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While short-term fasting decreases serum IGF-I but does not affect GHBP (69), the triad of IGF-I deficiency, poor growth and pubertal delay/arrest in long term nutritional deficiency such as in anorexia nervosa is associated with low GHBP that is partly restored with weight gain (63)

PubMed PMID: 34380875 Sikiric et al

Can Vitamin B12 Reverse Premature Gray Hair?If vitamin B12 deficiency is the cause of premature graying, then it can be reversed with vitamin B12 supplementation

T.G., K.R., B.B.-G., and S.R.-R

ClinicalTrials.gov search for the KLOW blend (GHK-Cu + BPC-157 + TB-500 + KPV) returns no registered clinical trial (evidence-gap note