-party testing. It is AEA Certified Fully Refined, refined and bottled in mammal-free environments in the USA. See the full process on our alpha-gal safety page.

Should you patch test even mammal-free products?

Yes. Individual sensitivities vary. The American Academy of Dermatology suggests applying a small amount to a quarter-sized spot on the inside of your arm twice a day for 7 to 10 days and watching for any redness, itching or swelling. If you have severe AGS or are unsure, talk to your allergist before trying anything new.

One less label to worry about

Reading labels gets faster with practice, and the right products make it shorter. If you want a moisturizing oil you can check in one glance, see AG-FREE® emu oil. One-time orders are always available, and Subscribe & Save takes 15% off every order with free shipping, every 60, 90 or 120 days. Cancel anytime. More answers live on our FAQ.

Sources

1. U.S. Food and Drug Administration, "Cosmetics Labeling Guide." fda.gov. Accessed October 14, 2026.
2. Alpha-gal Information, "Personal Care Products." alphagalinformation.org. Accessed October 14, 2026.
3. Centers for Disease Control and Prevention, "Products That May Contain Alpha-gal." cdc.gov. Accessed October 14, 2026.
4. U.S. Food and Drug Administration, "Fragrances in Cosmetics." fda.gov. Accessed October 14, 2026.
5. American Academy of Dermatology, "How to test skin care products." aad.org. Accessed October 14, 2026.