L-theanine
12 productsL-theanine in capsules and powder, alone or with caffeine: milligrams per dose, Suntheanine and price per dose.
L-theanine
L-theanine is an amino acid found in tea leaves (Camellia sinensis); a cup of tea holds a few tens of milligrams. Supplements usually give 100–200 mg per capsule.
Some products state a branded form such as Suntheanine; others simply say L-theanine. It is also sold together with caffeine in one capsule, and those products say how much of each they contain.
Compare the milligrams per dose and the price per dose.
FAQ
Where does L-theanine come from?
It occurs naturally in tea leaves; in supplements it is usually made by fermentation and named on the label.
What is Suntheanine?
A branded form of L-theanine. The label states it when the product uses it.
Why do some products combine it with caffeine?
It is a common pairing in one capsule; the label states the milligrams of both, and caffeine has its own warning on the product page.