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Head-to-head evidence comparison — which supplement is right for you?
Elderberry wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Likely helps
5 of 5 studies with measurable effects showed benefit.
Top outcomes
Verdict
Mixed evidence
4 of 12 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (1)
Outcomes where both Elderberry and Iodine have evidence — compare verdict strength side-by-side.
600-900mg extract daily during illness
At first sign of symptoms, Multiple times daily during illness
Standardized extract (syrup or capsules)
150-300mcg for maintenance; higher only if deficient under supervision
Any time with food
Potassium iodide (most common and studied)
When taken at symptom onset
During illness
4-12 weeks
4-8 weeks
Genus Sambucus: Exploring Its Potential as a Functional Food Ingredient with Neuroprotective Properties Mediated by Antioxidant and Anti-Inflammatory Mechanisms
International journal of molecular sciences (2024) · Systematic review
In vivo studies using animal models of neurodegenerative diseases, such as Alzheimer's and Parkinson's, have shown that Sambucus compounds can improve cognitive function, motor performance, and neuronal survival while attenuating neuroinflammation and oxidative damage.
Label compliance for ingredient verification: regulations, approaches, and trends for testing botanical products marketed for "immune health" in the United States
Critical reviews in food science and nutrition (2024) · Systematic review
Meanwhile, consumers showed increased attention to dietary supplement ingredient labels, especially concerning authenticity and ingredient claims.
Select Dietary Supplement Ingredients for Preserving and Protecting the Immune System in Healthy Individuals: A Systematic Review
Nutrients (2022) · Systematic review
Immune health products represent approximately 10% of all US dietary supplement sales.
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.
Based on limited studies showing 2-4 day reduction in illness duration. Evidence primarily from small RCTs with methodological limitations. Effectiveness may vary significantly between individuals.
Based on meta-analyses showing urinary iodine concentration increases with supplementation. Effects only meaningful in iodine-deficient populations. Excessive intake (>300mcg) may increase thyroid cancer risk. Most studies used potassium iodide; kelp-derived forms have variable bioavailability.
AI-estimated from published studies. Interpret as directional guidance.
Elderberry has a higher evidence score (6/10 vs 8.5/10) and wins in 2 of 3 categories.
No known interactions between Elderberry and Iodine have been documented in our database. However, always consult a healthcare provider before combining supplements.