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Many adults suffer from deficiency due to diet or absorption issues
Topical applications also face absorption challenges, affecting only superficial skin layers rather than providing systemic benefits
The problem is narrower: we still cant answer the basic stuff, what this molecule actually is, whether the body makes it, how its supposed to work, and whether its safe in people
This does not mean more is better
The peptide increases production of Type I collagen, the structural protein that gives skin its firmness
Proopiomelanocortin deficiency treated with a melanocortin-4 receptor agonist
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