Gemma Collins has lost approximately 3.5 stone (about 22 kilograms) using the prescription drug Mounjaro, dropping from a UK size 26 to a size 20. She has spoken publicly about the results, the side effects that forced her to pause treatment, and a regulatory ruling that banned one of her Instagram advertisements.
How Much Weight Has Gemma Collins Lost?
Collins has reported losing 3.5 stone and moving from a dress size 26 to a size 20 after roughly a year of treatment. She has also mentioned losing 8 kilograms during a stint on I’m A Celebrity South Africa, which was filmed in September 2025.
Her stated goal is to lose 6 stone in total before her wedding. She has been explicit that her motivation is health rather than thinness, saying she never wants to look “stick thin”.
The Method: Mounjaro and Dosing
Collins has named Mounjaro (tirzepatide) as the prescription weight loss medication she used. She described the drug as “life-changing,” particularly for quieting persistent thoughts about food. She recalled a meal early in her treatment when a bread basket sat untouched in front of her. “It was great, it was liberating. I had freedom,” she said on I’m A Celebrity South Africa.
She followed a gradual dosing schedule, starting at 2.5mg and eventually reaching 15mg per week. The pain she experienced began after she moved up to the highest dose.
Health Setbacks and Side Effects
Collins suffered a gallbladder attack in August while celebrating her fiancé Rami Hawash’s 50th birthday at a race track. She described falling to the floor in “excruciating” pain. A scan arranged by her doctor revealed gallstones.
She temporarily stopped the injections but stated her doctors at Yazen assured her the attack was “not actually linked to Mounjaro”. However, the manufacturer’s patient information leaflet warns that gallstones are a common side effect of tirzepatide when used for weight management, affecting up to 1 in 10 people. Collins herself has been cautious about attribution, saying she cannot prove the medication caused the issue but that she had never experienced such problems before.
She later said she planned to try microdosing to manage side effects while continuing her progress.Quick Bio: Gemma Collins
The Banned Advertisement
In July 2025, the UK Advertising Standards Authority (ASA) banned an Instagram post Collins published on 6 January 2025 promoting the weight loss service Yazen. The post stated she was “two sizes down, thanks to Yazen’s weight loss app and medication”.
The ASA upheld complaints that the ad breached the advertising code by promoting prescription-only medicines to the public, which is illegal in the UK. Although the post did not name a specific drug, it referenced “weight loss medication” and stated it “is prescribed on the NHS,” which the ASA determined would lead consumers to request prescription medication. Collins accepted the ruling and said she would follow ASA guidance in future.
Personal Goals for 2026
Collins has confirmed she plans to marry Rami Hawash and pursue having a baby in 2026. In a New Year social media post, she wrote: “Yes I’m getting married this year and YES I’m having a baby”.
She has been open about fertility challenges, including polycystic ovary syndrome (PCOS) and multiple miscarriages. A Sky docuseries, Four Weddings and a Baby, is set to follow her wedding planning and IVF journey. Collins has described the filming process as emotionally raw, saying viewers will see her “broken” rather than performing a character.
What to Take Away
The verified facts of Collins’ weight loss journey are these: she used Mounjaro, lost approximately 3.5 stone, and dropped from a size 26 to a size 20. She experienced a gallbladder attack and gallstones, which her doctors did not link to the medication, though the manufacturer lists gallstones as a common side effect. Her Instagram advertisement for Yazen was banned by the ASA for illegally promoting prescription-only medicines. Her stated goals for 2026 are marriage and motherhood.
The figures cited are self-reported by Collins and have not been independently verified. Prescription weight loss medications should only be used under medical supervision.
Frequently Asked Questions
How much weight has Gemma Collins actually lost?
Collins has reported losing approximately 3.5 stone (about 22 kilograms) since starting weight loss injections roughly a year ago. She has dropped from a UK dress size 26 to a size 20. She has stated her ultimate goal is to lose 6 stone before her wedding, though she insists the motivation is health rather than thinness .
What drug did Gemma Collins use and what were the side effects?
She used Mounjaro (tirzepatide), a prescription medication licensed by the NHS for weight loss. She described the drug as “life-changing” for curbing appetite, but experienced a gallbladder attack in August after increasing her dose to 15mg. A scan revealed gallstones. She later paused the injections and planned to try microdosing to reduce side effects .
Why was Gemma Collins’ Instagram ad banned?
The UK Advertising Standards Authority (ASA) banned her 6 January 2025 Instagram post promoting the weight loss service Yazen. Although the post did not name a specific drug, it referenced “weight loss medication” and stated it “is prescribed on the NHS,” which the ASA ruled constituted illegal advertising of prescription-only medicines to the public .
What are Gemma Collins’ plans for 2026?
She has confirmed she plans to marry fiancé Rami Hawash and pursue having a baby through IVF in 2026. Collins, who has polycystic ovary syndrome (PCOS), has been open about past miscarriages and fertility struggles. A Sky docuseries, Four Weddings and a Baby, will follow her wedding planning and IVF journey .
