Hair Loss After Bariatric Surgery: Why It Happens And How To Make It Better?
Clinician's Perspective:
• Hair loss is a common occurrence, affecting approximately 57% (nearly 6 in 10) of patients following metabolic and bariatric surgery. Most of the time, it is not severe.
• Hair loss is often temporary; the incidence rate drops from 58% in the first year to 35% after the 12-month mark.
• Younger women are most likely to report hair thinning, possibly due to a combination of physiological demands and aesthetic awareness.
• Zinc and Ferritin: Lower levels of Zinc and Ferritin (the protein that stores iron in your cells) were significantly associated with post-operative hair loss.
• Patients experiencing hair loss may have lower concentrations of Folic Acid (a B-vitamin used for cell growth).
For many individuals undergoing Metabolic and Bariatric Surgery (MBS), the focus is often on the resolution of comorbidities (secondary medical conditions) like Type 2 diabetes or hypertension. However, a common side effect frequently discussed in support groups is hair loss.
Hair loss after surgery follows a specific timeline. In the first 12 months, as the body undergoes rapid weight loss and metabolic shifts, about 58% of patients notice thinning. This gets better with time and by 12 months after surgery, this figure falls to 35% as the body reaches a new equilibrium (state of physical balance). This suggests that for most, the hair loss is a transient (temporary) phase rather than a permanent change.
Zinc, Folic Acid, Ferritin
Three key markers are often significantly lower in patients with hair loss: Zinc, Folic Acid, and Ferritin (the body’s iron storage protein). While many patients assume a lack of Vitamin B12 or general iron is to blame, the data did not support a statistical link for those specific nutrients. Instead, the focus shifts to the "storage" of iron rather than just the iron circulating in the blood.
It is important to follow the vitamin supplementation as prescribed by your surgeon.
Younger women may notice hair loss more frequently. This may be due to the higher requirements for scalp support in those with longer hair, or a higher sensitivity to the stress hormone cortisol, which can be triggered by the surgery and the subsequent catabolic state (the process of the body breaking down tissue for energy).
Ultimately, your body finds its balance. As weight loss stabilizes—usually around the one-year mark—hair follicles typically return to their natural growth cycles and thinning subsides.
If you are experiencing significant or persistent hair loss following bariatric surgery, it is essential to consult your doctor for a formal assessment. In some instances, targeted treatments like Minoxidil may be recommended to support regrowth.
Evidence Strength: While this systematic review synthesizes data from over 2,500 patients, the final rating is limited by high heterogeneity and significant publication bias in the underlying observational studies. Final Rating: ★★☆☆☆
Source: Read the full study
