Glutamic Acid
Appears in 2 scanned products.
An amino acid, one of the basic building blocks of proteins, that also occurs naturally in skin as part of its moisture-holding system.
Why it’s used
Used as a humectant and skin-conditioning agent, and sometimes as a mild pH adjuster. It can also serve as a building block for surfactants like sodium cocoyl glutamate.
What the evidence says
The Cosmetic Ingredient Review panel has assessed glutamic acid and related glutamate ingredients and found them safe as used in cosmetics. It is not a common sensitizer and has a long history of use in skin care.
Context
Used at low concentrations in both rinse-off and leave-on products. No meaningful difference in concern between the two contexts at typical use levels.
As a supplement
Talk to your doctor or pharmacist.
Roll Call does not check drug interactions or assess personal safety.
A non-essential amino acid that the body produces on its own and that is also abundant in ordinary dietary protein. In supplements it may appear as free glutamic acid or as part of a protein blend.
Why it’s used
Included in some formulas as a protein-building amino acid, occasionally marketed for cognitive or digestive support, though it is more commonly recognized as a component of everyday dietary protein than as a standalone active.
What the evidence says
There is no NIH ODS fact sheet on glutamic acid as a standalone supplement, and human trials testing free glutamic acid supplementation for a specific health outcome are sparse. Most of what is known about glutamic acid concerns its role as a normal dietary amino acid and as a neurotransmitter precursor in the body, not as a supplement with a demonstrated added benefit.
Where we looked
There was no paper to cite here, so this is the search instead — run it yourself and see what we saw.
- PubMed: 21 records · searched August 2026
"Glutamic Acid"[Title/Abstract] AND ("dietary supplements"[MeSH] OR supplementation[Title/Abstract] OR supplement[Title/Abstract] OR supplements[Title/Abstract] OR "oral administration"[Title/Abstract]) AND (randomized controlled trial[pt] OR clinical trial[pt] OR meta-analysis[pt] OR systematic review[pt]) AND humans[MeSH] - PubMed: 29331 records · searched August 2026
"Glutamic Acid"[Title/Abstract]
This says what this database holds under these terms. It is not a finding that no research exists.
Context
No consistent studied dose range for a specific health outcome has been established in the literature reviewed.
Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.