Here’s something nobody tells you when you’re trying to lose weight:
You can do everything right — count your calories, hit the gym, cut the sugar, sleep eight hours — and still feel like your body is working against you. If that sounds familiar, there’s a reason. And it’s not a lack of discipline.
Weight management is not simply a test of character. For many people, it’s a biological challenge — one that diet and exercise alone may not be enough to solve.
The Myth That Won’t Go Away
The idea that weight loss is purely about willpower is one of the most persistent — and damaging — myths in modern health. It places the entire burden on the individual, ignores how the body actually works, and leaves millions of people feeling like personal failures when their biology was working against them all along.
The truth is more complicated, and more compassionate.
Your appetite, your metabolism, your body’s ability to store and burn fat — all of these are regulated by hormones, genetics, gut microbiome, sleep quality, stress levels, and more. When these systems are out of balance, no amount of effort at the dinner table will fully correct them.
This is not an excuse. It’s physiology.
What’s Actually Happening in Your Body
When you restrict calories, your body doesn’t simply shrink. It adapts — sometimes aggressively. Hunger hormones like ghrelin increase, signalling your brain to eat more. Leptin, the hormone that tells you you’re full, can become less effective over time in people with obesity. Metabolism slows as your body defends its weight set-point.
This is why people who have lost weight often describe feeling hungrier than they did before they started — it’s not imagined, and it’s not weakness. It’s a measurable hormonal response.
For some people, these biological forces are strong enough to override even the most consistent lifestyle efforts. This is where medical support becomes not just helpful — but clinically appropriate.
What Weight Loss Medication Actually Does
Weight loss medication is not a shortcut. It is a clinical tool that works with your biology to make sustainable change more achievable.
Dr Andrew Fang, a GP at Doctor Anywhere, explains there are three main types of weight loss medication — each targeting a different aspect of the biological challenge.
Appetite suppressants are the first category. “Like the name suggests, these types of medication help to suppress your appetite. By doing so, you won’t feel as hungry and may not eat as much,” says Dr Andrew. Examples include Saxenda and Duromine — both of which work on the brain’s hunger signalling pathways to reduce the biological drive to overeat.
Fat absorption inhibitors are the second type. “These medications would reduce the amount of fats absorbed from your meals,” Dr Andrew explains. “You’ll usually take a tablet near your mealtimes.” Xenical is the most commonly prescribed example in Singapore, and works directly in the gut to reduce how much dietary fat enters the bloodstream.
Combination medications make up the third category, targeting multiple aspects of weight management simultaneously. “For example, you have Contrave, which helps to suppress your appetite while controlling your food cravings,” says Dr Andrew. This dual mechanism is particularly useful for people who struggle with both hunger and habitual eating patterns.
These medications are administered in two ways. Oral medications like Contrave, Duromine, and Xenical are taken once or twice daily — straightforward to incorporate into a daily routine. Injectable options like Saxenda require self-injection, which Dr Andrew acknowledges “can be a bit more intimidating for someone new” — but which are well-tolerated by most patients once they get started.
You Still Need to Do the Work — But You Don’t Have to Do It Alone
It’s worth being clear: medication is not a replacement for lifestyle change. Dr Andrew is emphatic on this point.
“Weight loss medication has to be paired with healthy lifestyle changes for you to effectively lose weight,” he says. “You’ll have to adopt better eating habits as well as incorporate sufficient physical activity into your daily routine.”
What medication does is change the biological playing field — making it possible for lifestyle efforts to actually gain traction. For many patients, it’s the difference between stalling despite genuine effort, and finally seeing sustainable progress.
Think of it this way: if someone has high blood pressure, we don’t tell them to simply try harder to relax. We treat the underlying biology. Weight management deserves the same seriousness.
Do You Need a Doctor to Get Weight Loss Medication?
Yes — and this is an important safeguard, not a barrier.
“You’ll have to consult a doctor to be prescribed weight loss medication,” confirms Dr Andrew. Weight loss medications are not suitable for everyone. A doctor will assess your age, BMI, medical history, and any underlying health conditions before recommending a treatment plan.
“This will help your doctor assess if weight loss medication is safe and suitable for you,” says Dr Andrew. “Your doctor will work with you to design a treatment plan that is tailored to you, to help you reach your weight goals.”
At Doctor Anywhere, this process is straightforward. You can speak to a GP virtually, from wherever you are, and receive a personalised weight management plan — including a prescription if appropriate. Doctor-prescribed treatments are delivered to your door within 3 hours.
The Bottom Line
If you’ve been struggling with your weight and wondering what you’re doing wrong — consider that the answer might not be about doing more. It might be about understanding what your biology is doing, and getting the right support to work with it rather than against it.
Weight isn’t just willpower. It’s biology. And biology can be treated.
Ready to speak to a doctor about weight management? Consult a DA doctor today — available 24/7, with doctor-prescribed treatments and 3-hour delivery. Start your weight management consultation →
Reviewed by the Doctor Anywhere Medical Team. This article features insights from Dr Andrew Fang, GP at Doctor Anywhere. It is intended for informational purposes and does not constitute personalised medical advice. Please consult a qualified doctor to discuss your individual health needs.
