Vitamin A

Vitamin E vs Retinol: Differences, Benefits and How to Use Them Together

By Warren Wan / 2026年8月4日

Vitamin E and retinol are not the same ingredient. Vitamin E is a family of fat-soluble antioxidants commonly used in […]

Vitamin A, Natural Vitamin A, Synthetic Vitamin A, Vitamins

Natural vs Synthetic Vitamin A: Forms, Absorption, Safety and Formulation Guide

By Warren Wan / 2026年7月21日

Quick Answer “Natural” vitamin A is not automatically safer, better absorbed or more effective than “synthetic” vitamin A. The more

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Gensei began from a family owned facility producing animal derived material animal protein peptide in 2006. In 2010, our clients asked us if we could produce the hydrolyzed collagen peptide. From then, the germ has come out. With a burning desire, Collagensei merged into USA, Japan, Australia, New Zealand, Asia and South America markets.