Ingredient Science Explained

Plant Retinol formulas combine bakuchiol with HPR
Anti-aging Bakuchiol Has-faq Ingredient-science Plant-retinol Retinol Sensitive-skin

Bakuchiol vs Retinol: Which Is Better for Sensitive Skin?

Bakuchiol and retinol both target fine lines and collagen production — but they work very differently. Discover which ingredient is right for your skin type, and why HKH combines bakuchiol with next-generation HPR for powerful,...
HKH Plant Retinol Time Capsule
Anti-aging Capsule technology Hpr Ingredient science Plant retinol Sensitive skin Sgs clinical Skincare faq

HKH Plant Retinol Capsules: Ingredients Guide

Discover the science behind HKH Plant Retinol Time Capsule — from SGS-proven clinical results (wrinkles reduced by up to 32.95%) to our patented single-dose capsule technology, Supramolecular Anti-Micellar delivery system, and zero-pore-clogging botanical oil matrix....
HKH Anti-Aging Serum
Anti-aging Collagen Ingredient science Peptides Retinol Serum Vitamin c

Does Collagen Serum Work? An Ingredient Breakdown

Applying collagen doesn't directly replenish your skin's collagen — but that doesn't mean collagen serums are useless. Here's what the science actually says, and what ingredients truly work.