Health & Wellness
Skincare & Beauty Science Quiz
SPF, retinol, and the truth about your skin — 50 questions about skincare science.
SPF, retinol, and the truth about your skin — 50 questions about skincare science.
The Skincare Quiz is a free online quiz that tests your knowledge of skincare science with 50 questions about SPF, ingredients, and skin health. SPF 30 sunscreen blocks approximately 97% of UVB rays, while SPF 50 blocks about 98% — the difference is smaller than most people think.
Each round presents 10 randomized questions from a pool of 50, with four multiple-choice options and instant feedback after every answer. Your final score comes with a performance tier and shareable results.
You'll explore the science behind sunscreen and SPF ratings, powerhouse ingredients like retinol and hyaluronic acid, the truth about skin types and acne, anti-aging evidence, Korean skincare routines, the skin's acid mantle, and the surprising history of cosmetics from ancient Egypt to today.
SPF stands for Sun Protection Factor. It measures how well a sunscreen protects against UVB rays. SPF 30 blocks about 97% of UVB rays, while SPF 50 blocks about 98%.
Retinol is a form of vitamin A widely used in skincare. It promotes cell turnover, stimulates collagen production, and helps reduce fine lines, wrinkles, and uneven skin tone. It is one of the most evidence-backed anti-aging ingredients available.
The general rule is to apply products from thinnest to thickest consistency: cleanser, toner, serum, moisturizer, and sunscreen (in the morning). This allows each product to absorb properly before the next layer is applied.
Last updated: March 2026