The GHK-Cu hair growth solution supports follicle repair and scalp health, making it an excellent addition to both medical and regenerative hair therapies
This study below, published in 1967 carried out trials to determine how long cyanocobalamin and hydroxocobalamin B12 injections lasted before excretion in urine but you can see from their summary that it would be unreliable to assume that one size fits all
J Clin Endocrinol Metab 44: 203-206
ORCID: Affiliation: 13 Department of Biochemistry, Institute of Chemistry, University of So Paulo, Cidade Universitria, So Paulo CEP 05508-000, SP, Brazil 14 International Joint Research Center on Purinergic Signalling, School of Health and Rehabilitation, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, Sichuan, China These authors contributed equally to this work
Reported side effects are rare and mild: Localized irritation or redness at injection site