ATIKA Journal — The Science of Skin Longevity

Carotenoid Supplements for Skin: What Human Studies Actually Show

Carotenoids such as beta-carotene, lycopene, lutein, and zeaxanthin accumulate in the skin and influence how it responds to UV and oxidative stress. This overview summarizes what controlled human s...

Astaxanthin for Skin: What Human Clinical Studies Show

Astaxanthin is one of the few antioxidant ingredients with controlled human data in skin. This article reviews how oral astaxanthin supplements affect elasticity, wrinkles, hydration and UV-induced...

Internal vs Topical Antioxidants for Skin: What Each Can and Can’t Do

Topical antioxidants defend the skin’s surface, while internal antioxidant supplements support deeper layers and systemic oxidative stress. This guide explains how both fit together using evidence ...

How Do Internal Skin Nutrition and Topicals Work Together?

Internal skin nutrition and topical skincare work on different layers of the same organ. This article explains how each approach affects key pathways in the skin and how to combine them in a measur...

Ceramides vs Hyaluronic Acid: Which Actually Repairs the Skin Barrier?

Ceramides and hyaluronic acid aren’t interchangeable. Hyaluronic acid pulls water in; ceramides keep it from escaping. Understanding that difference is key to long-term hydration and barrier repair.

Collagen & Gut Health: Understanding the Gut–Skin Axis

Struggling with breakouts, dullness, or bloating? The gut–skin axis plays a major role. Learn how digestion, collagen metabolism, and inflammation interact — and why supporting gut health can stren...

Collagen Cofactors: Nutrients That Make Collagen Supplements Work

Discover how key vitamins and minerals — collagen cofactors — help your body activate collagen peptides, strengthen skin structure, and improve hydration and repair.

How Perimenopause Accelerates Collagen Loss: Skin Changes After 40

Hormone fluctuations in perimenopause can reduce collagen, alter barrier lipids, and change how skin responds to UV. This article explains the science behind these shifts and how targeted nutrition...

Marine vs Bovine Collagen: What the Science Actually Shows

A clinical comparison of marine and bovine collagen based on human studies. Learn how peptide composition, bioavailability, quality, and cofactors influence collagen outcomes within foundational sk...