ATIKA Journal — The Science of Skin Longevity

Glutathione and Why You Can’t Supplement Your Way to More of It

Glutathione is key inside cells, but supplements rarely reach the skin intact. Learn what actually supports antioxidant balance, collagen, and long-term skin health.

Bemotrizinol FDA Proposal: What It Means for U.S. Sunscreen + Skin Longevity

The FDA’s December 2025 proposal to allow bemotrizinol in U.S. sunscreens could expand consumer access to a widely used global UV filter. This guide explains what bemotrizinol is, how it compares t...

Skin Layers and Longevity: A Functional Guide

Skin is not a single surface but a layered biological system. This functional guide explains how the epidermis, dermal–epidermal junction, dermis, and deeper support tissues change over time — and ...

Collagen & Hormones: Estrogen, Cortisol, Thyroid, Androgens

A clinical explanation of how estrogen, cortisol, thyroid hormones, and androgens influence collagen, dermal thickness, and skin structure—and where foundational skin nutrition fits.

Collagen & Skin Structure: The Complete Guide

Collagen & Skin Structure: The Complete Guide explains what collagen is, how it changes with age, and what human studies show about defined collagen peptides. This article maps collagen’s role ...

Collagen Myths: What the Science Actually Shows

A clear, evidence-based breakdown of common collagen myths and what studies actually show about dose, timelines, internal vs topical support, cofactors, and foundational skin nutrition.

Collagen & Glycation: How Sugar Ages the Dermal Matrix

A clinical explanation of how glycation and advanced glycation end products (AGEs) stiffen dermal collagen, interact with UV and hormones, and where foundational skin nutrition fits within long-ter...

Internal vs Topical Collagen Support: What Each Can and Cannot Do

A clinical comparison of internal collagen peptides and topical skincare, showing how each influences collagen biology through different pathways and how they work together within foundational skin...

Collagen & Menopause: Perimenopause vs Menopause Deep Dive

A clinical explanation of how collagen changes across perimenopause and menopause, how estrogen decline affects dermal structure, and where foundational skin nutrition supports skin longevity.

Collagen Peptides vs Gelatin vs Whole Collagen: What Each Means for Skin

A clinical comparison of collagen peptides, gelatin, and whole collagen — how they differ in structure, absorption, and evidence, and what actually matters for skin.