Although L-carnitine does not appear to cause significant side effects, high doses (5 or more grams per day) may cause diarrhea
In this study, 80 participants were randomly assigned to receive either L-tyrosine (2000 mg), L-theanine (200 mg), or a placebo before undergoing a high-stress scenario involving a virtual reality-based active shooter training drill and cognitive challenges like the Stroop test and mental arithmetic
GHK-Cu is naturally present in the body and is safely administered under medical supervision
Balogh M, Varga BK, Karadi DA, Riba P, Puskar Z, Kozsurek M, Al-Khrasani M, Kiraly K (2019) Similarity and dissimilarity in antinociceptive effects of dipeptidyl-peptidase 4 inhibitors, Diprotin A and vildagliptin in rat inflammatory pain models following spinal administration
GHK-Cu can reduce the severity of mottled hyperpigmentation, skin spots, and lesions, and improve the rate of recovery of skin stem cells [11]