Label data · how much l-theanine per serving
L-theanine: mg per serving on every label we carry
L-theanine labels print 100 mg to 400 mg per serving; 200 mg is the amount most products — and most studies — use, often paired with caffeine in 'calm focus' formulas. The table lists the printed amount for every L-theanine product we track.
2 labels we read
- Lowest
- 100 mg
- Median
- 200 mg
- Highest
- 200 mg
L-theanine per serving as printed on the Supplement Facts panel of each product below.
What to check on the label
- Milligrams per serving (200 mg is the common label)
- Whether it's combined with caffeine, melatonin or magnesium — each printed separately
- Capsule vs chewable
L-theanine on each label we carry
Sorted by the printed amount. Tap a row to see it on eBay; the product page has the full label.
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Nutricost L-Theanine 200 mg
L-Theanine: 200 mg per serving
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Questions people ask
How much L-theanine is a normal serving?
200 mg on most labels; some print 100 mg or 400 mg. The number below each product is the printed one.
L-theanine with caffeine — what ratio do labels use?
Common 'calm energy' formulas pair 100–200 mg of L-theanine with 50–100 mg of caffeine; pre-workouts sometimes add it to higher caffeine doses. Read both lines.
Part of the open label dataset (CC BY 4.0) · how we read labels · other ingredients: Creatine monohydrate · Whey protein · Plant protein · Collagen peptides · Magnesium · Melatonin · Ashwagandha · Vitamin D3