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When it comes to hair care, a common belief persists: if you trim your hair regularly, it grows faster and thicker. However, experts are weighing in to debunk this myth, revealing that the science behind hair growth is more complex than many realise. According to Desmond Tobin, a professor of dermatological science at University College Dublin, the notion that cutting hair influences its growth rate is simply not true.
Understanding Hair Growth
Hair growth occurs from follicles located 2-4 millimetres beneath the scalp. These tiny structures are responsible for the formation of hair long before it becomes visible. By the time you see the hair that you’re cutting, it is already dead, hardened tissue, and therefore, trimming it has no bearing on the activity happening within the follicles below.
Tobin explains that hair typically grows at a rate of about 1 centimetre per month during a prolonged growth phase that can last for several years. This natural cycle concludes with shedding, after which it begins anew. Importantly, the rate of this growth is predominantly determined by genetics and cannot be accelerated simply by wielding a pair of scissors.
The Illusion of Length
While cutting hair doesn’t speed up growth, it can create the illusion of longer, fuller hair. Damage from heat styling and harsh chemical treatments can weaken the hair shaft, leading to brittleness and split ends. When hair breaks off faster than it grows, it appears stagnant in length.
Tobin likens this misconception to pruning a hedge. “When you give it a good clip into shape, it can give the impression of being denser. You haven’t changed what’s happening in its deeper branches – you’ve just tightened up the overall appearance.” In the same vein, cutting the ends of hair can make individual strands feel thicker since they taper as they move away from the scalp.
Prioritising Hair Health Over Frequent Trims
For those hoping to grow their hair, Tobin offers a different piece of advice: focus on minimising damage rather than opting for frequent trims. “The priority should be to maintain the hair fibre in a virgin state with the least aggressive chemical or thermal exposure,” he recommends.
This approach emphasises the importance of hair care routines that protect the hair from damage, rather than relying solely on trimming to achieve a fuller look. Gentle handling, using heat protectants, and choosing mild hair products can all contribute to healthier hair that has the potential to grow longer.
Why it Matters
Understanding the relationship between hair cutting and growth is essential for anyone looking to enhance their locks. By dispelling the myth that frequent trims lead to faster hair growth, individuals can shift their focus towards effective care strategies that truly promote hair health. This knowledge not only empowers consumers but also encourages informed choices in their hair care journeys, leading to better results in the long run.
