Over the past year we have seen a noticeable increase in clients contacting Opti Laboratories with concerns about thinning eyelashes or eyebrows after starting weight loss injections such as Wegovy (semaglutide), Ozempic, or Mounjaro (tirzepatide).
These medications have been genuinely life changing for many people. For the majority they are safe and used with few side effects or problems. However, a small number of users do report unexpected changes in hair health, including thinning of the scalp, brows, or lashes.
If you’ve noticed this, the most important reassurance is the shedding is usually temporary and reversible.
GLP-1 receptor agonists such as semaglutide and tirzepatide promote appetite suppression and significant weight reduction. While this is the goal, the rapid metabolic change can influence the hair cycle in several ways. The sudden stress on the body from rapid weight loss can cause telogen effluvium which is a temporary, non-scarring form of hair shedding.
Possible contributing factors include:
Hair follicles are metabolically active structures within the skin. When the body experiences sudden nutritional or hormonal shifts, your hair follicles may prematurely enter the resting phase. If the stress is particularly high then this can lead to shedding 6–12 weeks later.
No. In almost all cases associated with weight loss injections the shedding is temporary.
Once nutritional balance is restored and weight loss stabilises, lashes and brows typically begin to recover within two to three months. Full regrowth may take six months or longer, depending on the individual.
The research is not complete but it is thought that permanent follicle damage is rare in the case of any eyebrow or eyelash loss from weight loss injections.
Our experience closely mirrors the published research. In several cases, clients experiencing lash or brow thinning were found to be:
With modest dietary adjustments and improved nutrient consistency, regrowth resumed while weight loss continued.
Importantly, the injections themselves were not necessarily the sole cause. It is often the bigger picture around the use of injections such as meal planning.
Once nutritional intake is stabilised and underlying factors are corrected, many people wish to accelerate cosmetic recovery of their lashes and brows.
Bimatoprost works by prolonging the active growth phase of hair follicles. It does not cure telogen effluvium or nutritional deficiency directly, but it helps to support eyelash and eyebrow regrowth once systemic balance has been restored.
Its mechanism is independent of GLP-1 signalling and independent of weight loss pathways, so it would not interfere with any weight loss injections.
We regularly support:
Our team has decades of experience but we still continue to advance our knowledge and grow as a company. We carry out experiments for new therapies and treatments, we develop our own custom formulations and design new products.
The pictures that you see of our products are taken in photoshoots that we arrange and run ourselves in London. We use real clients – some that have been using our products for over 10 years – to show the real results that you can achieve.
We regularly review the scientific and medical literature to keep up with the latest developments, and we publish scientific papers with our own findings. These articles explain eyelash and eyebrow loss linked to weight-loss injections, plus the wider science of lash and brow function, structure and regrowth.
