Singapore has one of the longest life expectancies in the world, and one of the widest gaps between how long people live and how long they live well. The conditions responsible for that gap are not exotic. Ischaemic heart disease, stroke and diabetes together account for a very large share of premature death and disability here, and all three share the same upstream drivers.
Three numbers sit behind almost all of it: your blood pressure, your cholesterol, and your blood sugar. None of them hurt. None of them announce themselves. Each can be measured in under an hour, and each responds to treatment. The reason they still cause so much damage is not that medicine cannot fix them, it is that most people do not find out their numbers until something has already gone wrong.
Why these three, and why silence is the problem
Singapore's National Population Health Survey has repeatedly found that a substantial proportion of adults living with raised blood pressure, raised cholesterol or diabetes were unaware of their condition before being tested. That is the entire problem in one sentence. These conditions are not rare and they are not undetectable. They are simply invisible without a test.
There is a second issue specific to this part of the world. Metabolic disease presents earlier in South and East Asian populations, and at lower body weights, than the thresholds derived from European populations would predict. A man of thirty-five in Singapore with a body mass index of twenty-four, a desk job and a habit of eating late can already have insulin resistance, a fatty liver and an atherogenic lipid profile while looking entirely unremarkable. The waist-to-height ratio is often a better warning sign here than BMI: if your waist measures more than half your height, you carry more visceral fat than your weight suggests.
Blood pressure: the most treatable and most neglected
Blood pressure is the force your circulating blood exerts against the artery walls. It is reported as two numbers, systolic over diastolic, measured in millimetres of mercury. Systolic is the pressure at the moment the heart contracts, diastolic the pressure between beats.
Sustained high pressure is mechanical damage. It thickens and stiffens arterial walls, accelerates plaque formation, enlarges the left ventricle until it begins to fail, scars the filtering units of the kidneys, and damages the small vessels of the retina and brain. It is the leading modifiable cause of stroke, and it produces no symptoms whatsoever until the damage is advanced. The occasional headache or nosebleed that people associate with high blood pressure is unreliable folklore. Most people with dangerous readings feel entirely normal.
What the numbers mean
| Reading | Category | What it means |
|---|---|---|
| Below 120/80 | Optimal | Nothing to do beyond maintaining it |
| 120 to 139 / 80 to 89 | Elevated | Lifestyle change now, monitor regularly |
| 140 to 159 / 90 to 99 | Stage 1 hypertension | Confirm over multiple readings, treat |
| 160/100 or above | Stage 2 hypertension | Prompt medical review and treatment |
A single high reading in a clinic is not a diagnosis. Anxiety, caffeine, a rushed walk from the MRT and a full bladder all raise readings. Diagnosis normally requires repeated measurement, often with a home monitor over a week or with ambulatory monitoring, which also uncovers the opposite problem: masked hypertension, where clinic readings are fine but pressure runs high through the working day.
What actually lowers it
Sodium reduction produces some of the biggest gains in Singapore, where the average intake sits well above recommended levels and most of it comes from sauces, stocks, preserved ingredients and hawker cooking rather than the salt shaker. Weight loss lowers pressure roughly one point per kilogram lost in the early stages. Regular aerobic exercise, alcohol reduction, potassium-rich vegetables and adequate sleep all contribute measurably. Where lifestyle is not enough, modern antihypertensives are inexpensive, well tolerated and among the most evidence-backed drugs in medicine. Declining medication in order to "try harder naturally" for another two years is a decision with a real cost in arterial damage.
Cholesterol: the number and the particle
Cholesterol itself is not the villain. Your body needs it for cell membranes, hormones and bile. The problem is the delivery system. Cholesterol travels in lipoprotein particles, and the ones wrapped in apolipoprotein B, principally LDL, are the ones that penetrate the artery wall and get retained there. Every atherosclerotic plaque begins with an apoB particle depositing its cargo where it should not be.
A standard lipid panel reports total cholesterol, LDL, HDL and triglycerides. LDL is the primary treatment target and the one with the clearest causal evidence: lower it, and cardiovascular events fall, consistently and dose-dependently across dozens of trials. HDL is more complicated than the "good cholesterol" label suggests. Low HDL marks risk, but raising it pharmacologically has not reduced events. Triglycerides largely reflect diet, alcohol, visceral fat and insulin resistance, and respond quickly to changes in all four.
Targets depend on your risk
There is no single correct LDL for everyone. A healthy thirty-year-old with no other risk factors and a low ten-year risk score is treated differently from a fifty-five-year-old smoker with diabetes and a family history of early heart attack. Broadly, the higher your overall risk, the lower your LDL target should go. For people who have already had a cardiovascular event, guidelines now push LDL below 1.8 mmol/L and in some cases below 1.4.
Two additional markers are worth knowing about because they change the picture for individual patients. ApoB counts the actual number of atherogenic particles rather than the cholesterol inside them, and is a better risk marker than LDL when the two disagree, which happens most often in people with insulin resistance. Lipoprotein(a) is a genetically fixed, independent risk factor that a standard panel does not measure at all and that roughly one in five people has at an elevated level.
What moves cholesterol
Saturated fat reduction, soluble fibre, oily fish, weight loss and exercise all improve the panel, though the size of the effect varies a great deal between individuals because so much of LDL is genetically set. Dietary cholesterol itself, the egg question, matters far less than the food industry once implied. Where lifestyle change is insufficient or baseline risk is high, statins remain the most cost-effective preventive medication available, with ezetimibe and, in selected cases, PCSK9 inhibitors available when statins alone do not reach target.
