Hair grows on average 1 to 1.5 cm per month—a genetically determined rate that cannot be fundamentally altered. However, it is entirely possible to optimize the quality of growth, reduce breakage that slows down apparent lengthening, and create the best conditions for each follicle to reach its full potential. Here are the most effective products and techniques.
Hair care techniques to stimulate growth
Scalp massage
This is the simplest and most documented way to accelerate hair growth. A study published in Eplasty (2016) showed that 4 minutes of daily scalp massage for 24 weeks significantly increased hair thickness. Massage stimulates microcirculation in the hair follicles, improving the supply of oxygen and nutrients. Perform it with your fingertips using circular motions for 3 to 5 minutes, ideally before or during the application of a hair treatment. For a complete hair care routine, our article on how to care for your hair provides the essential basics.
Scalp scrub
A monthly scrub (once or twice a month) removes dead skin cells, excess sebum, and product residue that can clog hair follicles and slow growth. A simple homemade scrub: mix one tablespoon of coarse sea salt with one tablespoon of vegetable oil (castor or jojoba). Apply to a slightly damp scalp, massaging in circular motions, then rinse thoroughly before shampooing.
Rinse with cold water
A final rinse with cool water tightens the cuticle scales, improves shine, and stimulates scalp microcirculation. This simple step, performed at the end of each wash, helps strengthen the hair fiber and reduce breakage.
Choosing the right hair products
Shampoos containing harsh sulfates, occlusive silicones, or parabens weaken the hair fiber and can cause hair loss and breakage. Opt for gentle formulas (pH 5.5, SLS/SLES-free) suited to your hair type. To identify yours and choose the right products, our article on how to determine your hair type will guide you.
The best vegetable oils to accelerate growth
Plant-based oils are among the most effective hair care products for stimulating growth. Rich in fatty acids, vitamins, and antioxidants, they nourish the scalp and improve microcirculation at the follicle level. Apply them as a weekly oil treatment: massage into the scalp for 5 minutes, apply to the lengths of your hair, leave on for several hours under a warm towel, then rinse with a gentle shampoo.
Castor oil is the gold standard for hair growth. Its high ricinoleic acid content stimulates capillary microcirculation and strengthens the hair fiber. Its thick texture makes it ideal when diluted in a lighter oil (jojoba, sweet almond) for easier application.
Avocado oil , rich in omega-9 fatty acids, antioxidants, and vitamins, penetrates deep into the hair fiber to restructure it and stimulate blood flow to the follicles. To learn more about its many properties, our article "What are the benefits of avocado oil?" details them.
Nigella (black cumin) oil is rich in essential fatty acids, antioxidants, and minerals. It deeply nourishes the scalp, stimulates the roots, and reduces hair loss. Its antifungal properties also help maintain a healthy scalp, a crucial condition for good hair growth.
Amla oil (from the Indian gooseberry tree) is a staple in Ayurvedic medicine for hair growth. Rich in vitamin C, flavonoids, and antioxidants, it strengthens the hair fiber, slows premature hair loss, and promotes faster, thicker regrowth.
Mustard oil , rich in omega-3 fatty acids and erucic acid, produces a gentle warming sensation upon application, actively stimulating blood circulation at the roots. It is particularly beneficial for scalps with poor blood flow. For a comprehensive comparison of all plant-based hair oils, our article on the best plant-based hair oils presents each one in detail.
Food and dietary supplements
Hair growth depends directly on what the blood delivers to the hair follicles. A deficient diet slows growth and increases hair loss. Essential nutrients include protein (sulfur-containing amino acids for keratin synthesis), iron (for oxygenating hair follicle cells), zinc (for protein synthesis and hormone regulation), biotin (for keratin production), and vitamins A, B, and C. Prioritize eggs, oily fish, legumes, nuts and seeds, whole grains, and green vegetables. Stay well-hydrated: 1.5 to 2 liters of water per day improves blood flow to the roots.
When diet alone isn't enough—in cases of identified deficiency, intense stress, or the postpartum period—hair supplements offer targeted support. Formulas combining high doses of biotin, zinc, selenium, B vitamins, and stimulating herbs (nettle, horsetail, bamboo) are the most effective. To compare the available options and choose the right formula for your situation, our article on the best hair growth supplements analyzes the most effective formulas. Take them for a minimum of three months—the first visible effects appear only after six to eight weeks.
To learn more about preventing hair loss that hinders growth efforts, our article on how to avoid hair loss presents a comprehensive approach.
Frequently asked questions about hair growth
Which vegetable oil makes hair grow the fastest?
Castor oil is the most effective for stimulating hair growth thanks to its vasodilatory action on the scalp. Used alone, its thick texture can be difficult to apply—dilute it 50% with jojoba or sweet almond oil. Rosemary cineole essential oil, added at 2% to a carrier oil, also has strong scientific evidence for stimulating hair growth.
Does scalp massage really make hair grow?
Yes, clinical studies have confirmed this. Massage stimulates microcirculation and mechanically thickens hair follicles. It doesn't create new follicles but optimizes the function of existing ones during the anagen phase. Regularity is key: 4 to 5 minutes a day for several months.
Are hair supplements effective?
In cases of proven nutritional deficiencies (biotin, zinc, iron, vitamin D), yes—their effectiveness is well-documented. In a person without deficiencies, the effects are more modest. A blood test before starting a course of treatment helps identify actual deficiencies and choose the most suitable formula.