Many peptides referenced are investigational and not FDA-approved for all uses
Youth Safety Institute
As one person put it: "Very common for people on a restricted calorie diet and losing weight." - FatGuy48 Other factors mentioned in the textfile include: reduced intrinsic factor in some users the combined effect of medications like metformin pre-existing low levels that worsen during weight loss Regardless of the pathway, the pattern is clear: B12 can drop quickly during significant appetite reduction, and deficiency tends to worsen quietly until symptoms demand attention
Rosvall F, Jedeskog, U, Andersson JK, Sderberg T, Hagert E
How to Use GHK-Cu in a Post-Weight Loss Routine If you want to use GHK-Cu to improve the quality and texture of your post-weight loss skin, here is the best way to incorporate it safely
(PubMed) de Jager CA, Oulhaj A, Jacoby R, Refsum H, Smith AD