Taking maximum doses of weight-loss jabs may be pointless, scientists have found, as patients shed just as much weight with lower strength injections.Researchers found that those taking the highest dosage of Mounjaro lose just a pound extra on average compared to those on mid-strength jabs over six months.And patients on medium doses of Wegovy achieve similar fat loss as those taking the maximum amount over 18 months.The results could see slimmers save up to £80 a month – or £960 a year – as high strength doses are significantly more expensive. Estimates suggest more than 1.6million people in the UK use the injections, most of whom pay for them privately.Sticking to lower doses may also reduce the risk of severe side effects, research suggests.The first study, conducted by digital healthcare company HeliosX, analysed data from more than 630,000 UK users of tirzepatide, sold as Mounjaro. Increasing your dose of blockbuster weight loss jabs to maximum levels may be pointless, scientists have found Mounjaro patients start on a 2.5mg dose before moving up to a stronger jab roughly every four weeks. The second lowest dose is 5mg, followed by 7.5mg, 10mg and 12.5mg. The maximum strength is 15mg. After six months, the researchers found those taking 10mg lost an average of 14.4 per cent of their starting weight.Those who on 12.5mg lost 14.9 per cent, and patients on the maximum 15mg dose had lost 15.1 per cent.Moving from the 10mg to 15mg dose resulted in just 0.7 per cent extra weight loss, on average.This is the equivalent weight difference of roughly 1lb.The 15mg Mounjaro dose can cost patients up to £340 per month, while some online pharmacies charge £260 to £280 for the 10mg and 12.5mg jabs.Commenting on the findings, the authors said that 'many achieved substantial weight loss without reaching the maximum available tirzepatide dose'.They added that the findings – published in the journal Diabetes, Obesity and Metabolism – are 'particularly relevant in the UK context' because most people pay for the drugs privately.Another key finding the researchers discovered was that consistently taking the medication made the jabs more likely to work.