Health Check Before a Hair Transplant
Why We Check Blood Glucose First for Hair Transplant Graft Survival
When preparing for a hair transplant, your health status before surgery is as important as the design and the number of hairs transplanted. In particular, uncontrolled diabetes can affect wound healing and blood flow, which may work unfavorably for transplanted follicles as they settle in.
In this article, based on the video explanation by Director Yoo Hwa-jung of Modi Hair Plant Clinic, we cover the relationship between diabetes and hair transplant graft survival, fasting blood glucose and HbA1c testing, and what to prepare before your consultation.
Key Summary
- Uncontrolled diabetes may be unfavorable for hair transplant graft survival and recovery. Wound healing, blood flow, and infection risk should all be reviewed together.
- Fasting blood glucose and HbA1c show different information. They are evaluated together to assess blood glucose at the time of testing and the average blood glucose status over roughly the past 3 months.
- Eligibility for surgery is not decided by a single test number. The timing of surgery is determined by considering blood glucose control status, comorbidities, and medications together.
How Does Diabetes Affect Hair Transplant Graft Survival?
A hair transplant is a procedure in which hair follicles are harvested and moved to another area of the scalp. For transplanted follicles to settle in, the surrounding tissue needs to recover and there must be an environment in which oxygen and nutrients can be supplied through the blood.
When blood glucose is not well controlled, problems can arise in this recovery process. Taking this into account, Modi Hair Plant informs patients that uncontrolled diabetes may be unfavorable for graft survival and post-surgical recovery.
1. Wound Healing May Be Delayed
Small wounds are created in the areas where follicles are harvested and transplanted. Changes in tissue recovery function due to diabetes can interfere with the healing process, so it is important to check blood glucose control status before surgery. [1]
2. Post-Surgical Infection Risk Must Also Be Reviewed
High blood glucose before and after surgery is associated with the risk of complications, including infection. However, this does not mean that infection will necessarily occur if you have diabetes; rather, it means that blood glucose should be evaluated as an important risk factor in the surgical plan. [2]
3. It May Be Unfavorable for the Environment in Which Transplanted Follicles Settle
If problems arise with blood flow and tissue recovery, the process by which transplanted follicles settle in stably may also be unfavorable. Therefore, surgical preparation that takes graft survival into account includes evaluating not only the scalp condition but also overall systemic health.
It is not possible to state definitively how much graft survival rates decrease.
There are studies that mention diabetes as a factor that may affect growth after a hair transplant, but they do not present a figure for reduced graft survival that can be applied to all patients with diabetes. Individual results vary depending on multiple factors such as the degree of blood glucose control, vascular condition, surgical method, and aftercare. [3]
Sometimes an Unknown Blood Glucose Problem Is Found on the Day of the Hair Transplant
In the video, Director Yoo Hwa-jung explains that during the process of checking medical history and medications before surgery and carrying out the necessary tests, there are cases in which a blood glucose problem the patient was unaware of is discovered and the surgery is postponed.
If you have arranged time off and a schedule for the surgery, a sudden schedule change can be disappointing. However, a hair transplant is, in most cases, an elective procedure whose schedule can be adjusted. If a condition unfavorable to recovery is identified, it may be necessary to first evaluate and treat your health status and then reschedule the surgery.
To reduce such same-day schedule changes, the video introduces the process of checking, from the consultation stage, whether you have had a recent health screening as well as your conditions and medications, and carrying out the necessary basic tests.
The content introduced here reflects the clinic's clinical experience as presented in the video. It does not mean that the same issue occurs in every hair transplant patient, or that every clinic applies the same testing and postponement criteria. Please confirm the actual test items and schedule during your consultation.
Why Are Fasting Blood Glucose and HbA1c Checked Together?
Blood glucose can change depending on meals, stress, and physical condition. Therefore, if blood glucose is high at the time of testing, it is also necessary to review data showing longer-term blood glucose status.
| Category | Fasting Blood Glucose | HbA1c |
|---|---|---|
| What it shows | Blood glucose at the time of testing, measured in a fasting state | Average blood glucose status over roughly the past 3 months |
| Points to consider in interpretation | Effects of whether fasting was maintained, stress, acute illness, etc. | Conditions that may affect the value, such as anemia or a recent blood transfusion |
| Use before surgery | Checking current blood glucose status and the need for further evaluation | Supporting data for understanding recent blood glucose control status |
HbA1c reflects blood glucose status over roughly the past 3 months, but it is not accurate in every situation. Abnormal results in people without symptoms may require confirmatory testing, and test results should be interpreted by medical staff together with other clinical information. [4]
The video explains the process of additionally checking HbA1c when fasting blood glucose is found to be high. This is a process for understanding blood glucose status in more detail, and if necessary it may lead to internal medicine consultation and further testing.
If Blood Glucose Is High, Must a Hair Transplant Always Be Postponed?
Whether to postpone surgery is decided by considering blood glucose control status and overall risk together. In addition to test values, current symptoms, comorbidities, medications, the scope of surgery, and the anesthesia plan must also be reviewed.
The American Diabetes Association's perioperative management guidelines also emphasize the importance of blood glucose management while not recommending postponing surgery based on an HbA1c value alone. These are general surgical management guidelines and are not graft survival criteria specific to hair transplantation. [2]
Conversely, if blood glucose is not sufficiently controlled and it is judged difficult to perform surgery in the current condition, internal medicine treatment and follow-up may be carried out first. The reassessment timing mentioned in the video is also guidance for an individual case and does not mean that every patient can undergo surgery simply after a certain period has passed.
