Glucosamine, the only substance that repairs the joints

With respect to collagen, the situation is more nebulous. There is a study in which many followers of collagen refer. This is the one that showed that a dosage of 20 micrograms per day of Type II collagen improves the condition of some patients with rheumatoid arthritis. This is actually a very small amount of collagen. In this study four assays were used: 20, 100, 500 and 2500 micrograms. Is the lower dosage was useful in only 15% of participants. The most important assays have not performed better than placebo.
The study authors believe that this collagen, at a low dose, induce tolerance to a specific antigen, which inhibit the autoimmune reaction. Further research is needed to elucidate this action.
It is therefore wrong to suggest that collagen is more effective than glucosamine to repair the damaged joint tissues.
Glucosamine is the substance to which the body makes a specific call to repair these tissues.
For its part, the collagen is a protein of connective tissue that holds our organs in place giving them strength and elasticity. These two substances do not form the same work.
Whether the collagen in cartilage exists in a proportion of 67% and glucosamine in a ratio of 1% is not that collagen has a repair function but glucosamine.
Like my colleague Guy Bohémier ND I consider glucosamine supplement is the best that we can use to repair a damaged joint. By cons, if it is to treat inflammation (and it often precedes the deterioration of the joint) it will be necessary to apply another protocol also using a diet and supplements to the properties anti-inflammatory.