BioStacks
Best for
Ingredients (2)
L-Theanine
100%Dose
200 mg
Target
100–250 mg
Form
—
Green Tea Leaf Extract
100%Dose
200 mg
Target
200–500 mg
Form
—
Other Ingredients (6)
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
Calcium CarbonateBuffer
Common calcium salt used as a buffering agent, filler, or mineral fortification in supplements
Hydroxypropyl CelluloseBinder
An inert modified-cellulose polymer used as a binder, film-former, and disintegrant.
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
How to Take It
Best taken in the morning
Contains caffeine — keep it to the morning. Take with food; high-dose EGCG on an empty stomach stresses the liver.
With food
Keep it away from iron-rich meals
Space it a couple of hours from Iron
On the label
Take 1 tablet 1 to 2 times daily with a meal. Do not take before bedtime.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$9.87
Cheaper than 91% of 65 green tea leaf extract supplements
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and 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. clinical 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.