Vitamin d deficient;went to therapists/psychiatrists since 14;now22;vit d supplement the answer?how much iu vit d a day should i take?other ideas?

Depends on sun level: Vitamin d deficiency is quite classic in United States, especially areas with cold winters. In people that are overweight it is quite typical. The correct dose depends on you current vitamin d level. You also need to have a parathyroid level checked. Discuss this with your doctor this is who can give you a legitimate recommendation.