Hair & Scalp
Learning Library
Clear guides to hair growth, hair loss, ingredients, and the science behind your routine.
What would you like to understand?
How Hair Grows
Follicles, growth cycles, and hair biology.
Explore the guideWhat Causes Hair Loss?
Understand thinning, shedding, and common causes.
Explore the guideScalp Health
Explore oil balance, dryness, buildup, and comfort.
Explore the guideIngredient Library
Look up botanicals, actives, and formula context.
Explore the guideOur Science
Explore collection science, TR6™, and research.
Explore the guideA closer look at your hair care.
Explore ingredients, compare formulas, and make sense of the choices in your routine.
What is the best shampoo for hair growth?
Understand what a shampoo can do and how to choose a formula for your routine.
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DHT blockers for women: options & safety
Explore treatment differences, side effects, and questions to discuss with your clinician.
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Why does Sempre shampoo cost more?
A closer look at Sempre’s formulation, TR6™, and the thinking behind its price.
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Vegan hair growth supplements
Learn what to check in your hair vitamins, from ingredient sources to suitability.
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Sempre Foam vs. Naturale vs. La Rosa
Compare three leave-on products and the different roles they play in a routine.
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Paraben- and sulfate-free shampoo
Understand the ingredients behind the label and what to consider when choosing.
Read the guideFour series. More ways to learn.
Choose a subject to explore the full article collection.
Product & Formula Guides
What’s in Your Bottle?Understand shampoos, conditioners, supplements, and the ingredients behind their labels.
Browse the seriesHair Growth & Hair Loss
The More You Know, The More You GrowExplore hair cycles, thinning, shedding, and the biology behind changes in your hair.
Browse the seriesBotanical Ingredients
Botanical BrillianceGet to know individual botanicals, their uses, and the evidence behind them.
Browse the seriesHair & Scalp Habits
Holistic ApproachExplore everyday care, scalp massage, nutrition, and the habits that shape your routine.
Browse the series