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Description
It carries an arginine substitution at position 3 and a 13-amino-acid N-terminal extension, giving it 83 amino acids total versus 70 for native IGF-1

Jeong et al., 2018 GHK-Peptide Complex Human Trial Main Conclusion: A 6-month human trial demonstrated that GHK-peptides significantly increase hair density and total hair count with a perfect safety profile

You may want to take vitamin D supplements with food to maximize absorption

Vitamin B12 is an essential nutrient, and not produced by the body
