Supplements containing as much as 12.5 times the recommended daily dose of vitamins are being sold on online marketplaces, ...

The NHS advises that the daily intake of Vitamin D should be 10 micrograms (μg), but adults can safely consume up to 100μg, ...

Which? looked at Vitamin D, Vitamin A, Vitamin B6 and Zinc supplements listed for sale on popular online marketplaces.

Sunlight and diet provide most of our vitamin D, but in modern life, many people struggle to maintain optimal levels. Whether it's due to indoor lifestyles, limited sun exposure, or dietary gaps, ...

We found supplements being sold with doses way beyond recommended upper safety limits, and taking too much can have serious ...

A study found that daily vitamin D supplements helped slow telomere shortening—the cellular process linked to aging and ...

Vitamin D2 supplements may negatively impact circulating levels of vitamin D3 and negate the latter's potential benefits, ...

“However, we discovered that vitamin D2 supplements can actually decrease levels of vitamin D3 in the body, which is a previously unknown effect of taking these supplements. This study suggests that ...

Higher doses of vitamin D3 supplementation did not significantly reduce cardiac biomarkers in older adults with low serum vitamin D levels. The STURDY trial found no significant differences in ...

Researchers from the University of Surrey in the UK found that taking vitamin D2 can cause reduced levels of vitamin D3 in ...