Best vitamin D supplements 2025: reviewed by nutrition experts - Which?

Best Vitamin D Supplements 2025

Our nutrition experts have reviewed vitamin D supplements from various brands, including BetterYou, Boots, Holland & Barrett, and Vitabiotics, to find the best options.

A public health nutritionist with over 20 years of experience at Which? and the NHS has provided evidence-based insights on food and nutrition.

Our Review Process

We analyzed 30 popular vitamin D supplements, including tablets, capsules, sprays, drops, and gummies, to determine the most readily absorbed options with the fewest unwanted extras.

Our recommended products are independently lab-tested to ensure they meet the label claims.

We uncover the products you can trust to give you the best value and quality.

Author's summary: Experts review top vitamin D supplements.

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Which? Which? — 2025-10-15