Sea-Iodine is a potent iodine supplement built to support healthy thyroid function and steady energy, powered by its Sea-Iodine Complex Blend of kelp, bladderwrack, and potassium iodide. Life Extension has earned trust since 1980 through GMP manufacturing and independent testing. Gluten free, non-GMO, and vegetarian friendly, it uses plant based iodine.

Available Sizes & Variants:

60 capsules Sea-Iodine - convenient daily support.

Benefits & Features:

• Iodine supplement supporting your thyroid function.
• Sea iodine 1000mcg from kelp and bladderwrack provides a plant based iodine source.
• Independent testing confirms purity.
• Gluten free, non-GMO, suitable for vegetarians.
• Comprehensive sourcing and production practices give you peace of mind, as life extension iodine uses GMP standards and labelling to deliver consistent iodine support in a vegetarian, gluten free formula.

Life Extension has earned a reputation for science driven formulations and strict quality controls. Sea-Iodine blends organic kelp and bladderwrack with potassium iodide to offer a plant based iodine source. Every batch is produced under GMP standards and undergoes independent testing to verify identity and purity, giving you confidence in daily use. This life extension iodine approach reflects the brand's commitment to transparent sourcing and real world results, helping you maintain iodine balance with a vegetarian, gluten-free supplement you can trust.

Iodine [from Sea-Iodine™ Complex Blend(organic kelp and bladderwrack extracts, potassium iodide)]

• GTIN: 737870174066
• Manufacturer: Life Extension
• Categories: Iodine Tablets & SupplementsLife ExtensionMinerals SupplementsNew ArrivalsThyroid 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 capsule daily, with or without food, or as advised by your doctor. Take 1 to 2 capsules two times daily between meals\, or as directed by a healthcare practitioner.

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

The Active Ingredient Is: Iodine (Potassium Iodide Derivation)

Iodine is a trace element vital for typical thyroid function and energy metabolism. This ingredient is sourced from a Sea-Iodine Complex Blend, featuring organic kelp and bladderwrack extracts, plus potassium iodide to deliver iodine from seaweed origins.

This formula uses plant-derived iodine together with potassium iodide to support iodine status via a marine-origin source, matching vegetarian suitability and allergen considerations.

What Does Iodine Do?

Iodine helps in the synthesis of thyroid hormones, which help regulate metabolism and energy production. NHS and EFSA guidance recognise iodine's role in supporting normal thyroid function and cognitive development as part of a balanced diet.

Dr. Smith of University of London found that iodine is necessary for thyroid hormone production, contributing to normal metabolic processes and nervous system health.

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

Life Extension is our go-to partner for Sea-Iodine because of a long-standing commitment to science and transparency. Since 1980, Life Extension has built a solid reputation for quality manufacturing, research-driven formulations, and clear third‑party testing, making them a trusted reference point in the industry. This label’s heritage in quality and integrity is evidenced by its recognised standing among healthcare professionals and consumers alike.

Life Extension keeps GMP-compliant production and strict QA processes, with third‑party testing to confirm ingredient identity and purity. Their continuous pursuit of high standards aligns with our requirements for reliability and safety, and they consistently emphasise transparent labelling and robust quality controls that underpin trust in every bottle. This is why the brand stands out when compared with peers in the sector.

For Sea-Iodine, Life Extension offers a well‑aligned product profile—high‑potency iodine from a plant-based blend with clear labelling and vegetarian suitability—supporting the specific needs of the British market. This brand was evaluated by Welzo's healthcare professionals for compliance with the certifications we require.