Aspirin, commonly used to reduce pain and inflammation, has recently gained attention for its potential effects on hair loss and regrowth. While not a traditional hair loss treatment, some studies suggest aspirin may influence scalp health and hair follicle activity. But how effective is it really?

Aspirin contains acetylsalicylic acid, which has anti-inflammatory properties. Chronic inflammation of the scalp is a contributing factor in various types of hair loss, including androgenetic alopecia and telogen effluvium. By reducing inflammation, aspirin may create a healthier environment for hair follicles to function more effectively.

Some preliminary research and anecdotal evidence also suggest that aspirin might improve blood flow in the scalp, delivering more oxygen and nutrients to hair follicles. However, these effects are indirect and not guaranteed.

While oral aspirin reduces inflammation throughout the body, applying it topically (in DIY aspirin-water mixtures or commercial products) may target the scalp more directly. Some people use crushed aspirin tablets mixed with water or shampoo as a scalp treatment. However, the safety and effectiveness of these homemade treatments are not well-studied, and they may cause skin irritation if not properly diluted.

Aspirin inhibits prostaglandins—compounds that can affect hair follicle cycles. Specifically, prostaglandin D2 (PGD2) is linked to hair loss. By blocking PGD2, aspirin may theoretically slow hair shedding. However, more research is needed to validate this potential benefit.

Currently, aspirin is not recognized as a standard or medically approved treatment for hair loss. Unlike minoxidil or finasteride, it hasn’t been clinically proven to stimulate hair regrowth or prevent long-term thinning. Any observed benefits are anecdotal or indirect.