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Head-to-head evidence comparison — which supplement is right for you?
Iodine vs Propolis: they're closely matched on evidence (8.5 vs 5.5/10); the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Iodine and Propolis are closely matched across evidence, studies, and safety.
Verdict
Limited support
1 of 4 studies with measurable effects showed benefit.
Top outcomes
Verdict
Likely helps
4 of 4 studies with measurable effects showed benefit.
Top outcomes
150-300mcg for maintenance; higher only if deficient under supervision
Any time with food
Potassium iodide (most common and studied)
300-600 mg daily (standardized extract). The cited trials used 400 to 600 mg a day. Label products go up to 1,000 mg, above that dose.
With food, Divided doses for higher amounts, Throat spray can be used as needed
Standardized extract (capsules or tincture)
and 2 more not shown
4-12 weeks
4-8 weeks
1-2 weeks
2-4 weeks
1-2 weeks
Acute
Maternal Iodine Status and Birth Outcomes: A Systematic Literature Review and Meta-Analysis
Nutrients (2023) · Meta analysis · n=42269
Birth weight was similar between UIC ≥ 150 μg/L and <150 μg/L (difference = 30 g, 95% CI −22 to 83, p = 0.3, n = 13, I2 = 89%) with no evidence of linear trend (4 g per 50 μg/L, −3 to 10, p = 0.2, n = 12, I2 = 80%).
Iodine fortification of foods and condiments, other than salt, for preventing iodine deficiency disorders
The Cochrane database of systematic reviews (2019) · Meta analysis · n=4317
This is equivalent to an increase of 38.32 µg/L (95% CI 24.03 to 52.61 µg/L).
Systematic review and meta-analysis of iodine nutrition in modern vegan and vegetarian diets
The British journal of nutrition (2023) · Meta analysis · n=4421
Vegan diets had the poorest iodine intake (17·3 µg/d) and were strongly associated with lower iodine intake (P = < 0·001) compared with omnivorous diets.
Dosage exploration of the effects of honey and its derivatives on cardiometabolic outcomes: an overview of systematic reviews and GRADE-assessed updated meta-analysis
Nutrition & diabetes (2025) · Meta analysis · n=3544
Umbrella review and updated meta-analysis of 69 randomised trials with 3,544 participants across honey, royal jelly and propolis together. The abstract does not say how many trials or participants were propolis.
The impact of propolis supplementation on inflammatory biomarkers: A meta-analysis and systematic review of randomized controlled clinical trials
Prostaglandins & other lipid mediators (2024) · Meta analysis · n=1139
The propolis supplementation significantly reduced IL-6 (WMD = -2.48; 95 % CI: -4.62, -0.34; P = 0.023) and TNF-α (WMD = -0.86; 95 % CI: -1.45, -0.26; P = 0.005) compared with control groups.
Potential Effects of Bioactive Compounds of Plant-Based Foods and Medicinal Plants in Chronic Kidney Disease and Dialysis: A Systematic Review
Nutrients (2024) · Systematic review
Systematic review of randomised trials of plant compounds and medicinal plants in chronic kidney disease and dialysis. Propolis was 3 of the trials, beside curcumin (8), sulforaphane, genistein, allicin, beetroot, green tea, rhubarb, astragalus and Tripterygium.
Both Iodine and Propolis are closely matched — the best choice depends on your specific health goals.
No documented interaction was found in the data searched. This does not establish that this exact combination is safe.
Selenium helps; iodine can WORSEN Hashimoto’s. The honest take on "thyroid support".
What’s safe while nursing, the truth about milk-supply herbs, and what to avoid (it passes into milk).
Commonly recommended vs ask-your-clinician vs avoid — a general, safety-first overview.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.