ATIKA Journal — The Science of Skin Longevity

Collagen Decline by Decade: 20s, 30s, 40s, 50s+

A clinical overview of how collagen structure changes across decades -- from the 20s through the 50s+ -- and how UV exposure, hormones, oxidative stress, and foundational skin nutrition influence l...

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.

Collagen Types in Skin: Type I vs Type III Explained

A clear, evidence-based guide to the collagen types found in human skin—especially type I and type III—what they do, how they change with age, and how foundational skin nutrition supports the derma...

What Is Collagen? A Plain-Language Guide for Skin

A clear, evidence-based explanation of what collagen is, where it sits in the skin, how its structure changes with age and UV exposure, and why type I and III collagen matter most for visible firmn...