Vitamin D has numerous critical roles in human physiology and is imperative for supporting overall health from gestation to senescence. Vitamin D is unique because it can be synthesized in the skin. When 7-dehydrocholesterol reacts
to sunlight, it is transported to the liver and converted into the metabolically active form 1α,25-dihydroxyvitamin D.1 This process may be inefficient in those with darker skin tones and is dependent on sunlight intensity, which varies with latitude, season, and other factors.

Take one capsule per week. Do not exceed one capsule per week unless directed by your healthcare professional.

Orders are processed within 1–3 business days, depending on availability and credit card authorization. After processing, your order will ship at the speed you selected during checkout. Please note we don’t ship on weekends or major holidays, and shipping timelines may be affected by the carrier.
Once your package is scanned by the carrier, tracking information will be sent to you by email or text message. Please allow 24–48 hours for tracking details to update.

While we ensure satisfaction, we don't accept returns on any products or supplements. If you have any concerns, please email us at shop@jamesclinic.com, and we'll work to resolve them with you.