Spirulina (Arthrospira platensis) is a blue-green cyanobacterium — technically not a plant but a photosynthetic microorganism that thrives in warm, alkaline freshwater lakes. It is 60–70% protein by dry weight, making it one of the most protein-dense whole foods known. Spirulina contains all essential amino acids, B vitamins (B1, B2, B3), bioavailable iron, and phycocyanin — a blue pigment unique to cyanobacteria studied for its antioxidant properties.

Chlorella (Chlorella vulgaris) is a single-celled green freshwater microalga with the highest chlorophyll concentration of any known plant or algae. It is 50–60% protein by dry weight with a complete amino acid profile. Chlorella contains a unique compound called Chlorella Growth Factor (CGF) — a complex of nucleic acids, amino acids, vitamins, and minerals produced during its rapid cell division cycle of four new cells every 20–24 hours. Sea of Greens uses cracked cell wall chlorella for proper nutrient accessibility.

What are the benefits of sea vegetables?

Sea vegetables are among the richest natural sources of organically bound iodine, essential for thyroid hormone production (T3 and T4). They also contain fucoidan, a complex sulfated polysaccharide studied for immune function support, and fucoxanthin, a carotenoid with antioxidant properties. Unlike land greens such as spinach and kale, sea vegetables contain virtually no oxalates — compounds that bind to calcium and reduce mineral absorption. Sea of Greens sources its sea vegetables from clean ocean environments.

How do I take Sea of Greens?

Follow the serving size listed on the Sea of Greens product label. The formula combines sea vegetables, spirulina, chlorella, and land greens into a single daily serving in capsule form — no smoothie or blending required. Take consistently as part of your daily routine for best results.

Why does Sea of Greens combine sea vegetables with freshwater algae?

Sea vegetables and freshwater algae deliver complementary nutritional profiles from different ecosystems. Sea vegetables provide iodine, marine polysaccharides like fucoidan, and ocean-derived trace minerals. Freshwater algae (spirulina and chlorella) deliver concentrated protein (60–70% and 50–60% by dry weight respectively), chlorophyll, and unique compounds like phycocyanin and Chlorella Growth Factor. Both are oxalate-free, meaning their minerals are fully available for absorption.

What makes Nature's Health Supply different from other supplement brands?

Nature's Health Supply focuses on high-purity, clinically studied ingredients at meaningful doses. Every product uses non-proprietary formulas with no filler herbs, is 3rd party lab tested, and is made in the USA in clean vegetable capsules. The company has been in operation since 2001 and offers a 60-day money-back guarantee on all products.

Are Nature's Health Supply products 3rd party tested?

Yes. Every Nature's Health Supply product is independently tested by a third-party laboratory for purity, potency, and safety. Certificates of Analysis are available upon request by contacting customer service at hello@natureshealthsupply.com or (877) 965-2140.

Do you offer volume discounts or subscriptions?

Yes. All products offer multi-bottle volume pricing with savings up to 20% per bottle on larger quantities. A subscribe-and-save option provides 10% off every recurring order with flexible delivery schedules that can be modified or canceled at any time.

What is your return policy?

Nature's Health Supply offers a 60-day money-back guarantee on all products. If you are not completely satisfied, return the product within 60 days for a full 100% refund less shipping costs. This guarantee has been in place since the company's founding in 2001.

1 4

Sea of Greens

Name: Sea of Greens
Brand: Nature's Health Supply
SKU: sea-of-greens
Price: 41.95 USD
Availability: InStock
Rating: 4.75 (4 reviews)

Sea of Greens

7-species sea vegetable blend — 100% oxalate-free.

$41.95

Sale Sold out

Choose Quantity:

Buy 1 Bottle $41.95/ea

Buy 2 Bottles $40.95/ea Popular

Buy 3 Bottles $39.95/ea Best Value

Buy 6 Bottles $38.95/ea

Purchase Options:

One-Time Purchase

Sea Of Greens Contains 5 Species of seaweed (Bladderwrack, Wakame, Rockweed, Sea Lettuce and Dulse) + 2 species of freshwater algae (Spirulina & Chlorella). It is a rich source of organically bound vegetable iodine as well as fucoidan. Each bottle contains (180) vegetable capsules (a 30 day supply).

DETAILS & BENEFITS

7 species of seaweed and freshwater algae
100% oxalate-free — unlike land-based greens
Rich in natural iodine for thyroid support
Packed with trace minerals and micronutrients
Supports natural detoxification
Supports immune system function
Non-GMO, vegetable capsule

INGREDIENTS & SUPPLEMENT FACTS

Proprietary Sea Vegetable & Algae Blend — 7 species including kelp, dulse, bladderwrack, spirulina, chlorella, Irish moss, and nori

Rich in natural iodine, iron, calcium, magnesium, and trace minerals

Capsule: Vegetable capsule

HOW TO USE

Take 2 capsules daily with a meal. Can be taken morning or evening. For best results, take consistently as part of your daily wellness routine.

SHIPPING & RETURNS

Free shipping in the US on orders over $99.

Orders ship within 1-2 business days via USPS.

