Because your digestion slows down overnight, a heavy dinner sits in your stomach for hours
In 2011, for example, researchers who administered 1,000mg per day of non-liposomal glutathione found "no significant changes were observed in biomarkers of oxidative stress" in participants after four weeks.2 In contrast, a 2019 study of identical length administered liposomal glutathione at 500-1,000mg doses and saw significant decreases in oxidative stress biomarkers plus improvements in immune system markers.3 Two of our top recommended glutathione supplements are liposomal, by the way: Codeage Liposomal Glutathione, our recommendation for most people Quicksilver Scientific Glutathione, our top liquid glutathione supplement Branded glutathione Glutathione supplements often use one of two branded versions of glutathione that are formulated to improve absorption: Setria or Opitac
In fact, some researchers have suggested it may be selenium, not protein, that is responsible for increasing IGF-1
If there's any suspicion of kidney damage, they may add a urine test, but usually, a simple annual blood test is all you'll need as long as you aren't experiencing serious side effects