Top sources include: Gelatin Collagen Bone broth Pork rinds/pork skins Turkey and chicken (especially dark meat with skin on) Spirulina Sesame seeds Pumpkin seeds Cysteine- and Glutamine-Rich Foods Many protein-rich foods supply both of these amino acids: Whey protein (one of the most well-researched foods for raising blood and cellular glutathione levels) 21 22 Chicken and turkey Beef and pork Fish Yogurt and cottage cheese Tofu and tempeh Cruciferous Vegetables Broccoli, cauliflower, Brussels sprouts, kale, cabbage, collard greens, bok choy, radish, watercress, and arugula are rich in sulforaphane and related compounds
Pierson et al., 2022
New York: McGraw-Hill Companies
(National Library of Medicine) Why is IGF-1 LR3 studied for muscle and recovery
Belzung C
Bie JD, Langbeen A, Verlaet AAJ, Florizoone F, Imming I, Hermans N, et al