Top Kelp Supplement Brands for Optimal Health Boost

Kelp supplements have gained popularity for their numerous health benefits, including supporting thyroid function and providing essential nutrients like iodine. With a variety of options on the market, it can be challenging to identify which brands provide the highest quality kelp supplements. Luckily, there are several reputable brands renowned for their commitment to quality and safety standards. To discover the best kelp supplement brands available, please explore the list below.

Illustration of kelp supplement

Best brands of kelp supplement in 2025

Earthrise

Earthrise Nutritional is a prominent player in the kelp supplement market, known for its high-quality products that leverage the nutritional benefits of kelp. The company is part of the broader algae protein market, which is expected to grow significantly, with the global algae protein market projected to reach $4,700.6 million by 2028 at a CAGR of 8.1% from 2022 to 2028. Earthrise Nutritional contributes to this growth by offering kelp products in various forms, such as powder, which accounted for 39.5% of the revenue share in the kelp product market in 2023. Their products are valued for their antioxidant, anti-inflammatory, and moisturizing properties, making them popular in cosmetics and dietary supplements. As the demand for nutritional supplements rises, Earthrise Nutritional is well-positioned to capitalize on this trend.

Nature's Life

Nature's Life is renowned for producing high-quality kelp supplements, particularly their Icelandic Kelp product, which contains 41 mg of kelp and 225 mcg of iodine, providing 150% of the daily recommended intake. This supplement is crucial for supporting healthy thyroid function and is rich in naturally occurring minerals, amino acids, and trace elements. Nature's Life ensures stringent quality control through triple testing at every stage, from raw material to final product, and manufactures in a GMP-certified facility. The company's commitment to purity and potency is evident in their ISO-accredited labs and rigorous testing protocols. With a long-standing reputation, Nature's Life maintains its position as a leader in the supplement industry.

NOW Foods

NOW Foods is a renowned brand for producing high-quality kelp supplements, offering 150 mcg of natural iodine per tablet, which is 100% of the daily recommended value. Their kelp supplements are made from organic kelp (Laminaria spp.) and are designed to support healthy thyroid function. The tablets are smaller and easier to swallow, making them convenient for daily use. NOW Foods has been a family-owned business since 1968 and ensures GMP quality assurance for all their products. The kelp supplements are free from common allergens like yeast, wheat, gluten, and soy, and are manufactured in the USA with globally sourced ingredients.

Solgar

Solgar is renowned as one of the best producers of kelp supplements, particularly with their North Atlantic Kelp Tablets, which are rich in iodine and vitamin K, supporting thyroid health, energy levels, and bone strength. These tablets are vegan, kosher, and responsibly sourced, produced in small batches to ensure freshness. Solgar's commitment to quality is evident in their avoidance of artificial ingredients, flavors, sweeteners, or colors. The kelp supplements are also gluten-free, dairy-free, and sugar-free, making them a versatile option for various dietary needs. With a suggested daily dose of one tablet, Solgar North Atlantic Kelp Tablets offer a convenient way to incorporate the health benefits of seaweed into your diet.

Source Naturals

Source Naturals, though not specifically mentioned in the provided sources, is often recognized for its high-quality supplements, including kelp products. Kelp supplements from reputable brands like Best Naturals, as seen in the sources, are valued for their nutritional benefits, including high iodine content, supporting thyroid function, and providing essential minerals like calcium, magnesium, and iron. These supplements are typically non-GMO, gluten-free, and manufactured in FDA-registered facilities, ensuring purity and quality. The market for kelp products is growing, with a projected CAGR of 6.2% from 2023 to 2032, indicating increasing consumer interest in natural health supplements. However, it is crucial to consult a doctor before using kelp supplements, especially for those with thyroid conditions or other health issues.

Pure Encapsulations

Pure Encapsulations is renowned for its high-quality supplements, including their kelp-based products, which are crafted with precision and care. Their kelp supplements, such as those found in the Thyroid Support Complex, are derived from Ascophyllum nodosum and standardized to contain 0.5% iodine (150 mcg), ensuring optimal thyroid support and overall health. The brand's commitment to quality is evident through their rigorous testing processes, including third-party testing for purity, potency, and safety. Pure Encapsulations' products are made in CGMP-compliant facilities, ensuring adherence to strict quality standards. With a broad range of supplements backed by extensive research and clinical trials, Pure Encapsulations stands out as a trusted provider in the nutritional supplement industry.

Nature's Way

Nature's Way is a renowned brand for producing high-quality kelp supplements, particularly valued for their sustainably sourced kelp from cold water climates like Nova Scotia. Each serving of their kelp supplement contains 600 mg of kelp and provides 270 mcg of iodine, which is 180% of the daily recommended value, supporting thyroid function effectively. Established since 1969, Nature's Way ensures uncompromising quality through their Certified Authentic TRU-ID(tm) and Non-GMO Project Verified certifications. The vegan capsules are free from gluten, sugar, yeast, wheat, soy, corn, dairy products, and artificial colors, flavors, or preservatives. With a long history of commitment to natural health, Nature's Way kelp supplements are a trusted choice for those seeking to enhance their iodine intake. For more details about their kelp supplements, visit the Nature's Way kelp supplement page.

Solaray

Solaray is a renowned brand in the health supplement industry, particularly noted for its high-quality kelp supplements. The Solaray Kelp 550mg supplement is formulated to provide 550 mg of kelp and 400 mcg of folic acid, supporting healthy thyroid function through its rich iodine content. This supplement is non-GMO, vegan, and lab-tested for potency, purity, and identity. With the global kelp protein market expected to grow at an 8.4% CAGR from 2023 to 2033, Solaray's product aligns with the increasing demand for natural and nutritional supplements. The brand's commitment to quality and nutritional value makes it a trusted choice among health-conscious consumers.

Garden of Life

Garden of Life stands out as a premier producer of kelp supplements, offering products that are Certified USDA Organic, Non-GMO Project Verified, and Certified Vegan. Their supplements, such as the Perfect Food Super Green Formula, include kelp as part of a blend of 45 phytonutrient-dense superfoods and 12 sprouted ingredients, providing the equivalent of 140 grams of fresh grass juice per serving. These products also feature 1 billion CFU probiotics from 10 strains to support digestive health. The brand's commitment to using real, nutritious foods ensures high-quality supplements, such as the Organics Women's 40+ Multi, which includes over 30 organic fruits, vegetables, and herbs. With no artificial flavors, sweeteners, or preservatives, Garden of Life's kelp supplements are a reliable choice for those seeking natural nutrition.

MaryRuth Organics

MaryRuth Organics, founded by MaryRuth Ghiyam in 2013, has established itself as a reputable brand in the wellness industry, particularly known for its high-quality, vegan, non-GMO, and USDA-certified organic supplements. The company, which started with just two products - a liquid morning multivitamin and a liquid nighttime multimineral - has grown to offer over 130 products, including iodine drops that support hormone regulation and immunity. MaryRuth Organics' products are formulated with care, using the highest quality ingredients, and have garnered over 12,000 five-star reviews. The brand's commitment to health and wellness is evident in its rigorous testing and compliance with FDA standards. By 2024, the company had achieved significant success, with plans to go public in 2025.