Potential Side Effects L-Glutamine is generally safe when taken at recommended doses (5-15 grams daily)
PMID: 26279367
Commonly referenced guidance includes: Initial replacement Maintenance For maintenance, the BNF lists adult prophylaxis/maintenance dosing such as 1 mg intramuscularly every 23 months in appropriate cases
Rare or Serious Side Effects Serious side effects from GHK-Cu are rare
10.3389/fphys.2018.00477 Front Physiol
Links to Sources: What to Know About the Amino Acid L-Carnitine, healthline Effects of L-Carnitine supplementation on weight loss and body composition: A systematic review and meta-analysis of 37 randomized controlled clinical trials with dose-response analysis, PubMed, National Library of Medicine The Effects of L-Carnitine, Acetyl-L-Carnitine, and Propionyl-L-Carnitine on Body Mass in Type 2 Diabetes Mellitus Patients, PubMedCentral, National Library of Medicine L-Carnitine Supplementation in Recovery after Exercise, Nutrients, MDPI Effect of Acute and Chronic Oral L-Carnitine Supplementation on Exercise Performance Based on the Exercise Intensity: A Systematic Review, Nutrients, MDPI