{"id":27192,"date":"2026-04-04T06:25:43","date_gmt":"2026-04-04T06:25:43","guid":{"rendered":"https:\/\/youskill.us\/?p=27192"},"modified":"2026-04-04T06:25:43","modified_gmt":"2026-04-04T06:25:43","slug":"what-you-need-to-know-before-taking-weight-loss-drugs","status":"publish","type":"post","link":"https:\/\/youskill.us\/?p=27192","title":{"rendered":"What you need to know before taking weight-loss drugs"},"content":{"rendered":"
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Weight-loss drugs are not the quick fix solution that many people believe, especially if you hope to keep the pounds off in the long-term.<\/b><\/p>\n

Sarah Le Brocq has direct experience of the transformative effects of weight-loss drugs. She has lived with obesity for most of her adult life and tried numerous diets. “Anything that came out, I thought, ‘I’ll try that because that might work for me’.” Unfortunately, the weight always came back, she told the BBC’s\u00a0Inside Health.<\/a><\/p>\n

After taking weight-loss drugs for more than two years, she has lost almost eight stone (51kg\/112lb). “All of a sudden I wasn’t thinking about food anymore,” she says. “I’ve just got more energy, I’m doing things I couldn’t do before\u2026 it’s kind of given me a new freedom in life again.”<\/p>\n

Millions of people like Sarah are now accessing medications like semaglutide and tirzepatide, better known by their popular brand names Ozempic and Mounjaro. The numbers of people on weight-loss medication is only likely to increase as\u00a0new drugs<\/a>\u00a0appear on the market too,\u00a0including pills<\/a>\u00a0rather than the current jabs.<\/p>\n

It’s clear that these drugs are opening up a new era in the treatment of obesity. The condition, is now a “mitigatable” issue, David Cummings, professor of medicine at the University of Washington tells me. “They are the closest thing I’ve seen to miracle drugs”.<\/p>\n<\/div>\n<\/div>\n

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Other academics, however,\u00a0warn that we risk<\/a>\u00a0losing sight of the need for behavioural change, especially as weight tends to be regained quickly when people stop taking the drugs.<\/p>\n

So what should anyone planning to use weight-loss medication consider before they start?<\/p>\n

How they work<\/b><\/span><\/h2>\n

Weight-loss drugs work by suppressing an individual’s appetite by mimicking hormones that tell our body when it is full. The most common are known as glucagon-like peptide 1, or GLP-1, and glucose-dependent insulinotropic polypeptide, or GIP.<\/p>\n

The drugs bind to specialised molecules on the surface of our cells known as GLP-1 and GIP receptors, which play a key role in telling our body when it has had enough food.<\/p>\n

Typically someone taking these drugs will begin to\u00a0lose weight within the first few weeks<\/a>. Although the drugs are only approved for weight loss in people with obesity, there is a rapidly\u00a0growing private market<\/a>\u00a0for those not considered clinically obese.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Their popularity has been rising because they are extremely effective, with weight loss of between\u00a014-20% in 72 weeks<\/a>. But\u00a0about 10-15% of people<\/a>\u00a0lose\u00a0very little weight<\/a>, so called “non-responders<\/a>“.<\/p>\n

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\"GettyGetty Images<\/span><\/div>
Weight-loss drugs that mimic the action of GLP-1 can help people lose weight quickly, but keeping it off in the long term is more challenging (Credit: Getty Images)<\/figcaption><\/figure>\n

GLP-1s are like “a chemical shield” that protects individuals against our “modern obesogenic environment<\/a>, filled with cheap, calorie-dense foods”, says Naveed Sattar, a professor of cardiometabolic medicine at the University of Glasgow and leads the UK\u00a0Government’s Obesity Healthcare Goals programme<\/a>. He\u00a0has also consulted on<\/a>\u00a0medical trials with several companies who produce weight-loss drugs but does not own any shares.<\/p>\n

“There’s food everywhere,” he says \u2013 and within half an hour anyone “can pick up the phone and order 10,000 calories of food”.<\/p>\n

If you stop, you’ll gain weight<\/b><\/span><\/h2>\n

If someone living with obesity starts to take weight-loss drugs, they need to consider that they may be on the drug long-term, says Cummings, who runs a weight management programme for individuals with obesity who have BMIs of 50 and above.<\/p>\n<\/div>\n<\/div>\n

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A common question he is asked by his patients before they start taking a weight-loss drug is how long they will be on it. Typically, they stop taking the drugs after about a year, he says.\u00a0One analysis<\/a>\u00a0of scientific studies involving more than 9,000 patients indicated the average treatment duration was 39 weeks. People believe they can continue to lose weight using their willpower, he says, but the\u00a0evidence suggests<\/a>\u00a0that is not the case.<\/p>\n

