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    Created in 2008, Phoenix Rising is the largest and oldest forum dedicated to furthering the understanding of and finding treatments for complex chronic illnesses such as chronic fatigue syndrome (ME/CFS), fibromyalgia (FM), long COVID, postural orthostatic tachycardia syndrome (POTS), mast cell activation syndrome (MCAS), and allied diseases.

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best form of vitamin C for collagen production

What forms of vitamin C do you all use that is optimal for collagen production? Or, is ascorbic acid sufficient? Also, I've got a friend who cannot tolerate citric acid nor malic acid; he also cannot tolerate FRUIT. He is having some issues with tendon/ligament pain and tearing; any suggestions on how he can get more vitamin C in his diet WITHOUT supplementation, and without eating fruit (since he is unable to tolerate)? Thanks in advance!