Swanson Kelp Iodine Source helps maintain thyroid balance with iodine from Atlantic kelp, and Swanson's science-backed heritage makes it a trusted, affordable daily pick.

Available Sizes & Variants:

250 tablets Swanson Kelp Iodine Source – convenient daily dose

Benefits & Features:

• Iodine+ from kelp supports normal thyroid function for steady energy.
• 225 micrograms of iodine per tablet provides a highly bioavailable dose that fits into everyday routines, helping those on plant based diets maintain their iodine intake.
• Designed for daily use as part of a balanced wellness habit.
• Swanson's science backed heritage ensures you get a dependable, affordable option.
• Easy to swallow.

Swanson's kelp iodine source comes from nutrient-packed Ocean kelp and is designed to support thyroid function with a highly bioavailable iodine dose. The brand has been delivering science backed wellness since 1969, earning trust through affordability and reliable formulations. Sourced from Atlantic kelp, this product reflects Swanson's commitment to quality and practical daily support. It slots into a broader wellness routine, sometimes alongside a vitamin d supplement.

Iodine (from kelp), Atlantic Kelp (Ascophyllum nodosum) (standardized to 0.4% iodine), Iodine (from kelp), Atlantic Kelp (Ascophyllum nodosum) (standardized to 0.4% iodine)

• GTIN: 87614117454
• Manufacturer: Swanson
• Categories: KelpMineralsOut of stockSeaweed SupplementsSwansonThyroid Supplements
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

Take one tablet daily with water, preferably with a meal. Store in a cool, dry place away from direct sunlight. Keep out of reach of children. Consult your doctor before use if you are pregnant, nursing, taking medication, or have a medical condition. Do not exceed the recommended dose.

Please consult the product packaging for accurate instructions on how to use the product.

*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

The Active Ingredient Is: Iodine (From Atlantic Kelp)

Iodine is an essential trace mineral needed for the production of thyroid hormones that regulate several body functions.

This form comes from Atlantic kelp and provides iodine as the main active ingredient, with kelp acting as the natural source.

What Does Iodine Do?

Iodine helps with normal thyroid hormone synthesis, which supports metabolism and energy production in line with EFSA guidance. Dr. Zimmermann from the University of Basel found that adequate iodine intake helps thyroid hormone biosynthesis and neurodevelopment, reflecting its central role in normal physiology.

Beyond its thyroid role, iodine contributes to overall metabolic regulation through its part in hormone production, a view supported by NHS and EFSA literature on iodine function.

This product isn't intended to diagnose, treat, cure, or prevent any disease.

Swanson Kelp Iodine Source stands as a brand with a well established track record of science‑backed formulations and a heritage dating back to 1969. This enduring presence in the supplement space speaks to a credible approach to sourcing and delivering essential nutrients such as iodine from Atlantic kelp, aligning with our commitment to reliable, evidence‑led products. Swanson’s well recognised standing as a key player in the iodine and kelp segment gives us confidence in selecting them as a partner in this essential mineral support.

The brand is widely recognised for its great value and reliability, underpinned by a history of quality focus and consumer trust. Our evaluation also considers their manufacturing mindset and capacity to deliver consistent and predictable products that meet our safety standards. This is backed by our in‑house assessment team, who scrutinise brands for consistency, traceability and accountability across their supply chain. For transparency about how we check ingredient quality, we reference how we verify ingredient quality and highlight our work with Welzo's healthcare professionals during the vetting process.

Overall, Swanson Kelp Iodine Source is well matched for this supplement, thanks to Swanson’s manufacturing excellence and our expert team’s backing of their quality standards and heritage.