Kelp is a large brown seaweed and one of the ocean's most mineral-dense foods. Its primary medicinal application centres on its high iodine content, supporting thyroid hormone synthesis, metabolic rate, and brain development. Beyond iodine, kelp provides fucoidan polysaccharides (antiviral, anti-inflammatory), alginic acid (heavy metal chelation), and a broad trace mineral spectrum. Used in macrobiotic and traditional Japanese medicine as a nutritive food-medicine.
thallus (whole plant)
food, powder, capsule, tea, tincture
1–2g dried powder daily; or 1–2 capsules standardised to iodine content; as food, use in soups and broths regularly
High iodine content — avoid in hyperthyroidism, thyroid cancer, or autoimmune thyroid disease without medical monitoring. Iodine content varies widely between species and suppliers — standardised extracts preferred. May accumulate heavy metals if from polluted waters — source from clean, certified suppliers. Avoid in pregnancy without medical guidance.
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