To state the conclusion first, it cannot be definitively said that smoking necessarily lowers the hair transplant graft survival rate.
However, due to various biological mechanisms such as blood vessel constriction, reduced oxygen supply, and delayed wound healing, most hair transplant specialists recommend quitting smoking before and after surgery.
"Director, wouldn't smoking just one or two cigarettes after surgery be okay?"
This is one of the most frequently asked questions during consultations at Modi Hair Plant.
So when I begin a consultation, I always make sure to ask.
"Do you smoke?"
"How much do you smoke per day?"
Many people think it is simply about lung health, but in reality it is also related to the environment in which hair follicles recover.
In this article, based on the latest research, we will look at how smoking may affect hair follicles and the recovery process after a hair transplant.
Key Summary
✔ Smoking can constrict capillaries and reduce blood flow.
✔ Oxidative stress and chronic inflammation can create an unfavorable environment for hair follicles.
✔ It has been reported that smoking may promote DNA damage and cell aging.
✔ During the early recovery period after a hair transplant, when blood vessels connect, quitting smoking is recommended.
Smoking does not simply end with 'constricting blood vessels.'
The systematic review 『The Effects of Smoking on Hair Health』 published in 2021 analyzed 32 studies.
The research suggested that smoking may affect hair health through various pathways such as reduced blood flow, increased oxidative stress, DNA damage, chronic inflammation, and decreased hair follicle cell function.
📚 Key points of the paper
The Effects of Smoking on Hair Health
(2021 Systematic Review)
✔ Analysis of 32 studies
✔ Latest literature review on smoking and hair health
✔ Reduced blood flow
✔ Increased oxidative stress
✔ DNA damage
✔ Chronic inflammation
Which is more unfavorable for hair health, smoking or drinking?
Both smoking and drinking can affect hair health depending on lifestyle and consumption amount, but when summarizing the biological mechanisms known to date, smoking is more likely to act directly unfavorably on hair follicles and the recovery environment after a hair transplant.
This is because smoking can affect hair follicles not only through blood vessel constriction caused by nicotine, but also through various pathways such as reduced oxygen supply, increased oxidative stress, DNA damage, and chronic inflammation.
On the other hand, the evidence for the direct effect of drinking on hair transplant graft survival is relatively limited, unless it involves excessive or chronic drinking. However, since drinking can affect blood pressure, bleeding, swelling, sleep, and medication use, it is advisable to avoid it before and after surgery according to the clinic's guidance.
In other words, if comparing the two, in terms of hair follicle blood flow and the graft survival environment, smoking should be managed with higher priority.
① When blood vessels constrict, the blood reaching the hair follicles also decreases.
Hair follicles receive oxygen and nutrients through very small capillaries.
Nicotine acts to constrict the skin's microvessels, which can reduce blood flow.
This is even more important in hair transplants.
This is because hair follicles immediately after transplantation can only survive stably when new blood vessels connect to them.
② After a hair transplant, the 'process of blood vessel growth' is the most important.
Many patients ask,
"Why does the clinic insist on quitting smoking for about 2 weeks?"
The reason is that in order for the transplanted hair follicles to survive in their new location, new blood vessels (angiogenesis) must form.
Immediately after a hair transplant, the process of new blood vessels connecting to the transplanted hair is the most important.
Therefore, at Modi Hair Plant, considering this period, we recommend that patients absolutely quit smoking for at least 2 weeks after surgery.
③ Cigarettes can also affect DNA.
Cigarette smoke contains thousands of chemicals in addition to nicotine.
Some of these can form DNA adducts that cause cell damage, and it has been suggested that they may also affect the normal function of hair follicle cells.
💡 In simple terms
Smoking does not directly burn the hair follicles;
it is easier to understand it as worsening the environment in which the hair follicles must recover on their own.
Smoking
↓
DNA damage
↓
Cell aging
↓
Decreased hair follicle function④ Oxidative stress tires out hair follicles faster.
Smoking is known to increase reactive oxygen species (ROS) in the body and disrupt the balance of the antioxidant system.
Hair follicles are tissues sensitive to oxidative stress.
When reactive oxygen species increase, the cells around the hair follicles may be damaged, and the normal growth cycle may be disrupted.
