Hi Cate –
I agree, some supplements are harmful in excess. However, glucosamine, chondroitin and hyaluronic acid are very safe supplements. They can be consumed at many times the daily dose with no ill effects. The amounts in food are very low with most having only around 400 mg. glucosamine per kilogram of food – this equates to a mere 30 or so mg. per cup (just to give you an idea – a 50 lb. dog would have to eat over 30 cups of dog food a day just to get a maintenance dose of glucosamine). Dogs that are eating a natural diet rich in bones, cartilage and sinew would naturally be consuming these nutrients in very high levels (higher than anything in dry dog food). I’ve never heard of a dog “overdosing” on GAG’s.
