Swanson Vitamin D3 400 IU (10 mcg) - 250 Capsules

Key Benefits of Vitamin D3

• Bone Health: Vitamin D promotes calcium absorption, essential for building and maintaining strong bones. Adequate levels may reduce the risk of fractures and osteoporosis later in life.
• Immune Function: Supports the normal functioning of the immune system, helping your body defend against seasonal challenges.
• Muscle Function: Contributes to normal muscle function, supporting mobility and balance.
• Calcium Absorption: Without sufficient vitamin D, your body cannot absorb calcium efficiently, even if consumed through diet.
• Overall Wellness: Vitamin D receptors are found throughout the body, influencing mood, cell growth, and cardiovascular health.

Understanding Vitamin D3 and D2

Vitamin D exists in two primary forms: ergocalciferol (D2) and cholecalciferol (D3). Research suggests D3 is more effective at raising and maintaining blood levels of 25-hydroxyvitamin D. Swanson uses vitamin D3 sourced from lanolin, a natural and well-absorbed form. As a fat-soluble vitamin, it is best absorbed when taken with a meal containing dietary fat, enhancing bioavailability.

Who Should Consider Vitamin D Supplementation?

Many adults can benefit from vitamin D supplementation, especially those with limited sun exposure, darker skin tones (which produce less vitamin D from sunlight), older adults, or individuals living in northern latitudes during winter months—a common scenario for Canadians. People who follow a vegan diet should note this product’s D3 is derived from lanolin and not suitable for vegans; a plant-based D2 or lichen-derived D3 may be preferable. Note: It is a good idea to check your vitamin D levels with a blood test before starting supplementation and to consult a healthcare professional to determine the right dosage.

How to Take Swanson Vitamin D3

As a dietary supplement, take one capsule daily with food and water. The 400 IU dosage is a common maintenance level suitable for most adults. Consistency is key—taking your capsule at the same time each day can help establish a routine. If you have specific health concerns or are taking other medications, speak with your healthcare provider before use. Pairing it with a meal containing healthy fats may enhance absorption.

Quality and Purity You Can Trust

Swanson has been a trusted name in supplements for decades. Their products are manufactured in GMP-certified facilities and undergo rigorous purity and potency testing, including independent third-party lab analysis. This commitment ensures each capsule delivers exactly what’s listed on the label—No more, No less. From ingredient selection to final packaging, Swanson’s team of pharmacists, scientists, and nutrition experts uphold strict quality standards.

Safety and Side Effects

Vitamin D is generally safe when taken as directed. However, extremely high doses over prolonged periods can lead to toxicity, causing nausea, weakness, or kidney issues. The 400 IU dosage is well within recommended daily intakes for most adults. If you are pregnant, nursing, or have a medical condition, consult your healthcare provider. This natural health product is not intended to diagnose, treat, , or prevent any disease. Always read the label and follow directions for use.

What Makes Swanson Vitamin D3 Special?

Vitamin D plays a vital role in maintaining strong bones, a healthy immune system, and overall wellness. Yet many people fall short of optimal levels due to limited sun exposure or dietary intake. Swanson Vitamin D3 delivers 400 IU (10 mcg) of cholecalciferol per capsule—the same form naturally produced by your skin when exposed to sunlight. This convenient, once-daily supplement helps fill nutritional gaps and supports your body's essential functions. Each bottle provides 250 capsules, offering an eight-month supply of consistent vitamin D support.