The "joint unblockers"
Although this name also covers other ailments of the tendons, joints and bones, the everyday term 'rheumatism' means osteoarthritis. This form is the most widespread: 10 million people in France suffer from it.
Related to the degeneration of the joints, especially in association with ageing, you might think that it is inevitable. The main causes are well known nowadays: of course there is the reduced ability of the body to repair itself, but above all there is also oxidative stress and inflammation, which can also be reduced through the diet. (see our general advice in the Joints file).
It is vital for multiplying the chondrocytes, or the cartilage cells used in the process of maintenance and renewal, notably by producing collagen fibre that provides both solidity and the ability to absorb impact.
It is vital for the synthesis of collagen and for other constituents of the joints (chondroitin sulphate, glucosamine). It is an agent that promotes both structure and architecture, as well as regeneration. It also plays a role in the metabolism of molecules that regulate inflammation.
Collagen contains a special amino acid, hydroxy-proline, obtained from proline through the action of vitamin C. 
A trace element with a major antioxidative role. It is the co-factor of an essential enzyme for the synthesis of the components of cartilage (chondroitin sulphate, glucosamine).
Its effects on the bones are well known, but it also has a protective effect against wearing of the joints. It also inhibits the formation of pro-inflammatory compounds.
They slow down the production of pro-inflammatory compounds and stimulate the production of molecules vital for tissue repair, called resolvins. Studies show that they are able to slow down enzymes that degrade cartilage.
They play a major role in oxidative stress, a cause of ageing. So, in addition to the trace elements and vitamins already cited for their protective properties, favour a mix of colours on your plate mainly consisting of plants, vegetables and fruit, varied to taste.
• Seniors, certainly: taking action does not stop natural ageing but enables you to age "healthily".
• Genetically predisposed persons: in general when several family members suffer from osteoarthritis. Taking action early is vital.
• Overweight people: with the support of a health professional, first take action for the excess weight and its causes (diet, stress, lack of sleep).
• People who have suffered falls or fractures: providing the cartilage with soothing and reconstructive compounds can only be beneficial.
• For all those experiencing daily micro-trauma: repetitive movements, parachuting, professional or regular amateur sportspeople; without regard for performing the activity in optimum conditions and in moderation.