Popular vitamin D supplement may have an unexpected effect, experts warn By Melissa Rudy Fox News Published October 13, 2025 7:00am EDT

Popular vitamin D supplement may have an unexpected effect, experts warn Taking vitamin D2 can cause reduced levels of vitamin D3 in the body, research suggests Melissa Rudy By Melissa Rudy Fox News Published October 13, 2025 7:00am EDT https://www.foxnews.com/health/popular-vitamin-d-supplement-may-have-unexpected-effect-experts-warn