Vitamin B3, B5, and Vitamin C Differences in Skin Penetration and Formulation Stability

This educational document explores the fundamental differences between Vitamin B3 (niacinamide), Vitamin B5 (panthenol), and Vitamin C, with a clear focus on how each ingredient behaves within the skin and within a formulation.

Rather than grouping these vitamins together under generic “multivitamin” claims, this resource breaks down their distinct penetration pathways, biological roles, and stability considerations, helping formulators and brand owners understand why performance, tolerability, and shelf life can vary so significantly between products.

Ideal for formulators, small brands, and students of cosmetic science, this document provides a science-based perspective on ingredient selection, formulation design, and realistic expectations, without marketing myths or oversimplification.