Adam RafaelSharon Osbourne has publicly warned that Ozempic may have "completely ruined" her metabolism after losing 42 pounds (19 kg) on the drug — and now says she cannot regain weight despite stopping the medication. Her admission, widely reported this month, has reignited a critical medical debate: what are the long-term health risks of rapid weight loss, and when should you speak to a doctor?
What Sharon Osbourne Said — and Why It Matters
The 73-year-old television personality and wife of the late Ozzy Osbourne began taking Ozempic (semaglutide) in December 2022. She has stated publicly that she went "too far" with the weight loss and now struggles with persistent appetite suppression and inability to gain weight, even after discontinuing the drug.
Her case gained renewed public attention on 28 February 2026, when she and daughter Kelly Osbourne appeared at the BRIT Awards to accept a posthumous Lifetime Achievement Award for Ozzy Osbourne, who died on 22 July 2025. Both appeared visibly underweight, sparking widespread concern from fans and health professionals.
Sharon told reporters: "I can't put on weight now. I think my metabolism might be completely ruined."
This is not an isolated case. Medical professionals have documented a pattern of patients experiencing similar difficulties after prolonged use of GLP-1 receptor agonists like Ozempic and Wegovy.
What Doctors Say About Ozempic and Metabolism
GLP-1 receptor agonists work by mimicking a gut hormone that signals fullness to the brain, slowing digestion and suppressing appetite. They were originally developed to treat type 2 diabetes and have since been approved for weight management.
What medical research shows:
- Clinical trials published in the New England Journal of Medicine found that patients regained approximately two-thirds of lost weight within two years of stopping Ozempic
- This "rebound" occurs because the drug suppresses hunger signals, but does not address the underlying hormonal set-point that determines body weight
- Some patients report that prolonged suppression of appetite can lead to nutritional deficiencies, including low protein intake and muscle mass loss (sarcopenia)
- Rapid, significant weight loss — particularly in older adults — is associated with increased risk of bone density loss and cardiovascular complications
A GP or specialist doctor can assess whether observed weight loss is within a healthy range and monitor for warning signs such as fatigue, hair thinning, muscle weakness, or irregular heart rhythm.
The Wider Ozempic Conversation in the UK
Semaglutide under the brand name Wegovy became available on the NHS in England in 2023, initially for patients with a BMI over 35 with at least one weight-related health condition. By 2026, prescriptions have expanded significantly, with over 1.2 million patients in England currently receiving GLP-1 medications.
The NHS is now reviewing long-term monitoring protocols, particularly for patients over 60 and those with pre-existing cardiovascular conditions.
Private prescriptions — which account for a significant portion of Ozempic use — often lack the same ongoing clinical oversight as NHS treatment pathways. This is where the risk increases. Patients self-prescribing or using telehealth services without face-to-face consultation may miss warning signs that a GP would catch in a standard review.
When Should You See a Doctor About Weight Loss?
The following situations warrant prompt medical attention:
Unintentional weight loss:
- More than 5% of body weight lost over 6–12 months without trying
- Accompanied by fatigue, night sweats, or changes in appetite
During or after GLP-1 medication:
- Persistent nausea or vomiting beyond the first weeks
- Inability to eat adequate meals
- Feeling cold, lightheaded, or unusually fatigued
- Hair loss or significant muscle weakness
- Struggling to regain a healthy weight after stopping the drug
Mental health signals:
- Body image concerns that are affecting daily life
- Grief-related appetite loss (as in the case of Sharon and Kelly Osbourne following Ozzy's death) can be medically significant and should be discussed with a GP
Sharon Osbourne's case is a reminder that even medically supervised weight loss can have unexpected long-term consequences. The key is access to ongoing, professional medical guidance — not just at the start of treatment, but throughout and after.
Getting Professional Advice
If you are concerned about rapid weight loss, Ozempic use, or changes in your metabolism, speaking to a qualified doctor is the right first step. On Expert Zoom, you can connect with experienced health specialists who can assess your situation, review your medication history, and provide personalised guidance.
Grief, medication, and metabolic change are all complex — and none of them should be managed alone.
Medical Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before making decisions about prescription medication or significant dietary changes.