People stop for various reasons, either due to the expense of treatment, their insurers stopping coverage or individuals not wishing to be on drugs for a prolonged period of time, Cummings has found.<\/p>\n

And when people do stop the drugs, their\u00a0weight tends to rebound<\/a>. A recent study found that\u00a0weight regain happens up to four times more quickly<\/a>\u00a0after stopping weight-loss drugs compared to someone ending a weight-loss programme that focuses on changing their behaviour.<\/p>\n

Another study found that those on weight-loss drugs gained\u00a01.5kg (3.3lbs) eight weeks after they stopped the medication<\/a>, with their weight continuing to climb with the more time that passed. The same study also found that other health concerns, such as high blood pressure, also returns. New research has also found that people who stop taking weight-loss drugs\u00a0gain back around 60% of the weight<\/a>\u00a0they lost a year later.<\/p>\n

It returns quickly because of something researchers call “food noise<\/a>“, which consists of persistent and intrusive thought around food, says Sattar.<\/p>\n

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When there’s a lack of behavioural and lifestyle support for those on weight-loss drugs, it can leave individuals vulnerable to nutritional deficiencies<\/span><\/div>\n

Hormones play a role too. When an individual tries to lose weight, it triggers a\u00a0powerful hormonal response<\/a>\u00a0that tells your body to regain the weight you lost. Cummings explains that because of this, the brain interprets a calorie drop as an energy deficiency, so after stopping weight-loss drugs, hormones that stimulate appetite increase while the rate at which you burn energy \u2013 the metabolic rate \u2013 decreases. “If these biological defences are strong enough, they can blunt the drug’s effectiveness,” he says.<\/p>\n

Lifestyle change<\/b><\/span><\/h2>\n

Sattar has observed that for a small proportion of people who make lifestyle changes, it may be possible to reduce the dose or use the drug intermittently instead. Some really do make “fundamental changes in their diet”, he says.<\/p>\n

“Others might need it at a lower dose than they would when they started. But the majority will probably still need some dose of the drug because the [food] environment is still the same.”<\/p>\n

There’s also increasing concern that individuals are taking weight-loss medication as a substitute for making life-style changes \u2013 even though evidence shows that\u00a0modifying lifestyle in combination with weight-loss drugs<\/a>\u00a0is what will lead to greater weight loss.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Experts have recently cautioned in a scientific review of the evidence that when there’s a lack of behavioural and lifestyle support for those on weight-loss drugs,\u00a0it can leave individuals vulnerable to nutritional deficiencies.<\/a>\u00a0“We need to make sure people are getting enough protein and are getting all the vitamins and minerals they need,” says Marie Spreckley a nutrition and behavioural scientist at Cambridge University and lead author of the report. “You don’t want to have longer-term unintended consequences, like frailty and muscle loss. We don’t want to replace one health concern with another.”<\/p>\n

Because these medications cause a dramatic appetite reduction, patients tend to eat less overall, she and her colleagues note. This can lead to a “missed opportunity” if patients are not supported long-term and their food choices remain poor.<\/p>\n

No quick fix<\/b><\/span><\/h2>\n

The World Health Organization has therefore stated<\/a>\u00a0that medication alone won’t “reverse the obesity challenge”. Early interventions, screening and creating healthier environments are also needed,\u00a0the organisation has stated in its guidelines on using GLP-1 drugs<\/a>.<\/p>\n

This is easier when people are still taking the drugs, Sattar says. “You have more mental space to think about your diet.”<\/p>\n

But behavioural change is\u00a0extremely challenging<\/a>, says\u00a0Amanda Daley, a professor of behavioural medicine at Loughborough University in the UK. She says there needs to be better communication with patients about how quickly they can regain weight once they stop taking GLP-1 medication.<\/p>\n

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Obesity is a chronic, relapsing condition, she says, which means it cannot be “cured” with a drug alone. That’s why additional support and “wraparound care” is key to ensure patients make dietary changes as well as increasing their physical activity.<\/p>\n

It’s unclear whether private providers are providing this crucial additional support, she says, which she finds concerning since\u00a0so many people access the drugs privately<\/a>\u00a0and it is hard to monitor continuation of care.<\/p>\n

Micro-nudges help change behaviour<\/b><\/span><\/h2>\n

To overcome some of this \u2013 researchers at Stanford have looked at how they can help support and encourage lifestyle changes. In one recent study, researchers tested whether\u00a0small nudges \u2013 or “microsteps” \u2013 could help encourage healthy behavioural change<\/a>\u00a0for those taking GLP-1 medications.<\/p>\n

