Does Dirty Hair Grow Faster?

One of the most persistent myths floating around hair care on social media is that dirty hair grows faster. But before you’re tempted to skip your next wash or two in hopes of speeding up hair growth, let’s explore whether there’s any truth to this claim, and what you can actually do to enhance your hair growth and quality. If perhaps another approach may be better, or what hair loss treatment may be more suitable.

Where Did This Myth Come From?

The idea that dirty hair grows faster likely comes from the belief that natural oils (sebum), which the scalp produces, nourish and protect the hair. But this is only half true. While sebum does play a role in hair health, allowing dirt, oil, and product to build up for too long can actually do more harm than good.

Does Dirty Hair Grow Faster?

In the short answer, no. Leaving your hair unwashed doesn’t help it grow faster. Hair growth is largely determined by factors such as genetics, hormone levels, blood circulation, and overall health; not by how often you wash your hair. Hair grows from follicles beneath the scalp, not from the scalp itself. Whether your hair is clean or dirty has no impact on how quickly follicles produce new strands.

In fact, poor scalp hygiene can clog follicles, cause dandruff and inflammation, and even lead to increased shedding.

Is Clean Hair Better than Dirty Hair?

Maintaining a clean scalp creates the ideal environment for healthy hair growth. By removing the buildup of oils and dead skin, you can prevent dandruff and scalp irritation; both of which can contribute to hair loss. Massaging the scalp during shampooing can also help improve blood flow, a key factor in supporting the hair growth cycle. If your hair feels oily, using a gentle shampoo can help refresh your scalp without stripping away essential oils.

What Can Help Hair Grow?

If you’re aiming to support hair growth, skip the shampoo-skipping trend and turn to evidence-based solutions instead. Lifestyle changes such as eating a balanced diet, stress management, and maintaining a healthy sleep routine can all contribute to stronger, healthier hair. Supplements like Biotin, vitamin C,  vitamin E and vitamin D may also support hair health, especially when there may be a deficiency.

Treatment for Hair Loss

If you’re still struggling with hair thinning or loss, a clinical approach may be right for you. We can help men with hair loss treatment, however, if you are a female customer, please discuss your treatment options with your GP as we are unable to prescribe these products for you remotely.

The Bottom Line

Dirty hair may seem like a simple shortcut to better growth, and while it might look fuller due to oil and volume at the roots, this is just an illusion. In reality, the opposite is true: a clean, healthy scalp provides the best environment for fuller, healthier hair to grow. So if you’re hoping for that hair boost, stick to a consistent hair care routine, and if you’re looking to go further, speak to a healthcare professional and explore proven treatments.