Smoking
↓
Increased ROS
↓
Decreased antioxidants
↓
Increased hair follicle stress⑤ Chronic inflammation can change the environment around hair follicles.
It has been reported that smoking increases the expression of inflammatory cytokines and may cause persistent microinflammation around the hair follicles (perifollicular inflammation).
There is also a hypothesis that if such changes persist over a long period, the tissue around the hair follicles may become fibrotic and affect the progression of hair loss.
Smoking
↓
Chronic inflammation
↓
Inflammation around hair follicles
↓
Possibility of hair loss progression⑥ Nicotine can also affect cell signaling.
Nicotine acts on the nicotinic acetylcholine receptor (nAChR).
It has been reported that excessive stimulation interferes with normal cell signaling and may be involved in functional changes in keratinocytes and hair follicle cells.
Nicotine
↓
nAChR
↓
Cell signaling changes
↓
Possibility of reduced tissue recoveryThen does graft survival necessarily fail in smokers?
No, it does not.
Looking at the research to date, there is still a lack of large-scale clinical trials that can conclude exactly by what percentage smoking lowers the hair transplant graft survival rate.
However, various mechanisms such as reduced blood flow, decreased oxygen supply, delayed wound healing, and increased oxidative stress have been reported relatively consistently.
In other words,
Many experts agree that while smoking does not necessarily cause graft survival to fail, it does not create a favorable environment for graft survival.
Why does Modi Hair Plant emphasize quitting smoking?
A hair transplant is not simply a surgery to move hair follicles.
The process in which the transplanted hair follicles connect with new blood vessels, receive sufficient oxygen and nutrients, and settle stably is important.
That is why we explain that quitting smoking before and after surgery is not merely a lifestyle guideline but part of the treatment that manages the graft survival environment.
Summary of key points from the research
| Mechanisms reported in the research | Possible effects on hair follicles |
|---|---|
| Blood vessel constriction | Reduced blood flow |
| Reduced tissue oxygen supply | Degraded recovery environment |
| DNA damage | Possible decrease in cell function |
| Increased oxidative stress | Possible hair follicle damage |
| Chronic inflammation | Possible worsening of the environment around hair follicles |
| nAChR signaling changes | Possible effect on the cell recovery process |
FAQ
Q. Are e-cigarettes okay?
If they contain nicotine, they can affect blood vessel constriction, so caution is needed just as with regular cigarettes.
Q. When is it best to start quitting smoking before surgery?
The recommended period may differ by clinic, but generally quitting smoking for a certain period before and after surgery is recommended. It is best to follow the guidance of your treating medical staff for the exact period.
Q. Does smoking necessarily cause a hair transplant to fail?
No. However, since smoking can create various biological environments unfavorable to graft survival and recovery, quitting smoking is recommended.
Q. Should I not use nicotine patches either?
Nicotine patches do not expose you to the tar and carbon monoxide contained in cigarette smoke, but nicotine itself can affect blood vessel constriction. Therefore, before and after a hair transplant, especially during the early graft survival period, it is best to consult with your treating medical staff rather than use them on your own.
Conclusion
Smoking does not necessarily cause a hair transplant to fail.
However, when summarizing the research published to date, it has been consistently reported that smoking may create an environment unfavorable to hair follicle recovery through various mechanisms such as reduced blood flow, decreased oxygen supply, increased oxidative stress, and chronic inflammation.
In particular, the first 2 weeks after a hair transplant is the most important period during which new blood vessels connect.
If you hope for a good result, practicing smoking cessation at least during this period may help graft survival.
A hair transplant is a treatment where the recovery process, rather than the day of surgery, shapes the result.
📌 This article is in-depth content created based on that video, with the addition of the latest research and study results.
References
- Babadjouni A, Pouldar Foulad D, Hedayati B, Evron E, Mesinkovska N. The Effects of Smoking on Hair Health: A Systematic Review. Skin Appendage Disord. 2021;7(4):251–264. PubMed
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If you have questions about quitting smoking or the recovery process after a hair transplant, it is best to consult thoroughly with the medical staff and then establish a management plan suited to you.
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This content was written after medical review by the medical staff of Modi Hair Plant Clinic.