Greenherb supplies a premium, nutrient-dense Kelp Extract, derived from sustainably harvested brown seaweed species including Ascophyllum nodosum and Laminaria japonica, thriving in cold, pristine ocean waters. Our kelp extract is carefully processed using gentle low-temperature drying and milling techniques to preserve its full spectrum of bioactive compounds, including naturally occurring iodine, fucoidan, alginic acid, laminarin, and a broad array of trace minerals (calcium, magnesium, potassium, iron, zinc). This natural kelp powder offers a versatile, clean-label ingredient for thyroid support, metabolic wellness, gut health, and plant biostimulation, serving global nutraceutical, functional food, and agricultural markets.
We support global B2B customers with consistent quality, scalable supply (including bulk kelp powder options), and comprehensive analytical documentation, enabling the development of innovative products that leverage this marine superfood's remarkable nutritional profile.
Naturally Standardized Iodine Content for Thyroid Support – Our sea kelp extract is carefully monitored to guarantee consistent levels of naturally occurring iodine (typically 0.1–0.5%), the essential trace element required for the synthesis of thyroid hormones T3 and T4. This supports healthy metabolic rate, energy production, and overall endocrine function, making it the best kelp powder for thyroid wellness formulations.
Rich in Fucoidan for Immune & Gut Health – Kelp extract contains significant levels of fucoidan, a sulfated polysaccharide extensively studied for its immunomodulatory, prebiotic, and antioxidant properties. This compound supports a balanced inflammatory response and nourishes beneficial gut bacteria, adding functional depth beyond basic mineral supplementation. The kelp extract benefits extend to digestive comfort and immune resilience.
Potent Natural Source of Bioavailable Trace Minerals – Unlike terrestrial vegetables, kelp accumulates minerals directly from seawater, providing a complex matrix of over 60 trace elements in highly bioavailable forms. Our kelp powder delivers calcium for bone health, magnesium for muscle function, potassium for fluid balance, and iron for oxygen transport—all in one marine-derived ingredient.
Supports Healthy Weight & Metabolic Function – The combination of iodine (for thyroid-driven metabolism) and alginic acid (a soluble fiber that promotes satiety) makes kelp extract powder a valuable ingredient for weight management formulations. Alginic acid forms a viscous gel in the stomach, slowing gastric emptying and reducing appetite between meals.
Prebiotic Fiber for Digestive Regularity – Laminarin and alginic acid act as soluble prebiotic fibers, selectively feeding beneficial gut bacteria such as Bifidobacterium and Lactobacillus. This supports regular bowel movements, reduces constipation, and enhances short-chain fatty acid production for colon health.
Sustainably Wild-Harvested & Available in Bulk – Our buy kelp powder options source from certified clean ocean regions (North Atlantic, North Pacific) where seaweed growth is abundant and renewable. We offer both conventional and certified organic grades, with full traceability and heavy metal testing to ensure purity and safety.
Versatile for Human Nutrition & Plant Biostimulation – Beyond human supplements, our kelp extract for plants serves as a potent biostimulant in organic agriculture, enhancing root development, stress tolerance, and nutrient uptake. This dual-market versatility allows manufacturers to serve both health and agricultural sectors.
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Item |
Specification |
Test result |
|
Assay fucoxanthin |
≥10.0% |
10.10% HPLC |
|
Physical Control |
||
|
Appearance |
Orange Fine Powder |
Complies |
|
Odor |
Characteristic |
Complies |
|
Taste |
Characteristic |
Complies |
|
Part Used |
Kelp |
Complies |
|
Loss on Drying |
≤5.0% |
Complies |
|
Ash |
≤5.0% |
Complies |
|
Particle size |
95% pass 80 mesh |
Complies |
|
Allergens |
None |
Complies |
|
Chemical Control |
||
|
Heavy metals |
NMT 20ppm |
Complies |
|
Arsenic (As) |
NMT 2ppm |
Complies |
|
Mercury(Hg) |
NMT0.1ppm |
Complies |
|
Lead (Pb) |
NMT3ppm |
Complies |
|
Cadmium(Cd) |
NMT 1ppm |
Complies |
|
GMO Status |
GMO Free |
Complies |
|
Microbiological Control |
||
|
Total Plate Count |
10,000cfu/g Max |
Complies |
|
Yeast & Mold |
1,000cfu/g Max |
Complies |
|
Coliforms |
Negative |
Negative |
|
E.Coli |
Negative |
Negative |
|
Salmonella sp. |
Negative |
Negative |
Greenherb’s Kelp Extract captures the concentrated nutritional wisdom of the ocean — a brown seaweed that has sustained coastal communities for millennia and is now recognized as one of nature’s most complete mineral supplements. Unlike land-grown vegetables that depend on soil mineral content, kelp draws a full spectrum of 60+ trace elements directly from seawater, including iodine, calcium, magnesium, potassium, and iron, in forms readily utilized by the human body . The key to kelp’s broad benefits lies in its unique polysaccharides — fucoidan for immune modulation, alginic acid for gentle detoxification and satiety, and laminarin as a prebiotic fiber . This makes kelp extract benefits relevant not only for thyroid and metabolic health but also for digestive wellness, weight management, and even plant growth. Our kelp powder is produced from sustainably wild-harvested Ascophyllum nodosum and Laminaria species, processed without harsh chemicals to preserve fragile polysaccharides and volatile trace minerals. Whether you are looking for sea kelp extract for hypothyroid support, bulk kelp powder for functional beverage manufacturing, or the best kelp powder for organic plant fertilizer, our ingredient delivers consistent quality and efficacy.
