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Does GHK-Cu work for all skin types
Ann Intern Med 158:526534 Ethics declarations Conflict of interest The authors declare that they have no conflict of interest
Freshness of ingredients is also a huge factor, which can be difficult to control outside the house
Notably, newborn infants are at risk of severe toxicity (as discussed in Contraindications), but in adults and older children, the small benzyl alcohol dose is very well tolerated
Capcarova M, Petruska P, Zbynovska K, Kolesarova A, Sirotkin AV
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