Studies have not shown a direct link between vitamins and dietary supplements and psoriatic disease. Yet many people with psoriasis and psoriatic arthritis find that including vitamins and supplements in their diet helps their skin clear and may ease joint pain. Dietary supplements can be extracts or concentrates, and they can occur in many forms, such as tablets, capsules, softgels, gelcaps, liquids or powders.
The U.S. Food and Drug Administration (FDA) does not regulate dietary supplements for safety or effectiveness. Because they are not regulated like a drug, their ingredients can be inconsistent. It's important you talk to your doctor before adding any vitamins or supplements to your treatment plan. Some may interfere with medications you are taking to manage your psoriasis or psoriatic arthritis.