The DHA Science Guide: Advanced Sunless Tanning Education

The sunless tanning education you wish came with your certification — or your self-tanner. This digital guide breaks down the real science behind darker, longer-lasting, more predictable tans: DHA %, skin behavior, formula design, guide color, hydration, fade, and why results can vary from person to person. Created by Julie Koritko, founder and product developer of GlowPro Tans, licensed esthetician, and sunless industry educator, this guide bridges the gap between cosmetic chemistry and real-world tanning results. Inside, you’ll learn: Why higher DHA % matters — and where it starts to plateau Why 14% DHA is considered an upper practical range for full-development formulas How rapid tans, wear time, and “marinating” actually work Why violet/green undertones and instant bronzers don’t control your final tan What ingredients like EDG, erythrulose, glycerin, sodium PCA, and propanediol actually do Why tans fade patchy, why body wash gets blamed too much, and what really affects longevity How different areas of the body develop and fade differently How to troubleshoot results like a pro instead of guessing This is not basic “exfoliate and moisturize” tanning advice. It’s advanced, practical education for spray tan artists, salon owners, mobile artists, and serious self-tanners who want to understand what actually moves the needle. After purchase, your digital download link will be automatically sent to your email inbox. Better understanding = better tans.