Botanical Source: Ascophyllum nodosum, Laminaria japonica, or Laminaria digitata
Used Part: Whole Thallus (Seaweed)
Key Active Components: Iodine (0.1-0.5%), Fucoidan (5-15%), Alginic Acid (15-30%), Laminarin (2-10%), Mannitol, Trace Minerals (Ca, Mg, K, Fe, Zn, Cu, Mn, Se)
Standardization: Available standardized to iodine content, fucoidan percentage, or alginic acid level
Appearance: Fine, dark olive-green to brown powder with characteristic marine aroma
Flavor: Mild, salty, ocean-like — distinctive but not overpowering
Solubility: Partially soluble in water; alginic acid forms viscous dispersion; fucoidan is water-soluble
Extraction Ratio: Available as whole seaweed powder (kelp powder) or concentrated extract (10:1, 20:1)
Certifications: Organic, Halal, Kosher, Non-GMO (as required)
Our process is optimized to preserve the delicate polysaccharides and volatile trace minerals:
Sustainable Wild-Harvesting: Kelp is hand-harvested or mechanically cut from certified clean ocean beds during optimal growth seasons (spring/summer) to ensure maximum nutrient content .
Washing & Desalting: Fresh seaweed is thoroughly washed in clean, cold freshwater to remove sand, epiphytes, and excess sodium chloride.
Low-Temperature Drying: The clean kelp undergoes gentle drying using freeze-drying (lyophilization) or controlled low-temperature air drying (below 60°C) to preserve heat-sensitive fucoidan, laminarin, and iodine .
Fine Milling: Dried kelp is milled into a fine, consistent powder using specialized equipment that prevents excessive heat generation.
Extraction (for concentrated extract): For kelp extract powder, the milled material undergoes water or ethanol-water extraction to enrich fucoidan and alginic acid content, followed by concentration and spray drying .
Sieving & Standardization: The powder is sieved to achieve uniform particle size and blended for batch-to-batch consistency in mineral and polysaccharide profile.
Quality Assurance: Each batch is tested for iodine content (ICP-MS), fucoidan (spectrophotometry), heavy metals (lead, arsenic, mercury, cadmium), microbial safety, and moisture content.
Kelp Extract is valued for its comprehensive, scientifically-documented health and agricultural benefits:
Supports Healthy Thyroid & Metabolic Function*: The naturally occurring iodine in sea kelp extract is essential for the synthesis of thyroid hormones T3 and T4, which regulate basal metabolic rate, energy production, and body temperature. Iodine deficiency is a leading cause of hypothyroidism, goiter, and metabolic sluggishness .
Provides Potent Immune Modulation via Fucoidan*: Fucoidan has been shown to activate natural killer (NK) cells, enhance macrophage phagocytosis, and modulate cytokine production, supporting the body's natural defense against pathogens while maintaining inflammatory balance .
Supports Digestive Health & Prebiotic Activity*: Laminarin and alginic acid act as soluble prebiotic fibers, selectively stimulating beneficial gut bacteria (Bifidobacteria, Lactobacillus), improving stool regularity, and producing butyrate for colon health .
Promotes Satiety & Healthy Weight Management*: Alginic acid forms a viscous gel in the stomach, slowing gastric emptying, reducing hunger cravings, and supporting calorie control as part of a balanced diet .
Provides Gentle Detoxification & Heavy Metal Binding*: Alginic acid binds to heavy metals and environmental toxins in the digestive tract, facilitating their excretion and reducing overall toxic burden .
Enhances Skin, Hair, & Nail Health*: The combination of iodine, zinc, selenium, and fucoidan supports hair follicle health, nail strength, and skin elasticity through improved thyroid function and antioxidant protection .
Biostimulant for Plant Health (Agricultural Grade)*: When used as kelp extract for plants, our product enhances root development, improves stress tolerance (drought, frost), increases nutrient uptake, and boosts crop yield in organic farming systems .
Kelp Extract is incredibly versatile across multiple product categories:
Dietary Supplements
Thyroid support and metabolic wellness capsules/tablets
Iodine supplementation for deficiency prevention
Digestive health and prebiotic fiber formulas
Weight management and appetite control complexes
Trace mineral and electrolyte replacement products
Functional Foods & Beverages
Green smoothie mixes and superfood blends
Mineral-fortified protein shakes and meal replacements
Seaweed-flavored snacks and seasoning blends
Agriculture & Horticulture
Organic plant biostimulant and soil conditioner (kelp extract for plants)
Foliar spray and root drench for enhanced crop resilience
Cosmetic & Personal Care
Mineral-rich face masks, serums, and body lotions
Scalp and hair treatments leveraging iodine and fucoidan
Bulk Ingredients for Manufacturing
Bulk kelp powder for large-scale supplement production
Sea kelp powder for functional food formulations
Greenherb is your trusted partner for premium, sustainably-sourced kelp extract. Whether you need sea kelp extract for thyroid support capsules, the best kelp powder for functional beverages, kelp extract benefits for plant biostimulation, or bulk kelp powder for large-scale manufacturing, we provide the purity, potency, and documentation needed for successful product development. Our buy kelp powder options include flexible packaging sizes and competitive pricing for global B2B customers.
Contact us today to discuss your needs, request samples and analytical data, or receive a detailed quote for your project.
Greenherb — delivering the mineral-rich, polysaccharide-powered nutrition of the sea.
