Vitamin D3

$13.99 $4.20

Free Shipping

Free Returns

Promote bone health with Swanson Vitamin D3! Vitamin D, often called the sunshine vitamin, also supports immune and emotional health. Researchers and health professionals across the globe see the importance of adequate levels of vitamin D in the body, and you can too! Each capsule delivers 400 IU of vitamin D.


Supplement Facts

Serving Size 1 Capsule

Servings Per Container 250

Amount Per Serving % Daily Value
Vitamin D3 (as cholecalciferol) 10 mcg 50%

Other Ingredients: Rice flour, vegan capsule (hypromellose).

Suggested Use: As a dietary supplement, take one capsule one to two times per day with food and water.

Warning: For adults only. Consult your healthcare provider before using this or any product if you are pregnant or nursing, taking medication or have a medical condition.

Storage Instructions: Keep out of reach of children. Do not use if seal is broken. Store in a cool, dry place.




  1. What is the difference between vitamin D2 and vitamin D3?
    Vitamin D2 and vitamin D3 are two forms of vitamin D used in dietary supplements. Vitamin D3 is the form naturally produced by the body when skin is exposed to sunlight and is the form most commonly found in supplements. Both forms can help increase vitamin D intake, but vitamin D3 is often preferred in supplement formulations.
  2. Why is vitamin D called the sunshine vitamin?
    Vitamin D is often referred to as the "sunshine vitamin" because the body can produce it when skin is exposed to sunlight. Specifically, ultraviolet B (UVB) rays from the sun trigger a process that allows the body to synthesize vitamin D. Because factors such as season, geography, sunscreen use, and time spent indoors can affect sun exposure, many people choose to supplement their vitamin D intake.
  3. Why choose a high-potency vitamin D supplement?
    High-potency vitamin D supplements provide larger amounts of vitamin D in a single serving, which may be preferred by individuals looking to increase their vitamin D intake without taking multiple capsules or tablets. The right potency depends on individual needs, diet, lifestyle, and healthcare provider recommendations. Always follow the serving directions on the product label.
  4. How much vitamin D do I need each day?
    In 2016, the Food and Nutrition Board increased the Recommended Dietary Allowance (RDA) of vitamin D for most adults from 10 mcg (400 IU) to 15 mcg (600 IU) per day, and 20 mcg (800 IU) for ages 70+. Some doctors and nutritionists recommend higher daily vitamin D intakes, especially for those at risk for having low levels. The Vitamin D Council, an organization dedicated to raising awareness about vitamin D, recommends average adults supplement with 125 mcg (5,000 IU) of vitamin D daily. Talk with your doctor about your individual needs.
  5. Why choose a lower-potency vitamin D3 supplement like 400 IU?
    Swanson Vitamin D3 400 IU provides a moderate amount of vitamin D3 in each capsule, making it a convenient option for individuals who prefer a lower-potency supplement or want greater flexibility when incorporating vitamin D into their daily routine. A lower potency allows you to create a customized supplement stack with less worry about getting too much vitamin D.
  6. Is Swanson Vitamin D3 400 IU suitable for special diets?
    Yes. Swanson Vitamin D3 400 IU is gluten free, non-GMO, and dairy free, making it a great option for many individuals with common dietary preferences or sensitivities. However, this product is not suitable for vegetarians or vegans. If you follow a vegetarian or vegan lifestyle, we recommend reviewing the ingredient list or exploring one of our plant-based vitamin D alternatives.


Share