Mother Earth’s Lugol's Iodine Plus, 90 Capsules

Six-dimension breakdown

Why this scored 55/100

Mother Earth's Lugol's Iodine Plus delivers iodine in the Lugol's format (both molecular iodine I2 and iodide I-). Iodine is genuinely essential for thyroid hormone synthesis, and modest supplementation makes sense for populations with documented deficiency (pregnancy, restrictive diets that avoid iodized salt, seafood, and dairy). However, the framing that 'up to 90% of Americans may be deficient in iodine' overstates the evidence — surveillance data from NHANES shows median urinary iodine in the sufficient range for the US population, with pregnant women being the identifiable gap. High-dose Lugol's iodine supplementation (5-50 mg elemental iodine daily) exceeds the RDA (150 mcg for adults) by 30-300x and is a known trigger for both hyperthyroidism (Jod-Basedow phenomenon) and hypothyroidism (Wolff-Chaikoff effect) in susceptible individuals with autoimmune thyroid predisposition. The 'Iodine Plus' framing is common in the alternative-health iodine advocacy community but rests on contested claims about pharmacologic iodine's role in health. Safety score is reduced due to real thyroid-disruption risk. Standard-tier for the underlying nutrient; caution warranted on high-dose Lugol's specifically.

Evidence & sources

The Vyvata score's Evidence dimension measures the quality of published RCT support for a product's active ingredients at the label dose. Our source hierarchy: double-blind RCTs in MEDLINE-indexed journals > single-blind RCTs > open-label trials > observational studies > mechanism papers > N=1 case studies (anecdotes). Predatory journals and manufacturer-authored studies without independent replication are weighted down.

Product-specific evidence citations for this item are embedded in the analysis text on the "Analysis" tab. For the full framework and evidence hierarchy, see the methodology page.

How to read the Evidence dimension

• 80–100: Multiple double-blind RCTs in indexed journals directly testing this product OR the exact ingredients at the exact dose.
• 60–79: Single double-blind RCT + supporting ingredient literature at the studied dose.
• 40–59: Open-label trials + ingredient literature; no product-specific double-blind evidence.
• 20–39: Ingredient literature only; no product-specific trials or trials in predatory venues.
• 0–19: No credible evidence base or unverifiable claims.

FAQ data has not been generated for this product yet. See the site FAQ for general questions.

Customer reviews

All the data we have on this product

Every VSF-related metafield surfaced verbatim. Nothing hidden. If you spot data that looks wrong, let us know.

VSF score

55 / 100

Tier

Standard

Category

Supplements

Subcategory

vitamins micronutrients

Last scored

August 29, 2026

Third-party certifications

None on record at time of scoring

Vendor

Ultimate Sport Nutrition

Product type

Mother Earth Labs

Tags

Shopify Collective, Ultimate Sport Nutrition

Every score is set from the published rubric, audit-logged, and rescored whenever new evidence emerges (published trials, updated labels, third-party testing releases). Every vendor is scored on the same criteria — no pay-to-play. See our editorial-independence disclosure for the full policy, including brands with an editorial relationship to this site.