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Thyroid Care

Terry Naturally
4.7
★ ★ ★ ★ ★
(590 ratings)
Tyrosine 400 mg
Iodine 30000 mcg
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Score62

A focused thyroid formula with a useful tyrosine amount but an extreme iodine dose. The larger supply does not offset the safety concern.

How scoring works
Quantity:120 Capsule(s) • (60 servings)
Goals:

Score 62

A focused thyroid formula with a useful tyrosine amount but an extreme iodine dose. The larger supply does not offset the safety concern.

How scoring works

Also available as

1 option
60 servings Tyrosine 400 mg, Iodine 30000 mcg • 60 Capsule(s) • 30 servings $19.96 ($0.66 per serving)
$25.00($0.41 per serving)
Vitacost
$ 34.36
Daily Vita
$ 25.00
Daily Vita
$ 32.76
Amazon
$ 68.72
Daily Vita
$ 25.00
iHerb
$ 34.36
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Analysis

The serving supplies 400 mg L-tyrosine with iodine in a focused two-ingredient design. Tyrosine may provide a substrate used in thyroid-hormone production.

Iodine is listed at 30,000 mcg per serving, which is far beyond routine nutritional use. A large bottle does not improve suitability when the central dose may destabilize thyroid function.

The formula should be considered only when the label has been verified and a clinician is monitoring thyroid status. It is not a sensible general energy, metabolism, or hair supplement.

Who is it for
  • Adults using iodine under direct medical guidance
  • People who have confirmed the current label
  • Users receiving thyroid laboratory monitoring
Best for
  • Clinician-directed iodine use
  • Targeted tyrosine supplementation
  • Medically supervised thyroid nutrition

Pros

  • Simple two-active formula
  • Discloses 400 mg tyrosine
  • Larger serving supply
  • No proprietary blend

Cons

  • Extremely high iodine amount
  • Unsuitable for casual daily use
  • Narrow formula
  • Potential to worsen rather than improve thyroid-related symptoms

Warnings

  • The 30,000 mcg iodine amount may disrupt thyroid function
  • Do not use without direct clinician supervision
  • Thyroid disease and thyroid medication increase the need for monitoring
  • Confirm the iodine amount and unit on the current package
  • Seek care for new palpitations, tremor, marked fatigue, or neck symptoms

Nutrient quality

49 Lower impact

L-tyrosine is a relevant thyroid-hormone building block, but its amount is modest. The extremely high iodine amount creates a severe safety problem that outweighs the formula’s plausible thyroid rationale.

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Ingredient transparency

79 High impact

Active ingredient amounts and the serving count are clear from the supplied facts. Complete directions, non-active ingredients, and some source details are missing.

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Customer satisfaction

71 High impact

The aggregate rating is strong and supported by a substantial feedback volume. Specific experience details are missing, so recurring problems and purpose fit remain uncertain.

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Value for money

45 Lower impact

The severe iodine excess makes the formula poor value despite a relevant ingredient pairing. The larger supply does not overcome the formula’s weak safe-use value.

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Ingredients

IngredientAmount per serving
Iodine
30000 mcg
L-Tyrosine
400 mg
Gluten Free Adults 18–50 Kosher Dairy Free Sugar Free
Report overview
Tyrosine · 400 mg OverallScore59
B- Active Ingredient Quality & BioavailabilityB- Dose, Safety & Label TransparencyF Value

L-tyrosine is provided in the standard form, but its amount reaches only the threshold-support range. No purity or sourcing evidence is given, and the cost per gram is high. The listed iodine dose is extremely high and may disrupt thyroid function, so people with thyroid conditions or using thyroid medication need clinician oversight before use.

View ingredientView products
Iodine · 30000 mcg OverallScore43
D- Active Ingredient Quality & BioavailabilityF Dose, Safety & Label TransparencyB+ Value

The extremely high iodine amount is unsuitable for routine daily support without direct medical oversight. The iodine form is not disclosed, which limits confidence in absorption and sourcing. L-tyrosine adds a relevant cofactor, while the cost remains moderate.

View ingredientView products
Loading alternative details
77 Performance

Essential Thyroid Nutrition

NutriCology
<p>A more useful ingredient profile provides 150 mcg of iodine, 250 mg of L-tyrosine, zinc, selenium, vitamin B12, and disclosed plant extracts. Compared with the original 30,000 mcg iodine label amount and 400 mg of L-tyrosine, it retains both core ingredients with a much lower iodine amount and broader nutrient support, although the tyrosine amount is lower.</p>
88 Performance

Kelp

NOW
<p>A more useful ingredient profile provides 150 mcg of iodine from organic kelp. Compared with the original 30,000 mcg iodine label amount and 400 mg of L-tyrosine, it offers a clearly disclosed, much lower iodine amount, but does not replace the original tyrosine.</p>
85 Performance

L-Tyrosine 500 mg

Jarrow Formulas
<p>A more useful ingredient profile provides 500 mg of L-tyrosine. Compared with the original 30,000 mcg iodine label amount and 400 mg of L-tyrosine, it provides more listed tyrosine in a focused formula, although iodine is absent.</p>
81 Budget

Iodine+

Codeage
<p>A lower serving cost still provides 250 mcg of nascent iodine. Compared with the original 30,000 mcg iodine label amount and 400 mg of L-tyrosine, the iodine amount is far below the original label amount and the form is named, but tyrosine is omitted.</p>
85 Budget

L-Tyrosine Powder

Source Naturals
<p>A lower serving cost still provides 660 mg of L-tyrosine. Compared with the original 30,000 mcg iodine label amount and 400 mg of L-tyrosine, it raises the listed tyrosine amount in a simple powder, though it provides no iodine.</p>
81 Budget

Icelandic Kelp

Nature's Life
<p>A lower serving cost still provides 225 mcg of iodine from kelp. Compared with the original 30,000 mcg iodine label amount and 400 mg of L-tyrosine, it offers a much lower iodine amount and a simple label, but it does not provide tyrosine.</p>
88 Value

Arctic-Kelp 225 mcg

Country Life
<p>A favorable balance of quality and cost provides 225 mcg of iodine from Arctic kelp. Compared with the original 30,000 mcg iodine label amount and 400 mg of L-tyrosine, it provides a specific iodine source at a much lower listed amount, but it leaves out tyrosine.</p>
85 Value

Best L-Tyrosine 500 mg

Doctor's Best
<p>A favorable balance of quality and cost provides 500 mg of L-tyrosine. Compared with the original 30,000 mcg iodine label amount and 400 mg of L-tyrosine, it improves the tyrosine amount with a simple, fully disclosed formula, while omitting iodine.</p>
49 Value

Thyroid Caps

Solaray
<p>A favorable balance of quality and cost provides 150 mcg of potassium iodide, 100 mg of L-tyrosine, magnesium, zinc, manganese, molybdenum, and bovine thyroid substance. Compared with the original 30,000 mcg iodine label amount and 400 mg of L-tyrosine, it uses a much lower iodine amount and adds several minerals, but tyrosine is lower and the bovine ingredient may not suit everyone.</p>
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