BioStacks
Life Extension

Theanine XR Stress Relief

1 Tablet · 30 servings

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What it does

A combination of 3 label ingredients.

Theanine

Form not confirmedGrade —

May improve sleep quality and responses to short-term stress in adults; evidence remains limited.

Phosphorus

dicalcium phosphateBudget

Supports normal bones and teeth, cell membranes and the storage and use of cellular energy.

Stress & MoodSleep
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Ingredients (3)

IngredientDoseTarget/referenceForm

Calcium

50 mg

Trace amount — not scored

Other ingredients

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

Vegetable StearateLubricant

A plant-derived salt of stearic acid (typically magnesium or calcium) used as a tablet lubricant

Croscarmellose SodiumDisintegrant

Cross-linked cellulose derivative used as a superdisintegrant

GlycerinHumectant

Sweet-tasting liquid used in soft capsules and liquids

Hydroxypropyl CelluloseBinder

An inert modified-cellulose polymer used as a binder, film-former, and disintegrant.

HypromelloseCapsule

Plant-derived capsule material from cellulose

Microcrystalline CelluloseBinder

Plant-derived cellulose used as a binder and filler in supplements

Stearic AcidLubricant

Saturated fatty acid used as tablet lubricant

Lab testing

How to take it

With or without food

On the label

Take one (1) tablet daily, or as recommended by a healthcare practitioner.

Price check

$21.00

$0.70 / serving

$10$20$50

Near the median of 101 theanine 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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