The truth about diet pills

This Sunday, Sally talks you through the truth behind diet pills – do they actually work? And how safe are they really? Also this week, how choosing who you dine with could help with weight loss, and the latest campaign helping smokers to quit – for good!

Speak to almost any medical professional and they will tell you that taking diet pills simply isn’t an option they would recommend for safe, effective weight loss. But why are diet pills so bad for you? Well, where do I start?!

First and foremost there is no evidence that diet pills actually work.

Think about it for a minute. The current obesity crisis is threatening to cripple the NHS due to the costs of treating obesity-related disease. If there was a drug that effectively and safely helped people lose weight, do you think the NHS would be keeping it a secret?! Or don’t you think GPs would be offering it to every one of the 60% or so of us who are currently overweight, or at least the 25% who are obese? Don’t you think the drug companies would be covering every billboard and magazine page with adverts for the ‘cure’ … they would stand to make a fortune. A diet-pill that actually works is the ‘holy grail’ of medicine that everyone is searching for – and as yet, nobody has found!

ditch-cake-womanThere is only one drug that is prescribed specifically for weight-loss in the UK (the other was withdrawn due to the risk of side-effects). This drug, Orlistat, works by stopping you absorb fat from your intestine….therefore you end up taking in fewer calories. What’s the downside? If you eat fatty food and don’t absorb it properly you get unpleasant wind and diarrhoea (and occasionally incontinence!)… with the net result that many of my patients will simply not take the drug if they fancy a fatty meal. So, instead of needing willpower not to over-indulge, you simply need the willpower to make yourself take the drug that will put you off over-indulging. Hmmm… not a great premise for a successful treatment. As a result, weight loss with this drug is modest, and is often regained once the drug is stopped. Add to that the fact that healthy fats (and the vitamins we absorb with them) are good for us in moderation and you will see why I don’t prescribe it.

There are a few other drugs being approved in the US that help suppress the appetite….but let’s face facts. Most of us who are overweight don’t just overeat because we are hungry! It’s the other reasons – habits, emotions, an unstoppable urge for chocolate or chips – that lead to the pounds creeping on. Reducing our appetite probably won’t change that at all!

To help you lose weight, drugs pretty much have to do one of these three things:

  • Alter the way your brain functions so you eat less
  • Alter the way your intestines function so you absorb less
  • Increase your metabolism so you burn more

The problem is that drugs are not selective enough to target the specific areas that are purely responsible for weight gain… and we don’t really understand what they are anyway! So, it’s no surprise that drugs that help us to lose weight often interfere with other functions of the body – possibly in unwelcome ways. So drugs that ‘boost the metabolism’ by raising your pulse rate can put you at risk of heart problems, palpitations, headaches and high blood pressure. Drugs that act by reducing depression or trying to reduce appetite may cause mood swings, sleep disturbance or increase the chance of serious problems like strokes. And drugs that make you absorb less …well I won’t repeat their antisocial side effects!

diet-tag-cloudAt least you know what you are getting if you have a prescribed drug, as the possible side-effects and risks are listed ad infinitum. But buying diet-pills over the internet means you have no idea what they really contain and whether they could interact with drugs you may already be taking, or make an existing health problem worse. We heard the sad story of Eloise Parry who died after taking dinitrophenol, or DNP. DNP is a toxic chemical declared unfit for human consumption by the Food Standards Agency. Ingesting this poison can lead to nausea, vomiting, restlessness, flushed skin, sweating, dizziness, headaches, rapid respiration and irregular heart-beat, possibly leading to coma and death. Despite this, it appears that these drugs are being made in clandestine laboratories before being marketed to vulnerable people, desperate for that miracle solution to their (sometimes imaginary) weight problem.

So, don’t play with your health. Yes, being overweight may be a risk – but don’t swap that risk for a diet-pill that may be a lot worse for you and probably doesn’t work anyway! And, as soon as that miracle diet-pill – one that honestly leads to safe and significant weight-loss – becomes available, you will be the first to know!!


As our VavistaLife Programme users will know, what we eat and why, are both contributing factors to our weight. But did you know that who we eat with could also have a pretty big effect on our weight loss attempts?

friendsAccording to a recent study from the UNSW School of Psychology, eating with people who consume less could have an impact on how much we choose to eat ourselves. In the study, researchers analysed 38 previous studies on the amount of food people ate when in company, and found that those whose eating companion ate less, consumed a smaller amount than they would normally. It makes sense really – we can’t always rely on (or don’t listen to) our own internal hunger signals, and so by taking note of how much others are eating can help us decipher how much we should be eating. If the people you are eating with are consuming more, then we feel like we’re allowed to eat more, leading us to ignore our own feelings of fullness in favour of indulging in another forkful or two!

I’m not saying you should choose to ditch eating with friends who tend to overindulge, but it’s definitely worth taking into account! Perhaps seat yourself next to one of the lighter eaters in the group, or aim to act as an example by eating less than you normally might. Your body – and your friends – may thank you for it in the long term!

Lenny R. Vartanian, Samantha Spanos, C. Peter Herman, Janet Polivy. Modeling of food intake: a meta-analytic review. Social Influence, 2015


Let’s be frank, we all know that smoking is bad for us, and those who’ve successfully managed to quit the habit will know all about the positive effects that quitting smoking can bring – not only for your own health, but for those around you too. Which is why I find it so encouraging to see initiatives and campaigns helping even more people to quit – for good. Our own willpower simply isn’t always enough when it comes to beating addictions like smoking, and a bit of help and support goes a long way!!

This most recent campaign, “Ex-smokers are unstoppable” offers free help for those who want to quit smoking through iCoach, a free online app that helps users to celebrate their various milestones when it comes to quitting smoking and encourages them to engage in online communities where they can get support from people who are going through exactly what they are. The app is free to download on iOs or Android – something I highly recommend doing if you’re thinking about quitting and think you might need some support.