Ingredient

Phenylalanine

Neutral in 2

What is Phenylalanine?

Phenylalanine is an essential amino acid, meaning the body cannot produce it on its own and must obtain it from food. It is a building block of proteins, commonly found in dairy products, meats, fish, eggs, and some nuts and seeds.

In the body, phenylalanine is used in the production of neurotransmitters, such as dopamine, norepinephrine, and epinephrine, which are vital for mood regulation and cognitive function. The evidence on phenylalanine's health effects is mixed, with some studies suggesting benefits for mood and mental alertness, while others outline risks for individuals with phenylketonuria (PKU), a genetic disorder.

When listed on product labels, it's often in context of providing cognitive or mood benefits, particularly in supplements. Individuals with PKU should avoid it as their bodies cannot properly metabolize phenylalanine.

Commonly found in: supplements, foods, beverages, gums, dietary products

What to watch

High dietary intake is risky for individuals with phenylketonuria (PKU), leading to harmful levels in the body.

Benefits

Supports the production of neurotransmitters that may enhance mood and mental function.

FDA

The FDA regards phenylalanine as generally recognized as safe (GRAS) when used in moderation.

Research

While some research highlights the benefits in mood support, caution is advised for certain populations like those with PKU.

Vegan

Phenylalanine is not animal-derived and is generally accepted as vegan-friendly.

Sources: GRAS Substances (SCOGS) Database

Scout's take

Phenylalanine is an amino acid that helps to improve skin hydration and elasticity. It is used in formulations to support skin repair and regeneration. It is generally considered safe for use in skincare.