Algae & Sea VegetableBull kelp (Nereocystis luetkeana)
Bull kelp is a nutrient-dense brown macroalgae rich in essential minerals, particularly iodine and potassium. Research highlights its potential as a functional food providing dietary fiber (alginates) and antioxidants (fucoxanthin, phlorotannins). Human evidence is primarily nutritional, supporting its role in mineral supplementation and general metabolic health when consumed in moderation.
Nutrition · estimated · per 100g
40Calories
3gProtein
9gCarbs
0.6gFat
2gFiber
0.6gSugar
Benefits
- Bull kelp is a nutrient-dense brown macroalgae rich in essential minerals
- particularly iodine and potassium. Research highlights its potential as a functional food providing dietary fiber (alginates) and antioxidants (fucoxanthin
- phlorotannins). Human evidence is primarily nutritional
- supporting its role in mineral supplementation and general metabolic health when consumed in moderation.
Key compounds
AlginatesfucoidanphlorotanninsfucoxanthinIodinepotassiumcalciummagnesiumsodiumironvitamin KB vitamins
May help with
- Mineral support
- thyroid support
- antioxidant support
- metabolic support
Best for these goals
Mineral supportthyroid supportantioxidant supportmetabolic support
How to use it
Dried pieces; pickled; fresh; powdered; flakes
Evidence level
Limited
Cautions & interactions
IODINE: Very high — monitor intake, especially with thyroid conditions or medications | Contaminant concerns: Heavy metals (arsenic, cadmium, lead) depending on harvest waters; microbial contamination if improperly dried | High iodine content can cause thyroid dysfunction if overconsumed; caution advised for individuals with thyroid disorders, kidney disease (due to potassium), and pregnant/lactating women. Monitor total iodine intake, especially with thyroid disease, pregnancy, or regular high-dose use. | Interactions: May interact with thyroid medications due to high iodine content; caution with anticoagulants due to vitamin K.
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