The Simple research journal

Better choices start
with better questions.

Ingredient research, device specifications and practical routine guidance—translated without the hype.

Body Care / Collections · 2 min read

Body Cream vs. Lotion: Which Texture Fits Dry Skin?

The difference is more than packaging. Compare texture, climate, routine and the degree of dryness before choosing a body moisturizer.

Skin Care · 3 min read

A clear-eyed guide to copper tripeptide-1, the gap between laboratory promise and clinical proof, and what to compare before choosing a formula.

Hair Care / LED Light Therapy Devices · 2 min read

A research-grounded checklist for comparing light-based hair devices, from regulatory status and protocol to fit and realistic expectations.

LED Light Therapy Devices / Skin Care · 2 min read

Wavelengths, treatment time, fit and evidence matter more than mode count. Use this buyer’s framework before purchasing an at-home LED mask.