Does hair transplantation really work? High satisfaction rates and the reality of transplanted hair loss over time

Hair transplantation is a surgical procedure that moves hair from areas that have not thinned, such as the back of the head, to thinning areas. For people whose condition is suitable, good results are reported in both men and women[1]. However, the total number of hairs does not increase; it is a treatment that redistributes existing hair, and transplanted hair may decrease over time[2]. High-quality comparative studies are still limited, and a long-term plan combining medication treatment is assumed to be necessary[3].

How much improvement is reported with hair transplantation?

Reports show increases in satisfaction with appearance in both men and women. In a retrospective study of 1,106 men with male-pattern hair loss, the surgery was effective and clearly increased satisfaction with appearance[4].

In another study of 52 people, hair density was clearly improved in those under age 33[4]. In a study of 62 women, the median number of transplanted grafts was 1,700, and no major complications occurred[5].

In a study of 60 East Asian women with a broad forehead who underwent hairline transplantation, average satisfaction with hairline appearance was 4.52 out of 5 points[6].

How strong is the evidence?

Although there are many hair transplantation studies, high-quality comparative research is actually limited. According to European guidelines, of 77 publications addressing male hair transplantation, only 3 met the criteria[3].

The level of evidence is rated as low (Level 4)[3]. The differences in surgical technique and the difficulty in measuring hair growth are cited as reasons[3].

Many high-satisfaction studies are also retrospective, reviewing past records[4][5]. Treat the numbers as a rough indication of "such reports exist."

Does transplanted hair last permanently?

Transplanted hair may also decrease over time. In a study following 112 men for 4 years, only 8.92% maintained density in the transplanted area, while 8.03% showed clear decrease[2].

Of the remainder, 55.35% showed moderate decrease and 27.67% showed slight decrease[2]. About 9 in 10 people experienced some degree of density reduction.

Male-pattern hair loss is a condition that progresses over a lifetime, and hair transplantation does not treat the underlying cause itself[2].

What changes when combining with medication?

In men, better results are reported when medication is combined. Men who combined daily finasteride 1 mg with surgery showed better results 12 months after surgery than those who had surgery alone[3].

On the other hand, evidence confirming the benefit of combined treatment in women is still insufficient[3]. Since finasteride has reported side effects such as sexual dysfunction, discuss this including whether you can continue taking it[4].

There are 3 studies (217 people) combining PRP (a component made from your own blood) with hair transplantation, and improved hair density and graft survival are reported[2]. However, PRP preparation methods vary across studies and are still under investigation[2].

When can results be seen?

Results can be assessed 3 months or more after surgery[7]. Transplanted hair enters a resting phase immediately after implantation, and it takes up to 3 months to resume growth[7].

Some of the transplanted hair will not successfully take, which is unavoidable[7]. The rate depends on the surgeon's skill, implantation density, graft preparation method, and whether grafts dry out[7].

When is hair transplantation not suitable?

During early stages of hair loss, careful planning is needed. Guidelines require that hair transplantation be performed only when sufficient hair remains for potential future procedures[3].

Cases with unrealistic expectations are considered a reason not to perform surgery[3]. For scarring alopecia (hair loss due to inflammation destroying hair roots), evidence is very limited, and in a report of 5 patients, 2 experienced strong dissatisfaction at an early stage[8].

Complications from the follicular hair transplantation (FUE) method are mostly minor and resolve naturally[9]. In a study of 60 people, follicle inflammation was seen in 7 people and itching in 4[6].

What should be confirmed during consultation to determine if it is right for you?

The results achievable with hair transplantation vary greatly depending on the density, volume, and quality of hair in the donor area and how hair loss will progress in the future[1]. This cannot be determined without examining the scalp.

The strip method (FUT), which removes a band of scalp, allows harvesting many grafts but leaves a linear scar, while FUE leaves less noticeable scars but requires a wider donor area[10]. During consultation, confirm which harvesting method suits you, how to continue medication, and how much room there is for additional procedures.