What matters is confirming whether you are in a condition to undergo surgery, rather than keeping to a surgery date.
Checking your health status, including blood glucose, in advance allows you to prepare necessary treatment and schedule adjustments with more time to spare.
What Should You Prepare Before a Hair Transplant Consultation?
- Recent health screening results: If you have test results such as blood glucose or HbA1c, please bring them along with the test dates.
- Diagnosed conditions and treatment history: Please let us know about conditions you are currently being treated for or were previously diagnosed with, such as diabetes, hypertension, hyperlipidemia, or gout.
- List of medications and injectables: Please check drug names and dosages, times taken, and the most recent administration dates of injectables. Photos of medication packets or prescriptions are also helpful.
- Recent changes in health status: Please let us know about recent illnesses, newly developed symptoms, or changes to your medications.
- Fasting and medication instructions for the day of surgery: Please confirm with the clinic before surgery which preparation method applies to you.
Do not stop taking medications on your own.
Adjustments to medications, including diabetes medications and insulin, must follow the guidance of your prescribing medical staff and the surgical medical staff. Do not apply another person's surgical preparation method to yourself, and do not take additional medication in an attempt to lower your blood glucose level.
What Does the Research Evidence Currently Show?
The point that diabetes and high blood glucose can affect wound healing and post-surgical complications is addressed in general wound care literature and in perioperative diabetes management guidelines. [1] [2]
In the field of hair transplantation, a retrospective study of 73 people mentioned diabetes as one of the factors that may affect the growth of transplanted hair. However, this study was not designed to precisely compare graft survival rates between patients with and without diabetes. [3]
Therefore, a distinction must be made between explaining the possibility that uncontrolled diabetes may be unfavorable for graft survival and recovery and asserting that having diabetes lowers the graft survival rate by a certain percentage. At Modi Hair Plant, surgical plans are explained taking both these risks and each individual's health status into account.
Frequently Asked Questions
Does having diabetes lower the hair transplant graft survival rate?
Uncontrolled diabetes can affect wound healing and blood flow, which may work unfavorably for graft survival. However, the evidence for explaining the degree of reduction in individual graft survival rates as a uniform number is limited. It is important to check blood glucose control status and comorbidities before surgery.
Can I have a hair transplant while taking diabetes medication?
Eligibility for surgery is not determined by the fact that you are taking medication alone. It is judged after checking recent test results, blood glucose control status, and whether complications are present. Please let us know the drug names and dosages during your consultation.
If fasting blood glucose is high once, does that mean I have diabetes?
There are cases where it is difficult to judge based on a single result. Whether fasting was maintained, symptoms, and other factors are checked, and if necessary, confirmatory testing and internal medicine evaluation are carried out. Do not interpret point-of-care test results on your own to make a diagnosis or adjust medications.
If HbA1c is high, is surgery always cancelled?
It is not decided uniformly based on HbA1c alone. Current blood glucose and overall systemic condition are evaluated together to determine whether to proceed with or postpone surgery. If uncontrolled diabetes is identified, reassessment after treatment may be necessary.
If surgery was postponed because of blood glucose, when can I have it?
It depends on the process of stabilizing blood glucose and on comorbidities. Eligibility for surgery is not determined merely because a certain period has passed; the timing of surgery is discussed again after reviewing treatment progress and test results.
Should I take my diabetes medication as usual on the day of surgery?
Instructions may differ depending on the type of medication and the fasting and anesthesia plans. Do not take or stop medication on your own; please confirm your medication plan with your prescribing medical staff and the surgical medical staff before surgery.
Start Your Hair Transplant Preparation by Checking Your Health Status
If you have diabetes or were told of an abnormal finding in a recent blood glucose test, please share your test results and medication information at your consultation.
At Modi Hair Plant Clinic, your scalp and hair condition can be reviewed together with your overall health status, and you can receive guidance on the necessary checks and the surgical preparation process.
This article is general medical information compiled based on the video explanation by Director Yoo Hwa-jung of Modi Hair Plant Clinic and related literature. It does not replace individual diagnosis or prescription. Hair transplant results and the recovery process vary between individuals, and test items as well as whether and when to undergo treatment or surgery are determined after a medical consultation.
References and Sources
- Sharp A, Clark J. Diabetes and its effects on wound healing. Nursing Standard. 2011;25(45):41–47. DOI: 10.7748/ns2011.07.25.45.41.c8626. View on PubMed
- American Diabetes Association Professional Practice Committee for Diabetes. 16. Diabetes Care in the Hospital: Standards of Care in Diabetes—2026. Diabetes Care. 2026. DOI: 10.2337/dc26-S016. View in the journal
- Loganathan E, Sarvajnamurthy S, Gorur D, Suresh DH, Siddaraju MN, Narasimhan RT. Complications of Hair Restoration Surgery: A Retrospective Analysis. International Journal of Trichology. 2014;6(4):168–172. DOI: 10.4103/0974-7753.142861. PMID: 25368473. View the full paper
- National Institute of Diabetes and Digestive and Kidney Diseases. The A1C Test & Diabetes. HbA1c test information