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Jarrow Formulas L-Tyrosine 500 mg bottle
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Jarrow Formulas L-Tyrosine 500 mg Review

Jarrow Formulas L-Tyrosine Caps supports synthesis of brain neurotransmitters. Each capsule contains 500 mg of L-Tyrosine.

Product Focus: Thyroid HealthAlso covers:Hormones
Tier ⓘ
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Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
Members
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
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Biohacker Mentions
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Cost per month
$5
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Study, Trial or Testing Result Summary

MembersHuman studies

Evidence that tyrosine supports thyroid in people is very . In a placebo-controlled study, eight adults took single doses of tyrosine by mouth. …

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Review Totals and Summary

Members5,141 reviews
5,141 reviews · IHerb 4,479 · Amazon 651 · Jarrow Formulas 6 · Walmart 4 · Sprouts 1

Jarrow Formulas L-Tyrosine 500 mg has garnered approximately 5141 ratings across various stores, with star-rated reviews giving it 4 or 5 stars, indicating a reception overall. **What it did for buyers** users report in cognitive function and mood. They experienced "mental clarity, focus, and mood balance," noting "sharper concentration, mood, and energy levels" throughout the day, especially during stressful periods. …

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Biohacker Summary

MembersWhat our biohacker panel says

Four or use it, mainly for focus, mood, and dopamine support, and some also mention thyroid support or after sleep. Doses given are 500 milligrams in the morning, often in capsules and sometimes with coffee or another focus supplement, plus a 500 to 1,000 milligram range and one suggestion of 2 grams during calorie eating. …

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RAL Summary

MembersThe tier and why

This product is placed on the strength of its reviews: 5141 counted reviews are . Human study support for thyroid is thin, with one single-dose hormone study at much higher doses and one survey that gave supplement.

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More Details

MembersBody systems · Combine with · Possible side effects

Body systems: Endocrine system. Combine with and possible side are for members.

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Supplement Facts

L-Tyrosine 500 mg
Supplement Facts
Serving Size 1 Capsule
Servings Per Container 100
Amount Per Serving% Daily Value
L-Tyrosine500 mg†
† Daily Value not established.

Directions: Adults take 1 capsule once a day on an empty stomach, immediately after arising in the morning, preferably with juice or as directed by your qualified healthcare professional.

Barcode (UPC) 790011150015 · Label source: the brand's label · Report a label change

Where to Buy

Amazon · iHerb · Walmart
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We sell no supplements. Prices change; check the store.

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Our articles on this subject

Graded October 23, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.