Diabetes: the one that quietly damages everything
Type 2 diabetes is not simply "high sugar". It is the end stage of a long process in which cells stop responding properly to insulin, the pancreas compensates by producing more, and eventually cannot keep up. That process runs for years, often a decade or more, before glucose crosses the diagnostic line. During that time, the elevated insulin itself is already promoting hypertension, fatty liver, dyslipidaemia and arterial injury.
Singapore has been unusually direct about the scale of the problem, declaring a national war on diabetes and investing heavily in screening and prevention. Prevalence among Singaporean adults is high by developed-country standards, and again the risk is not evenly distributed: people of Indian and Malay ethnicity carry a higher burden than the Chinese majority, and Asian populations generally develop diabetes at lower BMI thresholds than European ones.
How it is diagnosed
| Test | Normal | Prediabetes | Diabetes |
|---|---|---|---|
| Fasting glucose | Below 6.1 mmol/L | 6.1 to 6.9 mmol/L | 7.0 mmol/L or above |
| HbA1c | Below 6.0 percent | 6.0 to 6.4 percent | 6.5 percent or above |
| 2-hour OGTT | Below 7.8 mmol/L | 7.8 to 11.0 mmol/L | 11.1 mmol/L or above |
HbA1c reflects average glucose over roughly three months and is not affected by what you ate yesterday, which makes it the most practical single marker. Fasting glucose is cheaper but a single value can miss people whose problem is post-meal spikes. Where the two disagree, an oral glucose tolerance test settles it.
Prediabetes is the opportunity
The prediabetes range is where the leverage is. Large trials have shown that intensive lifestyle intervention at this stage reduces progression to diabetes by more than half, and outperforms metformin. Weight loss of five to ten percent, resistance training twice a week, a reduction in refined carbohydrate and a serious look at sleep and alcohol will move HbA1c meaningfully within three months. A prediabetes result is not a mild version of bad news, it is the last easy exit.
How the three feed each other
Treating these as three separate problems misses the point. Insulin resistance raises triglycerides, lowers HDL and produces small dense LDL particles that are more atherogenic than their cholesterol content suggests. Visceral fat drives both insulin resistance and hypertension. High blood pressure accelerates the arterial damage that LDL initiates. A man with all three is not carrying three times the risk, he is carrying considerably more, because the mechanisms multiply.
The corollary is encouraging. Interventions that address one usually address all three. Losing ten percent of body weight lowers blood pressure, improves HbA1c, drops triglycerides and reduces visceral fat simultaneously. Consistent resistance training improves glucose disposal independent of weight change. Cutting alcohol improves blood pressure, triglycerides, sleep and liver function in one move.
What to measure, and when
A basic assessment of all three requires a fasting blood sample, a blood pressure measurement and about ten minutes of history. That is not an expensive or elaborate investigation. For most men without symptoms or risk factors, a check every two years from the age of thirty is reasonable, moving to annual from forty. Bring that forward if you have a first-degree relative with early heart disease, diabetes or stroke, if you carry central weight, if you have gestational diabetes in the family, or if you belong to a higher-risk ethnic group.
What turns numbers into outcomes is the consultation that follows. Three markers read in isolation tell you very little. Read together, with your family history, your waist measurement, your alcohol intake and your sleep, they produce a risk picture and a plan with a review date attached.
Related reading: health screening in Singapore, obesity and metabolic risk, and how weight management improves your health.
Frequently Asked Questions
Q: I feel completely healthy. Do I really need to check these numbers?
A: Feeling healthy is the normal state for someone with early hypertension, high cholesterol or prediabetes. All three are silent by design, and the symptoms people associate with them tend to appear only after organ damage has begun. The purpose of testing is precisely to find these conditions in people who feel fine, because that is when they are cheapest and easiest to reverse.
Q: At what age should I start screening in Singapore?
A: For most men, thirty is a sensible starting point for a first baseline, with repeat testing every two years and annually from forty. Start earlier if you have a family history of early heart disease, stroke or diabetes, if your waist exceeds half your height, or if you are of South Asian or Malay ethnicity, given the earlier onset of metabolic disease in these groups.
Q: Can I reverse prediabetes without medication?
A: Frequently, yes. Trial evidence shows structured lifestyle intervention at the prediabetes stage reduces progression to type 2 diabetes by more than half, and does so more effectively than metformin. The elements that matter are weight loss in the region of five to ten percent, resistance training, reduced refined carbohydrate and improved sleep, sustained rather than attempted for six weeks.
Q: If I start blood pressure medication, am I on it for life?
A: Not necessarily. People who lose substantial weight, reduce sodium meaningfully and cut alcohol sometimes reduce or stop medication under supervision. That said, treating hypertension is not a failure of willpower and delaying treatment while hoping for lifestyle results causes measurable arterial damage in the interim. The usual approach is to treat now and reassess later, not the reverse.
Q: My cholesterol is high but my father lived to ninety. Does family history override the number?
A: A long-lived parent is genuinely reassuring, but it does not neutralise a causal risk factor. Longevity in one relative reflects the whole genetic and environmental package, not permission to ignore a specific abnormality. The better use of family history is as an amplifier: early disease in relatives raises your risk, absence of it modestly lowers it, and neither replaces measuring and treating what is actually in your blood.
Q: Which single test gives the most information?
A: If you could only have one, HbA1c is arguably the most informative single blood marker because it reflects three months of glucose handling and correlates with the metabolic dysfunction underlying much of the rest. But blood pressure costs nothing to measure and is the leading modifiable cause of stroke, so in practice the honest answer is that the combination is what matters, and no single number substitutes for it.
Book a comprehensive health screening at our Orchard clinic or speak to a doctor about your cardiovascular and metabolic risk.