longevity science
Stop Adopting 1000 IU Longevity Science Requires More
Stop Adopting 1000 IU Longevity Science Requires More A 2021 randomized trial showed 80% of older adults taking 1000 IU daily still had insufficient skin-supporting vitamin D levels. In short, 1000 IU is generally too low for optimal longevity; most seniors need a higher dose and regular blood testing to