Based on a quick survey [1], seems like various forms of glucosamine are not interchangeable. Doesn't this confound the study further given its unclear which s

Based on a quick survey [1], seems like various forms of glucosamine are not interchangeable. Doesn't this confound the study further given its unclear which supplements led to what outcomes? [1] https://www.mayoclinic.org/drugs-supplements-glucosamine/art-20362874 https://www.mayoclinic.org/drugs-supplements-glucosamine/art...