View full details

Unlock the power of the ocean

✦ Non-GMO Sourcing ✦ 3rd Party Lab Tested ✦ 24/7 Support ✦ Oxalate-Free Formula ✦ Made in USA ✦ Trusted Since 2001 ✦ Non-GMO Sourcing ✦ 3rd Party Lab Tested ✦ 24/7 Support ✦ Oxalate-Free Formula ✦ Made in USA ✦ Trusted Since 2001

Only the best ingredients, formulated for you

A powerful blend of sea vegetables and freshwater algae

Bladderwrack

Iodine-rich brown seaweed that supports healthy thyroid function, metabolism, and natural energy production.

Wakame

Mineral-dense Japanese kelp rich in fucoxanthin, supporting cardiovascular health and healthy inflammatory response.

Spirulina

Blue-green microalgae packed with protein, B-vitamins, and phycocyanin for immune support and natural detoxification.

Chlorella

Freshwater algae renowned for its chlorophyll content, supporting natural detox and cellular repair.

Dulse

Iron and potassium-rich red seaweed from the northern Atlantic, supporting blood health and electrolyte balance.

Rockweed

Nutrient-dense brown algae providing a broad spectrum of trace minerals and natural antioxidant compounds.

Sea Lettuce

Bright green seaweed loaded with magnesium, calcium, and iron — a natural multi-mineral from the ocean.

The Science Behind Sea of Greens

The ocean's most powerful superfoods — without the oxalates.

Oxalate-Free Advantage

Unlike spinach, kale, and other land greens loaded with oxalates, sea vegetables are naturally oxalate-free. Oxalates bind to calcium in the body, reducing mineral absorption and potentially causing calcium buildup where you don't want it. Sea of Greens delivers all the greens nutrition without the downsides.

7 Species Blend

A comprehensive blend of kelp, dulse, bladderwrack, spirulina, chlorella, Irish moss, and nori — each selected for its unique nutrient profile.

Learn More

Natural Iodine Source

Sea vegetables are one of nature's richest sources of iodine — essential for healthy thyroid function, metabolism, and energy production.

Pristine Water Sourcing

Our seaweed and freshwater algae are harvested from clean, pristine waters — tested for purity and free from heavy metals and contaminants.

What our customers say

★★★★★

“I've tried spirulina and chlorella separately before, but Sea of Greens is on another level. Seven species in one capsule and no oxalates. I take it every morning and my energy throughout the day has been noticeably better.”

— Linda M., San Diego, CA

★★★★★

“I was looking for a clean, natural source of trace minerals and iodine to support my daily wellness routine. Sea of Greens checks every box. Simple to take, and I feel great when I'm consistent with it.”

— Tom B.

★★★★★

“I switched from a land-based greens powder to Sea of Greens after learning about oxalates. The difference is real. No bloating, no stomach issues, and I feel like I'm actually absorbing the nutrients. Clean product, clean company.”

— Patricia H., Melbourne, FL

Frequently Asked Questions

What are oxalates and why should I avoid them?

Oxalates are naturally occurring compounds found in many land-based greens like spinach, kale, and Swiss chard. In high amounts, oxalates can bind to calcium and other minerals, reducing nutrient absorption and potentially contributing to kidney stones and joint discomfort. Sea vegetables are naturally free of oxalates, making Sea of Greens a safer way to get your daily greens.

What are the 7 species in Sea of Greens?

Sea of Greens contains a carefully selected blend of kelp, dulse, bladderwrack, spirulina, chlorella, Irish moss, and nori. Each species brings a unique nutrient profile — from iodine-rich kelp for thyroid support to chlorella's detoxification properties — creating a comprehensive sea vegetable superfood complex.

Can this replace my daily multivitamin?

Sea of Greens is an excellent complement to your daily nutrition, providing a broad spectrum of trace minerals, natural iodine, and micronutrients that many multivitamins lack. While it delivers nutrients in their natural, whole-food form for superior absorption, we recommend it as a powerful addition to — rather than a replacement for — a balanced diet and any supplements recommended by your healthcare provider.

Is this safe for people with thyroid conditions?

Sea of Greens contains natural iodine from sea vegetables, which supports healthy thyroid function. However, if you have a pre-existing thyroid condition (such as hyperthyroidism or Hashimoto's) or are taking thyroid medication, we strongly recommend consulting your healthcare provider before starting any iodine-containing supplement.

How is this different from spirulina or chlorella supplements?

Most spirulina or chlorella supplements contain just one or two algae species. Sea of Greens combines 7 different species of seaweed and freshwater algae, each contributing unique nutrients and health benefits. This comprehensive blend provides a far wider spectrum of trace minerals, vitamins, and bioactive compounds than any single-species supplement can offer.

What is sea vegetation and what is its history?

Seaweed is a nutritious and multi-talented vegetable that has been used for thousands of years. It is a type of algae that came into existence about three and a half billion years ago, with colonies starting to grow about 1 billion years ago.

Seaweed has been a staple in Japanese and Chinese diets since prehistoric times. In 600 BC, Sze Teu wrote in China, "Some algae are a delicacy fit for the most honored guests, even for the King himself." Some 21 species are used in everyday Japanese cookery, six of them since the 8th century. Seaweed accounts for roughly 10% of the Japanese diet.

What if it doesn't work for me?

Contact us if you're not satisfied and we'll make it right. We've been standing behind our products since 2001.

Your cart is empty

Cart

Estimated total

Sea of Greens

Sea of Greens

DETAILS & BENEFITS

INGREDIENTS & SUPPLEMENT FACTS

HOW TO USE

SHIPPING & RETURNS

Benefits