Threonine

Threonine is an essential amino acid, meaning the body cannot produce it and it must be obtained through diet. In cosmetic formulations, threonine acts as a humectant, helping to attract and bind moisture to the skin. It is also a building block for proteins like collagen and elastin, which are crucial for skin structure and elasticity.

BenefitModerate 1.7 / 4

Hydration i2.5 / 4

Whether the ingredient helps increase the skin’s water content — humectants that attract water, ingredients that reduce water loss, or ones that make skin feel less dry.

Soothing i0.5 / 4

Whether it can calm the skin — linked to less redness, irritation, discomfort, or visible reactivity.

Texture i0.5 / 4

Whether it can improve smoothness and surface texture — roughness, flaking, clogged pores, or unevenness. Exfoliating acids, retinoids, and smoothing moisturizers may score here.

RiskVery low 0 / 4

Rated by SpottyLabs' ingredient methodology, independent of brands.

What it helps with

• attracts and retains moisture
• supports skin hydration
• component of skin proteins

Products with Threonine

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Frequently asked questions

What role does threonine play in skincare?

Threonine is an amino acid that functions as a humectant, drawing moisture into the skin to improve hydration. It is also a vital component in the synthesis of proteins like collagen and elastin, which are important for maintaining skin's firmness and elasticity.

Is threonine beneficial for aging skin?

As a precursor to collagen and elastin, threonine can indirectly support skin's structural integrity, which is beneficial for aging skin. Its humectant properties also help to keep skin hydrated, which can reduce the appearance of fine lines.