NOW Foods Kelp, Pure Powder is kelp powder that provides a clean and organic source of iodine to back thyroid health. Certified organic and made in a GMP facility, it's straightforward and free of fillers. NOW Foods has been family owned since 1968, delivering trusted quality you can rely on. Iodine helps with thyroid hormone synthesis, an easy way to support energy and metabolism.

Available Sizes & Variants:

227 grams kelp powder - Pure, organic kelp powder for daily use.

Benefits & Features:

• Pure kelp powder delivers a straightforward, single ingredient supplement with no fillers.
• Iodine helps thyroid hormone synthesis.
• Certified organic and produced in a GMP facility for quality you can rely on.
• Non-GMO and suitable for vegetarian and vegan diets, with allergen controls in place.
• Star ingredient Laminaria seaweed is harvested in pristine cold waters, preserving its natural nutrient profile and iodine content while strict quality controls keep purity throughout production.

NOW Foods has built a trusted wellness heritage since 1968. This kelp powder uses organic Laminaria seaweed from cold ocean waters and is USDA Organic certified with no additives. Made in a GMP facility, it keeps quality tight. A pure, single ingredient option that slots easily into daily routines, aligning with NOW Foods’ broader line—which includes liver health supplements, organic protein powder, and best vitamin d supplement options.

Iodine, Kelp (Laminaria spp.) (Whole Plant)

• GTIN: 733739026767
• Manufacturer: NOW Foods
• Categories: KelpNOW FoodsSeaweed 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 1 level scoop daily, preferably with a meal. Store in a cool, dry place, away from direct sunlight and at temperatures not exceeding 25 degrees Celsius. Keep out of reach of children. Do not exceed the recommended daily dose. Supplements are not a substitute for a balanced diet.

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

Iodine is an essential trace element that supports the (hormone production) of thyroid hormones, which help regulate metabolism and growth as part of normal bodily functions.

This form is (sourced from) kelp powder and is (produced in) a GMP-certified facility; the kelp is certified organic and (provided as) a single-ingredient, additive-free powder for clarity in source material.

What Does Iodine Do?

Iodine (takes part in) thyroid hormone synthesis to support normal metabolism, and EFSA recognises its role in maintaining thyroid function and energy balance. NHS guidance also notes iodine contributes to the proper functioning of the thyroid system as part of standard nutrition guidance.

This description reflects (usual) physiological roles and does not imply any disease outcomes.

NOW Foods sits alongside Welzo's strict brand partner criteria, prioritising proven heritage, breadth of industry standing and a transparent, quality‑driven approach. NOW Foods has been family‑owned since 1968, showing long‑standing roots in the dietary supplement sector and established supplier relationships that support steady sourcing and reliability. The brand runs a GMP Quality Assured facility and holds USDA Organic certification through QAI, underscoring a commitment to high manufacturing standards and organic handling. This mix of experience and certification is central to why NOW Foods was chosen as our supplier for kelp powder.

When it comes to product quality, NOW Foods offers a single‑ingredient kelp powder with no fillers, delivering clear ingredient transparency and allergen cross‑contamination information. The kelp is sourced from Laminaria in chilly ocean waters and is verified as Organic, Non‑GMO, kosher, and suitable for vegetarians/vegans, reinforcing our confidence in both provenance and purity. For shoppers, the 450 mcg iodine per daily serving highlights the precise, measured formulation we value, with awareness of the iodine content backing thyroid health concepts as noted in the research into the product. Learn more about our quality assurances at how we verify ingredient quality, and connect with our team of medical experts.

Ultimately, this partnership mirrors Welzo’s brand evaluation process: a commitment to credible manufacturing, traceable sourcing, and transparent testing practices, all delivered through NOW Foods’ long‑standing expertise and quality focus.