The study divided 51 participants into three groups: one received an injection of 50 mg of B6 a day, another 100 mg, and a control group. After 14 days of supplementation, those who received 50 to ...

Vitamin B6 is important for your health, but too much can cause nerve damage and photosensitivity. Symptoms of nerve damage include numbness, tingling, muscle weakness, and reduced skin sensitivity.