Evidence over trend

Cortisol has a rhythm.
So does your skin.

“Cortisol face” has millions of views and no clinical definition. We dig into what stress actually does to your skin, sourced from dermatology and endocrinology research rather than social media claims.

Is “cortisol face” real?Browse all research →

Latest research, plainly explained

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Foundations · 3 min read

The HPA Axis Explained: How Your Brain and Adrenal Glands Talk to Each Other

Cortisol does not appear in a vacuum. Here is the actual signaling chain behind it, and where popular explanations of it tend to go wrong.

Cortisol Skin · 3 min read

Red Light Therapy and Cortisol: What the Skincare Claims Get Right (and Wrong)

Red light devices are sold as both a skin treatment and a stress-hormone fix. The evidence behind those two claims is not close to equal.

Foundations · 6 min read

Allostatic Load: What It Actually Means, and Why It Matters More Than One Cortisol Number

This site talks constantly about "chronic stress," and allostatic load is the actual research framework behind that phrase, distinct from any single cortisol reading.

Cortisol Skin · 5 min read

CBD Oil and Cortisol: Does It Actually Lower Stress Hormones?

CBD is marketed heavily as a cortisol-lowering supplement, and unlike some wellness trends there is real human research on it, though far less than the marketing suggests.

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Foundations

The established science of stress and skin, explained plainly.

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Cortisol Skin

"Cortisol face" is everywhere right now. We separate the trend from the evidence.

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Product Guides

Comparison guides for stress-related skincare categories.