Mineral
Iodine
Iodine supports thyroid function, which directly impacts metabolism, energy, and brain clarity — all areas that commonly struggle during menopause. While most women get enough iodine from everyday sources like iodized salt and seafood, thyroid dysfunction becomes increasingly common after 40, making adequate iodine more critical. Testing your thyroid function (TSH, T3, T4) and iodine status gives you real data instead of guessing. Your thyroid will show you exactly what support it needs.
30-second summary
Iodine supports thyroid function, which directly impacts metabolism, energy, and brain clarity — all areas that commonly struggle during menopause. While most women get enough iodine from everyday sources like iodized salt and seafood, thyroid dysfunction becomes increasingly common after 40, making adequate iodine more critical. Testing your thyroid function (TSH, T3, T4) and iodine status gives you real data instead of guessing. Your thyroid will show you exactly what support it needs.
fatigue — mixedbrain fog — mixedweight gain — weakcold intolerance — mixed
Overall: Mixed evidence
Randomised controlled trials
Controlled trials show iodine supplementation improves thyroid function in deficient populations but hasn't been tested specifically for menopause symptoms.
Population studies consistently link adequate iodine intake with better thyroid function and metabolism in women over 40.
Systematic reviews confirm iodine supplementation corrects deficiency and supports thyroid hormone production, but optimal doses for midlife women remain unclear.
Menopause-specific trials
No studies have directly examined iodine supplementation for menopause-related fatigue, brain fog, or metabolic changes.
What we do not know
No studies have specifically tested iodine supplementation for menopause symptoms like brain fog or fatigue. We don't know if women with subclinical thyroid dysfunction during perimenopause benefit from higher iodine intake. The optimal iodine dose for women over 40 with normal thyroid function but menopause symptoms hasn't been established. Most iodine research focuses on severe deficiency or pregnancy, not the subtle changes happening during midlife.
How it is used
Common dose range
150mcg daily (the RDA) unless directed otherwise by a doctor
Notes on dosing
Do not supplement high-dose iodine without medical supervision. If you have Hashimoto's discuss with your doctor before supplementing.
Get it from food first
Food sources are better absorbed than most supplements and come with co-factors that support the same pathways. If you eat two or three of these consistently, you may not need a supplement at all.
Seaweed (kelp)
1 tablespoon dried
Highest natural source, amounts vary widely
Cod
3 oz cooked
99mcg, reliable seafood source
Greek yogurt
1 cup
75mcg, from dairy farming practices
Iodized salt
1/4 teaspoon
71mcg, most common source in US diet
Eggs
1 large
24mcg, from enriched chicken feed
Mediterranean with seafood
Regular fish and shellfish consumption provides steady iodine along with omega-3s for hormone support
Seaweed inclusion
Adding small amounts of nori, wakame, or dulse to meals boosts iodine naturally without mega-doses
What depletes Iodine
Excessive intake of goitrogenic foods (raw cruciferous vegetables, soy, millet) can interfere with iodine utilization. Fluoride and chlorine in water may compete with iodine absorption. Very low-salt diets eliminate the primary iodine source for many women.
Interactions and cautions
No significant interactions noted at recommended doses.
Rose bottom line
"Your thyroid is working harder during menopause, and it needs adequate iodine to keep up. Most women get enough from food, but if you're experiencing persistent fatigue, brain fog, or unexplained weight changes, ask for thyroid testing first. Let the labs guide you — your body's wisdom is more reliable than any supplement guesswork."