What form of Vitamin D is this? Swanson D3 delivers the most biologically active form of vitamin D3 (cholecalciferol) in an easy-to-swallow softgel — the sunshine vitamin. Does this support bone health? Yes — getting enough vitamin D through diet and sun exposure can be difficult, but this supplement contains 125 mcg (5,000 IU) to support teeth and bone health, especially as you age.* Does this support heart and immune health? Yes — in addition to aiding healthy bones, our supplement supports immune, muscle, cardiovascular, and metabolic health.* Does this support mood? Yes — Swanson D3 may also help maintain a positive mindset by supporting a healthy microbiome.* Can I trust the quality of this supplement? Swanson is a name you can rely on — our products are manufactured to the highest standards, ensuring you get trusted quality, every time. This Swanson product is formulated with science and crafted with care. Did you know that 75–90% of people in the United States are vitamin D deficient? Our D3 dietary supplement delivers 125 mcg of vitamin D3 to help cover gaps in your diet, especially if you have decreased sun exposure or live in northern latitudes.*Vitamin D plays a major role in bone health, helping maintain healthy bones through encouraging proper calcium absorption.* By aiding calcium uptake, the formula offers critical bone support while also supporting healthy teeth and muscles.* Regular use can also contribute to metabolism support.*Beyond structural benefits, vitamin D helps support immune health by nurturing a balanced gut environment.* It can also contribute to heart health.* This vitamin supplement undergoes rigorous testing to offer purity and potency you can rely on. Trust Swanson D3 to support you on your wellness journey.*We don't cut corners when it comes to quality. We provide hundreds of honest-to-goodness health products because we carefully select and source our ingredients and only work with partners we know and trust. Driven by over 150 years of combined experience, our dedicated team of pharmacists, scientists, food nutritionists, quality experts, research and development and product specialists ensures that all of our products are tested to ensure guaranteed purity, potency and reliability.