Like other types of animal protein, collagen contains a type of amino acid called hydroxyproline ( Hydroxyproline is converted into oxalate in your body, which may increase levels of oxalate excretion in urine ( In one older study, consuming 30 grams of gelatin derived from collagen increased urinary oxalate excretion by 43% after 24 hours compared with a control group ( Several animal studies also show that consuming high amounts of hydroxyproline could increase oxalate levels in the urine, and therefore, may harm kidney health ( Other test-tube and animal studies suggest that these effects could be amplified in those with primary hyperoxaluria, a genetic disorder that affects oxalate metabolism and increases the risk of recurrent kidney stones ( However, keep in mind that most of these studies used concentrated amounts of hydroxyproline
Other studies on side effects or risks from acetaminophen: Ototoxicity: Regular use of acetaminophen increases the relative risk of hearing loss by 22%
S-fruitbody bacterial community was specifically enriched with amino acid catabolic pathways, and S-fruitbody-specific Pseudomonas pt 97.28 rapidly utilized amino acids such as L-arginine, L-ornithine, and L-histidine, as well as D-trehalose
Limitations Substantial heterogeneity was observed between studies in brain and blood GSH in AD and MCI
