Hair Loss That Comes Back
Most people who have gastric sleeve surgery know about telogen effluvium – the hair shedding that typically begins around month three post-op and resolves by month six or seven. What is less discussed is what happens to hair in year two and beyond: for some people, it does not fully recover, and for others, a secondary phase of increased shedding occurs later.
Both of us have experienced ongoing hair concerns well beyond the initial post-op shedding phase in the two years since our surgery at Weight Loss Riga in March 2024. This is not what we were told to expect, and we want to be honest about it.
Why Hair Loss Can Continue or Recur
The initial telogen effluvium after bariatric surgery is driven by the physical stress of surgery and the rapid caloric restriction that follows. It is well-documented and, for most people, temporary. Secondary hair loss, or failure of full recovery, is typically driven by ongoing nutritional factors – most commonly deficiencies in iron, ferritin, zinc, biotin, or protein. In some people, thyroid changes triggered by significant weight loss also contribute.
This is why hair health after bariatric surgery is not simply a matter of waiting out the initial shed. It requires ongoing monitoring through regular blood tests and consistent supplementation. A deficiency that develops gradually – as James experienced during his nutritional crisis at month eleven – can manifest in hair thinning that begins two to three months after the deficiency takes hold, because of the delay in the hair cycle.
What Helped and What Did Not
The interventions that made a genuine difference were nutritional rather than cosmetic. Getting iron and ferritin levels into a good range, maintaining consistent protein intake, and ensuring zinc was included in the supplementation routine all contributed to stabilisation. Specialist bariatric hair supplements exist and contain the relevant micronutrients in appropriate forms – these are worth considering if standard multivitamins are not maintaining adequate levels.
Cosmetic interventions – thickening shampoos, hair fibres, scalp treatments – do not address the underlying cause. They can make hair look better in the short term and there is nothing wrong with using them, but they should not be mistaken for treatment. If hair loss is significant and persistent, a blood test panel that specifically includes ferritin, zinc, thyroid function, and B12 is the right starting point, not a trip to the hair salon.
Accepting What Is Uncertain
The honest answer about hair recovery after bariatric surgery is that outcomes vary. Most people see significant recovery. Some do not fully recover their pre-op density, and this is something the bariatric community does not talk about with sufficient frankness. Accepting this – while also doing everything nutritionally and medically possible to support recovery – is a more useful position than expecting a specific outcome or interpreting ongoing thinning as personal failure.
We are both still working on this. It is part of the ongoing reality of post-surgery life that sits alongside the many improvements that have made surgery the right choice for us.
Sources
BOMSS – Guidelines on the peri-operative nutritional management of bariatric patients
NICE CG189 – Obesity: identification, assessment and management
NHS – Vitamin and mineral deficiencies after bariatric surgery
British Association of Dermatologists – Telogen effluvium guidance
About this content
This blog is written by James and Kirsten, a couple from the UK who had gastric sleeve surgery together in March 2024.
We started this blog because we couldn't find any sources of content that details before surgery, the surgery and then life post surgery - so we decided to write one ourselves.
Everything on this site is based on our own experience and the research we have done along the way. It is not medical advice. Gastric sleeve surgery is a serious procedure and every patient's journey is different. Please always consult your own bariatric team or GP before making any decisions about your health or treatment.
Some posts on this site may contain featured or sponsored content, or affiliate links. Where this is the case, it will always be clearly stated at the top of the article. Our opinions are always our own.
Publish Date: 20 November 2025 | Last Reviewed: 7 June 2026 | Next Planned Review: 7 December 2027