The verdict: GHK-Cu for skin, collagen peptides for hair/nails Choose GHK-Cu if: Skin anti-aging is primary goal Want injectable or topical option Focused on wrinkles and firmness Choose collagen peptides if: Want overall beauty benefits Prefer oral supplementation Hair and nails are priority Best peptide combinations and stacks Combining peptides provides synergistic benefits
Chemotherapy and other bone marrow-suppressing agents require special oversight
David Pope , PharmDchief pharmacy officer, Xifin Pharmacy Solutions, a pharmacy-industry firm
Barakat, J
Modest weight loss often produces substantial symptom improvement independent of other interventions
The chronic use of any of these medications has the potential to cause complications related to vitamin B12 deficiency, which includes impaired DNA synthesis, impaired cell division, hematopoiesis, hyperhomocysteinemia, and metabolism of odd-chain fatty acids that is necessary in preventing demyelination of nerves