You might have heard about L-theanine from the steady stream of nootropics out there. As supplements, they’re used to quell anxiety, stress, and high blood pressure.
More recently, I’ve seen this ingredient crop up in different skincare products. So, I thought I would do some research to find out if it does anything when applied topically.
But first, a brief definition:
L-theanine is a non-essential amino acid—aka your body’s building blocks—most notably found in green, black, and matcha teas.
One study, performed on mice, found L-theanine worked to calm inflammation when applied topically. Hey, maybe that’s why green tea bags are a common remedy for undereye bags.
Sure, there was one study that praised L-theanine as a skin-booster. But, one study is not enough to draw a clear conclusion—at least not for me.
I’m guessing that, as it becomes more popular (amino acids are trending right now), we’ll see more studies come into play.
- Butyric Acid
What It’s Used In
It’s found in green and black teas. But, in terms of skincare, it’s usually found in matcha face masks. And some night creams.
Although it does possess some skin benefits, you’re better off taking it orally through nootropics or various teas as a means to reduce anxiety.