Ingredient
Glycine
What is Glycine?
Glycine is a non-essential amino acid that is naturally present in many proteins. It can also be produced synthetically through chemical processes involving chloroacetic acid and ammonia.
It is commonly used in food products and supplements for its role in building proteins and other vital compounds in the body. Some research suggests glycine may have benefits such as supporting collagen synthesis and having anti-inflammatory properties. However, evidence on its effectiveness for specific health outcomes is still emerging and mixed.
In product labels, glycine is often included in supplements, particularly those aimed at improving joint and skin health due to its role in collagen production.
Commonly found in: Supplements, Protein Powders, Cosmetics, Skincare Products, Pharmaceuticals, Food Flavoring
Benefits
- Glycine plays a role in protein synthesis and is a building block for collagen, which supports skin, muscles, and bones.
- Some studies suggest it may promote better sleep quality and have calming effects on the brain.
Glycine is generally recognized as safe (GRAS) by the FDA for use in food products.
Some studies highlight its potential benefits for collagen production and sleep improvement, but more research is needed for conclusive evidence.
Glycine itself is not derived from animals, making it suitable for vegan diets when sourced synthetically.
Scout's take
Beneficial ingredient — whole-food or functional value in this product class.
The case against
There are minimal risks associated with glycine in cosmetics.
from the analysis of The Ordinary - The Natural Moisturizing Factors + HA( / )Generally considered safe with low risk of irritation.
from the analysis of Salt & Stone Body Wash - Bergamot & HinokiThe case for
It helps to improve skin texture and supports collagen production.
from the analysis of The Ordinary - The Natural Moisturizing Factors + HA( / )Contributes to skin conditioning and smoothness.
from the analysis of The Honest Company Sensitive Face + Body Lotion Fragrance FreeSupports skin hydration and improves texture.
from the analysis of Salt & Stone Body Wash - Bergamot & HinokiMore from Scout's analyses
Amino acid and inhibitory neurotransmitter that supports sleep onset and calm focus; complements saffron's mood and sleep benefits.
from the analysis of Solaray Saffron Extract 30mg3,000mg of the simplest amino acid supporting collagen synthesis, sleep quality, neurotransmission, and detoxification pathways.
from the analysis of Source Athletic HydrationHumectant / hydrating sugar or amino acid — draws moisture to skin.
from the analysis of W3LL People Bio Powder FoundationFound in 7 products
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