GlowOver40 Library

Evidence-informed skincare, wellness and beauty guidance — made easier to understand.

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Good to Know

Can a peptide reduce Alzheimer’s risk?

A striking claim has circulated online — but what did the tesamorelin research actually show?

Devices

Red & Near-Infrared Light

LED masks and light therapy at home — what to expect.

Skin Concerns

Skin Barrier

A healthy skin barrier is the foundation of calm, hydrated and resilient skin — and becomes especially important as skin ages.

All articles

Ingredients

Azelaic Acid

A versatile skincare ingredient with documented use for acne, rosacea and uneven pigmentation, among other things.

Worth the Hype?

PDRN & Polynucleotides

Worth the Hype? A review of PDRN serums and creams — what the marketing promises and what research actually supports.

Ingredients

Vitamin C

One of skincare's most established antioxidants — but the formulation matters as much as the name of the ingredient.

Ingredients

Retinol vs Retinal

Two vitamin A forms that can improve fine lines, skin texture and signs of photoaging — but they are not identical.

Ingredients

Peptides

Small building blocks with big promises — but different peptides do different things and the evidence varies.

Ingredients

Ectoin

A quiet barrier-supporting ingredient with promising evidence for hydration and stressed skin.

Devices

Red & Near-Infrared Light

LED masks and light therapy at home — what to expect.

Routine Guides

Neck & Décolletage Care

Extending your routine below the jawline.

Skin Concerns

Skin Barrier

A healthy skin barrier is the foundation of calm, hydrated and resilient skin — and becomes especially important as skin ages.

Good to Know

Can a peptide reduce Alzheimer’s risk?

A striking claim has circulated online — but what did the tesamorelin research actually show?

Routine Guides

Barrier First – The Foundation of an Effective Skincare Routine

The skin barrier is the skin’s outermost protective layer. It helps the skin retain moisture and protects it from irritants and environmental stressors.

Skin Concerns

Why skin recovery slows with age

Skin does not stop repairing itself as we age, but some of the processes involved in renewal and recovery gradually become less efficient.