In sensitivity analysis, we used different analysis methods robust to pleiotropy and replicated using an l-carnitine isoform, acetyl-carnitine
Wiebe N, Field CJ, Tonelli M (2018) A systematic review of the vitamin B12, folate and homocysteine triad across body mass index
A larger phase IIb trial of intranasal glutathione (300 mg/dose, three times daily for 3 months, n=45) also showed no significant improvement over placebo (Mischley et al., J Parkinsons Dis, 2017) [52]
The effects continue for a few days because of the peptides long half-life
Every lot is also screened for more than 450 banned substances with surveillance testing for environmental contaminants like heavy metals, microbiological agents or pesticides
48