In rare cases: headache, dizziness, anxiety, or gastrointestinal disturbances
Vitamin B6 deficiency can occur in individuals with poor-quality diets that are deficient in many nutrients
Another set of B12 deficiency symptoms are neurological, such as irritability, memory problems, depression, visual disturbances, tingling or numbness of hands and feet, pins and needles and eventually, in severe cases, a dementia-like illness, psychosis with hallucinations and paranoia (EFSA, 2015
Although there are some studies that support the conventional wisdom that a glass of red wine a day can have potential health benefits, these claims have not been rigorously proven
The frequency varies based on individual goals and needs