Cosmetic Formulation Science Made Simple
Formula Chemistry is your expert guide to cosmetic formulation featuring professional skincare & haircare formulas, in-depth ingredient guides, DIY recipes, and free formulas by Dr. SamiUllah, Ph.D. in Chemistry.
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Explore over 1000 free, tested skincare, haircare, and cosmetic formulas, each one backed
by real formulation science.
by real formulation science.
DIY Encyclopedia
Discover what each cosmetic ingredient does, why formulators use it, safe usage levels, and suitable substitutions.
New Posts & Formulations
Blog
DIY Skincare for Dry Skin: Why Oil Alone Won’t Fix It
Quick Answer DIY skincare for dry skin works best when it combines all three types of hydrating ingredients: humectants to
21 August 2026
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Blog
DIY Skincare for Oily Skin: Full Routine (Stop Overdrying)
Quick Answer DIY skincare for oily skin works best when it balances oil rather than strips it, since aggressive drying
20 August 2026
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Blog
Eczema-Friendly Skincare Formulation: Ingredients to Avoid
Quick Answer Eczema-friendly skincare formulation means building gentle products around barrier-supporting and soothing ingredients while strictly avoiding common triggers. The
19 August 2026
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