この記事の概要
AGA (male pattern baldness) is a common problem faced by many men and is primarily caused by genetics and hormonal balance. However, recent studies suggest that lifestyle habits may influence the progression of AGA. Among these, smoking has been highlighted as a factor that increases the risk of AGA. Let's take a closer look at the effects of smoking on AGA in terms of blood flow, oxidative stress, hormone balance, and genes.
- Effect on blood flow
Poor circulation: Smoking is known to constrict blood vessels and impair blood flow. Hair follicles are supplied with nutrients and oxygen from the blood, so when smoking reduces blood flow, the hair follicles receive insufficient nutrients and can stunt hair growth. This may be a contributing factor to the progression of AGA. - Increased oxidative stress
Production of free radicals: Smoking produces unstable molecules called free radicals in the body. These free radicals cause oxidative stress and damage cells. Hair follicle cells are also exposed to oxidative stress, which can inhibit hair growth and promote hair loss. - Effect on hormonal balance
Effects on DHT levels: Smoking can affect hormonal balance, particularly the production and action of DHT (dihydrotestosterone). DHT is considered to be the main cause of AGA, and smoking may intensify the effects of DHT. - Effect on genes
Changes in gene expression: Research suggests that smoking can change the expression of certain genes. This may activate genes involved in the progression of AGA, which may accelerate hair loss. - Examples of research results
Statistics: Some studies show that smokers have a faster progression of AGA or a higher risk of hair loss than non-smokers. For example, data has been reported that the incidence of AGA is higher among smokers than among non-smokers.
Strength of association: However, the effect of smoking on AGA is relatively weak compared to genetic factors and other lifestyle factors (diet, stress, etc.). Still, smoking is likely a contributing factor to worsening AGA.
Summary
The impact of smoking on male pattern baldness (AGA) has been shown to exacerbate AGA, as suggested by several studies. Smoking’s impaired blood flow, increased oxidative stress, hormonal imbalance, and altered gene expression may act as factors that interfere with the supply of nutrients to the hair follicle and inhibit hair growth. Statistically, smokers have been reported to develop AGA more rapidly than nonsmokers, although the strength of this effect is relatively weak compared to other factors. Nevertheless, since smoking is an important factor that increases the risk of AGA, smoking cessation and lifestyle modification may contribute to preventing or slowing the progression of AGA.
