“GHK-Cu has been studied in people.”

Supported with scope

The reviewed evidence supports this exact statement only in the situation described below.

Yes, but the cited topical trial had 13 completers, found no significant objective improvement in erythema, wrinkles, or skin quality, and reported higher patient satisfaction. It does not establish broader outcomes or other routes.

What this answer is based on

This answer uses a study that assigned people to groups by chance and measured a health outcome.

Limits of this answer

A specific topical copper-tripeptide formulation after CO2 laser resurfacing. These limits show which substance, product, people, use, place, and time the answer covers. A different product or situation can have a different answer.

Topic

What a study measured about people's health, symptoms, or ability to function.