• reduced immunity,
• increased susceptibility to infections,
• decreased physical performance,
• impaired wound healing,
• impaired collagen formation,
• gingival bleeding,
• impairment of all other processes which require and involve vitamin C,
• scurvy.

In addition, long-term vitamin C deficiency may intensify the formation of canceorus and atherosclerotic changes, as well as increase blood pressure.

Elderly people, alcoholics, smokers and people on certain medication (e.g. aspirin, sulfonamides, barbiturates) are at risk of vitamin C deficiency.