Experts Caution Against Potential Risks of Vitamin D Supplements

WHO:

ScienceDaily - Scientists are involved in the research regarding vitamin D supplements.

WHAT:

ScienceDaily - New research suggests that taking vitamin D2 can lower the body's levels of vitamin D3.

ScienceDaily - Vitamin D3 is the form of vitamin D that is naturally produced by sunlight and is more effective at boosting overall vitamin D levels.

ScienceDaily - Previous studies indicate that vitamin D3 may provide stronger immune protection against viruses and bacteria.

WHY:

ScienceDaily - The unexpected downside of vitamin D2 is that it may interfere with the body's natural production of vitamin D3.

HOW:

ScienceDaily - The research highlights the differences in effectiveness between vitamin D2 and vitamin D3 in terms of immune protection and overall vitamin D levels.

(UPDATED October 8, 2026 19:09 UTC)

New research indicates that taking vitamin D2 supplements may actually lower the body's levels of vitamin D3, which is the form of vitamin D produced naturally by sunlight and known to be more effective at boosting overall vitamin D levels. Previous studies have suggested that vitamin D3 provides stronger immune protection against viruses and bacteria, making this finding particularly significant. The research highlights the unexpected downside of vitamin D2, as it may interfere with the body's natural production of vitamin D3, raising important questions about the effectiveness of these supplements.