Why Rosemary, Keratin & Onion Are Becoming Key Hair Growth Ingredients
Hair growth haircare is becoming one of the biggest trends in beauty. More people are now looking beyond simple shampoos and conditioners, and instead building routines around scalp care, stronger-looking hair and reduced breakage.
Globally, the natural haircare market was valued at $10.17 billion in 2024 and is projected to reach $16.99 billion by 2030, showing clear demand for more natural, ingredient-led haircare. The rosemary haircare market alone was estimated at $980.8 million in 2023 and is expected to reach $1.51 billion by 2030.
At Auvé, we believe healthy-looking hair starts with consistency, scalp care and carefully selected ingredients. Three ingredients currently leading this conversation are rosemary, keratin and onion extract.
Rosemary Oil For Scalp Care
Rosemary oil has become one of the most talked-about ingredients in haircare, especially for those focused on scalp health and fuller-looking hair.
A 2015 study compared rosemary oil with 2% minoxidil in people with androgenetic alopecia. After six months, both groups showed an increase in hair count, with no significant difference between the two groups.
This does not mean rosemary oil is a guaranteed hair loss treatment. However, it does explain why rosemary has become so popular in scalp-focused routines. Used consistently, it can support a healthier-feeling scalp and the appearance of stronger, fuller-looking hair.
Keratin For Stronger-Looking Hair
Keratin is a protein naturally found in hair. Over time, heat styling, colouring, brushing and environmental stress can leave hair looking weak, dry or brittle.
Keratin-based haircare is commonly used to help hair feel smoother, softer and more manageable. It is especially useful in growth-focused routines because breakage can make hair appear as though it is not growing. By supporting stronger-looking strands, keratin helps improve the appearance of healthier hair over time.
Onion Extract For Traditional Haircare Support
Onion extract has grown rapidly in popularity, especially across social media and natural haircare routines.
A small 2002 study looked at crude onion juice in people with patchy alopecia areata and found stronger regrowth results compared with tap water. More recently, onion-based haircare has gained major online attention, with Marie Claire reporting that TikTok content around onion juice for stronger, healthier hair was averaging 3.1 million views weekly, with search interest up 106.8%.
Raw onion juice can be messy, harsh and irritating for some scalps. That is why modern formulas often use onion extract alongside complementary ingredients such as rosemary, castor oil, keratin and nourishing plant oils.
Why Blended Haircare Works Best
Hair growth is rarely about one ingredient alone. A strong routine usually supports both the scalp and the hair fibre.
That means combining ingredients that help with:
- Scalp nourishment
- Hair strength
- Shine
- Softness
- Reduced appearance of breakage
- Healthier-looking hair over time
This is why blended hair oils, strengthening shampoos and conditioners are becoming so popular. They allow multiple ingredients to work together in a practical routine.
The Auvé Approach
Auvé’s current Nourishing Hair & Scalp Oil already reflects this approach, combining grapeseed, argan, castor, pumpkin seed and jojoba oils with rosemary essential oil and vitamin E.
As we continue developing the next stage of Auvé haircare, our focus remains simple: ingredient-led formulas designed to support the look and feel of stronger, shinier and healthier hair.
Hair growth is not just about length. It is about scalp care, reduced breakage, consistency and creating a routine your hair can respond to over time.
References
- Grand View Research – Natural Hair Care Products Market Report
- Grand View Research – Rosemary Hair Care Products Market Report
- Panahi et al., 2015 – Rosemary Oil vs 2% Minoxidil for Androgenetic Alopecia
- Sharquie & Al-Obaidi, 2002 – Onion Juice for Alopecia Areata
- Marie Claire – Onion Juice Hair Growth Trend Report