The tiny changes focused on nutrition, physical activity, sleep and stress management. Crucially, the microsteps were small and manageable, such as swapping sugary drinks for water, no longer drinking coffee after lunch, taking a deep breath when stressed or popping outside for five minutes.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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They found these helped improve behavioural expectations. It’s this “expectation” that’s a first necessary step for behavioural change, says Maya Adam, a clinical associate professor of paediatrics at Stanford School of Medicine, who was involved in the study.<\/p>\n

“Achieving your best health involves a lot more than pharmacotherapy alone,” she says. “We found that giving people these little nudges may be very effective.” She calls these steps “too small to fail” because even small daily changes and habits make a real difference over time.<\/p>\n

Side-effects<\/b><\/span><\/h2>\n

These kind of interventions are crucial to help give people the tools they need to enact change, Daley says, especially considering the known side effects. These include gastrointestinal issues. There has also been an observed increase in pancreatitis and\u00a0gallstones<\/a>.\u00a0Muscle loss is another concern<\/a>, especially among individuals who are not exercising. Recently a study found links to\u00a0bone and joint conditions too<\/a>.<\/p>\n

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In one major study, the drugs were linked to better heart health, fewer infections, lower risk of drug abuse and lower incidences of dementia<\/span><\/div>\n

While we now have several years of data on the effectiveness of GLP-1 drugs, we don’t yet know what the long-term outlook will be or whether the results will wear off over time. There is also a lack of data on how these drugs affect pregnancy outcomes or future generations, as the advice is\u00a0not to take weight-loss drugs during pregnancy<\/a>.\u00a0\u00a0<\/b><\/p>\n

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But given the negative health outcomes for those living with obesity, the side effects pale in comparison, both Sattar and Cummings say. This is particularly the case for individuals with multiple weight-related conditions. Heart disease, cancer and stroke are the\u00a0leading causes of death worldwide<\/a>\u00a0\u2013 and all are linked to obesity.<\/p>\n

A changing landscape<\/b><\/span><\/h2>\n

What is clear is that the landscape for weight-loss medication is rapidly evolving.<\/p>\n

There are other health benefits too<\/a>\u00a0beyond weight loss. In one major study involving two million people, the drugs were linked to better\u00a0heart health, fewer infections, lower risk of drug abuse and lower incidences of dementia<\/a>. It’s also been shown to improve\u00a0sleep apnoea<\/a>,\u00a0arthritis<\/a>\u00a0and substance abuse<\/a>.<\/p>\n

More like this:<\/b><\/p>\n

\u2022\u00a0Counting calories doesn’t work. Try eating smarter instead<\/a><\/p>\n

\u2022\u00a0Is it possible to lose weight on an “Ozempic diet”?<\/a><\/p>\n

\u2022\u00a0What happens when you stop taking weight-loss drugs?<\/a><\/p>\n

A new drug called retatrutide has also shown promise in recent trials. It mimics three hunger-regulating hormones, and\u00a0early evidence indicates weight loss of nearly 29%, after 68 weeks according to manufacturer Eli Lilly.<\/a><\/p>\n

The drugs are but one tool for obesity care, Daley says. More important is the need to make it easier for people to make healthier changes that last beyond medication. And because of the abundance of people eating calorie-dense ultra-processed foods,\u00a0obesity will continue to be a growing health concern<\/a>, experts warn.<\/p>\n

Our ultimate goal, Daley adds, should be to change the food environment to offer better choices and influence government policy so that the next generation won’t need these drugs at all.<\/p>\n

*\u00a0<\/i>Melissa Hogenboom<\/i><\/a>\u00a0is a senior health correspondent at the BBC and author of\u00a0<\/i>Breadwinners<\/i><\/a>\u00a0(2025) and The Motherhood Complex.<\/i><\/p>\n

—<\/p>\n

For\u00a0trusted insights on health and wellbeing, sign up to the<\/i>\u00a0Health Fix newsletter<\/i><\/a>\u00a0by senior health correspondent Melissa Hogenboom who also writes the<\/i>\u00a0Live Well For Longer<\/i><\/a>\u00a0and<\/i>\u00a0Six Steps to Calm<\/i><\/a>\u00a0courses.<\/i><\/p>\n

For more science, technology, environment and health stories from the BBC, follow us on\u00a0<\/i>Facebook<\/i><\/a>\u00a0and\u00a0<\/i>Instagram<\/i><\/a>.<\/i><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Weight-loss drugs are not the quick fix solution that many people believe, especially if you hope to keep the pounds off in the long-term. Sarah Le Brocq has direct experience of the transformative effects of weight-loss drugs. She has lived with obesity for most of her adult life and tried numerous diets. “Anything that came … <\/p>\n

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