Another explanation may be related to behavioral aspects
The signal peptide GHK works in combination with Cu (copper) in the skin and controls the anti-aging factors
Always seek professional advice before combining supplements with prescribed medicines
One enrolled vegan/vegetarian subject was later excluded as a result of reported nausea and a low BMI, 1 omnivorous subject declined the challenge after being enrolled and giving consent, 3 subjects enrolled in the antibiotic suppression arms did not tolerate the antibiotics (gastrointestinal distress) and were thus excluded from the study, and 2 subjects admitting noncompliance with daily l-carnitine supplementation were only included in baseline challenge studies
Bottom line, how much do you want to trust an unknown, unregulated, overseas lab
We utilize personalized advanced functional lab testing to assess your nutrient status, detox capacity, and antioxidant needs (including NAC and glutathione)