This article will explore how people with different hair types can choose the right shampoo for them from a scientific perspective, and support these recommendations with detailed data and research.
Classification of hair types
Scientists and beauty experts usually classify hair types into the following categories:
Each hair type has its own unique needs, so when choosing a shampoo, you need to adjust to these needs.

Oily hair
People with oily hair tend to have greasy and heavy hair due to their strong sebaceous glands. According to a 2016 study in the Journal of Cosmetic Dermatology, about 30% of adults have oily hair.
Recommended:
- Shampoos with oil-control ingredients, such as tea tree oil and lemon extract.
- Lightweight formulas without excessive moisturizing ingredients.
- For example: Neutrogena T/Sal Therapeutic Shampoo, Klorane Oil Control Shampoo.
Recommended products:
Oalen's oil-control shampoo, which contains natural tea tree oil and lemon extract, effectively controls oil secretion while keeping the scalp refreshed.

Dry hair
People with dry hair have less oil secretion from their scalp, and their hair is prone to dryness, split ends, and breakage. A 2018 study in the International Journal of Trichology pointed out that about 25% of people have dry hair.
Recommended:
- Shampoos with moisturizing ingredients, such as glycerin, vitamin E, and coconut oil.
- Moisturizing formulas help lock in moisture.
- For example: Moroccanoil Hydrating Shampoo, OGX Hydrating + Tea Tree Mint Shampoo.
Recommended products:
Oalen's Moisturizing Shampoo, enriched with coconut oil and vitamin E, deeply moisturizes the hair and repairs dry and damaged hair.

Normal hair
Neutral hair is the ideal type of hair that is neither greasy nor dry. It needs to maintain its natural balance.
Recommended options:
- Mildly moisturizing to balance oil secretion.
- Free of irritating ingredients.
- For example: Aveda Shampure Shampoo, Pantene Pro-V Daily Moisture Renewal Shampoo.
Recommended products:
Oalen's Balancing Shampoo, with a gentle formula suitable for daily use, keeps the scalp and hair healthy.

Damaged hair
Damaged hair is usually caused by chemical treatments, heat treatments or environmental factors. A 2015 study in the Journal of Cosmetic Science found that more than 50% of people will experience damaged hair at some stage.
Recommended:
- Repairing and strengthening ingredients such as keratin, amino acids and proteins.
- Nourishing formulas to help restore hair to health.
- For example: L'Oréal Paris Total Repair 5 Shampoo, Dove Intensive Repair Shampoo.
Recommended products:
Oalen's repair shampoo, rich in keratin and amino acids, repairs damaged hair and restores its strength and shine.
Curly hair
Curly hair is often more prone to dryness and frizz, and requires special care to maintain its elasticity and shine. A 2019 study in the International Journal of Cosmetic Science showed that about 15% of people have curly hair.
Recommended:
- Shampoos with highly moisturizing ingredients such as shea butter and argan oil.
- Provides extra nourishment and anti-frizz effects.
- For example: SheaMoisture Coconut & Hibiscus Curl & Shine Shampoo, DevaCurl No-Poo Original Zero Lather Conditioning Cleanser.
Recommended products:
Oalen's Curl Moisturizing Shampoo, enriched with Shea Butter and Argan Oil, deeply nourishes curly hair and prevents frizz.
Fine Hair
People with fine hair tend to have flat hair and lack volume. They need a lightweight, thickening shampoo.
Recommended options:
- Lightweight formulas that provide extra volume.
- Contains thickening ingredients such as protein and collagen.
- For example: Biolage Volume Bloom Shampoo, John Frieda Luxurious Volume Touchably Full Shampoo.

Recommended products:
Oalen's Volumizing Shampoo, with protein and collagen ingredients, adds thickness and volume to hair.
Conclusion
According to scientific research and data, different hair types require different types of shampoos to meet their specific needs. Knowing your hair type and choosing the right products can effectively improve the health and appearance of your hair. Oalen's series of shampoos provide professional care for different hair types, meet various needs, and make your hair glow with health and radiance.