This is a high strength glucosamine and chondroitin formula that also provides potent levels of other nutrients. Each ingredient has been selected based on their different but complimentary functions and are presented at levels that are nutritionally relevant. Three tablets provide the full 1500mg of glucosamine sulphate the level used in many studies as well as 300mg of chondroitin sulphate (see note below) and 150mg of MSM per daily dose. The powerful bioflavonoid quercetin has been included at a potent 50mg plus 1200mg of ginger (as a concentrated extract) as well as 400mg of rose hip. Few if any joint formulas provide these potencies in a single formula. Chondroitin mislabeling: Many companies use a preparation that is just 20% chondroitin but their label may declare this as if it is 100% chondroitin. Therefore a supplement declared as ‘400mg chondroitin sulphate’ is often just 80mg of chondroitin. Of course this Lamberts® supplement uses 330mg of a 90% chondroitin sulphate preparation (per 3 tablets) to provide the 300mg of pure chondroitin.