Like others, I give my dogs glucosamine and it seems to have clear health benefits, but I have tried numerous dosages for myself and when I consume any meaningful amount it gives me absolutely wretched headaches about a day or two after consumption. Something to be aware if you start taking glucosamine and get headaches, it’s probably the glucosamine.
I had that thought but have never formally tested it. I do eat an above-average amount of crab, clams, scallops, shrimp (tail on), etc... and I always feel great afterwards. Obviously a glucosamine tablet is far more concentrated, so I could very well be allergic.
