Keratin

Protein

Keratin at a glance

Category: Protein
Also called
Diets reviewed: 26 diets

What is Keratin?

Keratin is a fibrous structural protein that is a key component in the outer layer of human and animal skin, as well as hair, nails, and horns. It is renowned for its durability and protective qualities. While keratin is predominantly used in cosmetic and hair products to improve hair strength and shine, it can also be found in some supplements and medications. However, it is not typically used as an ingredient in food products.

Also known as:

Diet Compatibility

VeganAvoid

Animal product not typically used in food (more typically seen in medications, supplements, cosmetics and/or cleaning supplies).

PescatarianCaution

Animal product not typically used in food (more typically seen in medications, supplements, cosmetics and/or cleaning supplies). Keratin is dervied from feather, wool and/or horns. Obtaining horns and feathers often require slaughter.

VegetarianCaution

Animal product not typically used in food (more typically seen in medications, supplements, cosmetics and/or cleaning supplies). Keratin is dervied from feather, wool and/or horns. Obtaining horns and feathers often require slaughter.

Alpha-Gal FriendlySafe

This ingredient is generally considered compatible with a Alphagal diet.

Barley FreeSafe

This ingredient is generally considered compatible with a Barley Free diet.

Corn FreeSafe

This ingredient is generally considered compatible with a Corn Free diet.

Dairy FreeSafe

This ingredient is generally considered compatible with a Dairy Free diet.

Egg FreeSafe

This ingredient is generally considered compatible with a Egg Free diet.

Fish FreeSafe

This ingredient is generally considered compatible with a Fish Free diet.

Garlic FreeSafe

This ingredient is generally considered compatible with a Garlic Free diet.

GERD FriendlySafe

This ingredient is generally considered compatible with a Gerd diet.

Gluten FreeSafe

This ingredient is generally considered compatible with a Gluten Free diet.

Lactose FreeSafe

This ingredient is generally considered compatible with a Lactose Free diet.

Low FODMAPSafe

This ingredient is generally considered compatible with a Fodmap diet.

Lupin FreeSafe

This ingredient is generally considered compatible with a Lupin Free diet.

Milk FreeSafe

This ingredient is generally considered compatible with a Milk Free diet.

Nightshade FreeSafe

This ingredient is generally considered compatible with a Nightshades diet.

Oat FreeSafe

This ingredient is generally considered compatible with a Oat Free diet.

Onion FreeSafe

This ingredient is generally considered compatible with a Onion Free diet.

Peanut FreeSafe

This ingredient is generally considered compatible with a Peanut Free diet.

Rye FreeSafe

This ingredient is generally considered compatible with a Rye Free diet.

Sesame FreeSafe

This ingredient is generally considered compatible with a Sesame Free diet.

Shellfish FreeSafe

This ingredient is generally considered compatible with a Shell Fish Free diet.

Soy FreeSafe

This ingredient is generally considered compatible with a Soy Free diet.

Tree Nut FreeSafe

This ingredient is generally considered compatible with a Tree Nut Free diet.

Wheat FreeSafe

This ingredient is generally considered compatible with a Wheat Free diet.

Compatibility ratings are general guidelines and may vary by individual. Always consult a healthcare professional for personalized dietary advice.

Why People Avoid Keratin

People avoid keratin mainly because it is derived from animal sources, making it unsuitable for vegans. As it is not commonly used in food, dietary avoidance is less of a concern compared to other animal-derived ingredients. However, those adhering strictly to vegan or vegetarian lifestyles might avoid supplements or cosmetic products containing keratin.

This information is for educational purposes only and should not be considered medical advice. Individual reactions can vary. Consult a healthcare professional if you have concerns about specific ingredients.

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Frequently Asked Questions

How Spoonful reviews ingredients

Evidence-based. Diet compatibility ratings are compiled from peer-reviewed nutrition guidance, dietary association recommendations, and ingredient composition data.
Continuously updated. Our ingredient database is refreshed as new sources and product data become available.
Transparent uncertainty. When an ingredient's safety depends on serving size, preparation, or sub-ingredients, we mark it “caution” rather than forcing a binary answer.
Not medical advice. Ratings are general guidance. Always consult a registered dietitian for personalized recommendations.

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