BioStacks
Natural Factors

L-Tyrosine, 500 mg, 60 Vegetarian Capsules

2 Capsules × 3/day

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What it does

A combination of 2 label ingredients.

Tyrosine

Form not confirmedGrade —

In one small trial, L-tyrosine improved vigilance in male soccer players exercising in warm conditions.

Calcium

dicalcium phosphateBudget

Supports the maintenance of normal bones and teeth, muscle function and nerve signaling.

Brain
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Ingredients (2)

IngredientDoseTarget/referenceForm

Calcium

50 mg

Trace amount — not scored

Other ingredients

Magnesium StearateLubricant

A salt of stearic acid used as a lubricant in tablet and capsule production

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

Capsule ShellCapsule

Generic capsule shell where the label does not specify the material. Common materials are hypromellose (HPMC) for vegetarian capsules and gelatin for traditional capsules — both are GRAS-listed and safe. Fish gelatin and pullulan variants also exist.

Lab testing

How to take it

On an empty stomach
Keep it away from protein-heavy meals
Label directs 3 servings — keep one for the morning

On the label

2 capsules 3 times per day or as directed by a health professional.

Price check

$6.97

$10$20

Cheaper than 99% of 38 tyrosine supplements

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from the NIH Office of Dietary Supplements and the National Academies Dietary Reference Intakes (DRI).

This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.

The score analyzes what's on the label: ingredient doses vs. studied ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.

Not medical advice. Consult your healthcare professional.

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