Screen for Life (SFL), Singapore's national subsidised screening programme administered by the Health Promotion Board (HPB), tests for the markers most likely to catch a population-level disease burden early: HbA1c for diabetes risk, a standard lipid panel for cardiovascular risk, blood pressure for hypertension, and body mass index. For a health-literate Singaporean who already knows what ApoB is, that panel answers a different question than the one they are asking.
SFL was designed for population surveillance, not longevity optimisation. The two goals are related but distinct. What follows is a list of six biomarkers absent from the SFL panel that carry meaningful signal for metabolic and cardiovascular ageing — including where to get them in Singapore, what they cost in 2026, and how polyclinics and CHAS eligibility factor into access.
What Screen for Life Actually Covers
The full SFL panel includes HbA1c (a three-month average of blood glucose, used to screen for pre-diabetes and diabetes), a lipid panel (total cholesterol, HDL, LDL, and triglycerides), blood pressure measurement, and body mass index. Singaporeans aged 18 and above qualify for subsidised screening every three years, with annual screening available for those with identified risk factors. CHAS (the Community Health Assist Scheme) card holders receive additional fee offsets at participating GP clinics and polyclinics.
This is a solid disease-surveillance toolkit. It is not a longevity biomarker panel.
1. ApoB — the Marker Your Lipid Panel Approximates but Does Not Measure
What it is: Apolipoprotein B (ApoB) is the structural protein carried on every atherogenic lipoprotein particle — LDL, VLDL, IDL, and Lp(a). One particle carries exactly one ApoB molecule, so an ApoB measurement is a direct count of atherogenic particles in circulation.
Why the SFL lipid panel falls short: LDL-C, the cholesterol concentration measured by the standard panel, is an imperfect proxy for ApoB. In people with insulin resistance or elevated triglycerides — both common in Singapore's food environment — LDL-C systematically underestimates particle burden because insulin resistance shifts the LDL distribution toward smaller, denser, more atherogenic particles at lower total cholesterol concentrations. The research confirms that ApoB is a stronger predictor of atherosclerotic cardiovascular disease than LDL-C in this population subgroup, based on large cohort studies published in JAMA and the Journal of the American College of Cardiology.
Standard clinical range: below 130 mg/dL
Longevity-optimised range: below 80 mg/dL (below 60 mg/dL in high-cardiovascular-risk profiles)
In Singapore: ApoB is available as a standalone test at most private labs. Approximate cost: $30–50 SGD (2026). A polyclinic GP can order ApoB if clinical need is documented — it is not automatically added to SFL panels but is available through the standard order system.
2. Fasting Insulin — the Earliest Measurable Signal of Insulin Resistance
What it is: Fasting insulin measures the pancreas's baseline output after at least eight hours without food. When cells become less responsive to insulin, the pancreas compensates by producing more — keeping blood glucose normal while fasting insulin climbs. HbA1c only rises once the pancreas can no longer compensate.
Why it matters here: The research confirms that elevated fasting insulin precedes HbA1c elevation by five to fifteen years in prospective cohort data. In a food environment that includes kopi-C (coffee with condensed milk, carrying the sugar equivalent of approximately four to six teaspoons per cup), char kway teow, and roti prata consumed as morning staples, postprandial insulin load is structurally high for many Singaporeans — even those with entirely normal HbA1c on SFL screening.
Standard clinical range: 2.6–24.9 µIU/mL
Longevity-optimised range: below 8 µIU/mL
In Singapore: Not included in any subsidised screening panel. Available at most private labs as a standalone test. Approximate cost: $20–40 SGD (2026). The test requires the same fasted blood draw as HbA1c, so it can be added to an SFL appointment at a private GP clinic willing to order it alongside the subsidised markers — ask at booking rather than at the appointment itself.
3. hsCRP — Systemic Inflammation Before Symptoms Appear
What it is: High-sensitivity C-reactive protein (hsCRP) is a marker of systemic, low-grade inflammation. Unlike the standard CRP test — which flags acute infection or injury — hsCRP is sensitive enough to detect the chronic, subclinical inflammation associated with cardiovascular risk and accelerated biological ageing.
The evidence: The research confirms that hsCRP values above 1 mg/L are independently associated with increased cardiovascular disease risk. The Women's Health Study (Ridker and colleagues, New England Journal of Medicine, 2002), which followed approximately 28,000 women over eight years, found that hsCRP outperformed LDL-C as a predictor of major cardiovascular events.
Standard clinical range: below 10 mg/L (acute CRP threshold; for hsCRP specifically, values above 3 mg/L signal elevated cardiovascular risk)
Longevity-optimised range: below 1.0 mg/L
In Singapore: Available at most polyclinics and private labs. The subsidised SFL panel does not include it, but a GP can add it to a polyclinic appointment if clinical rationale is provided. Approximate cost at a private lab: $15–30 SGD (2026).
4. Homocysteine — the Amino Acid That Ages Blood Vessel Walls
What it is: Homocysteine is an amino acid produced during methionine metabolism. Elevated homocysteine damages endothelial cells — the cells lining blood vessel walls — and is associated with increased cardiovascular and cognitive risk. Homocysteine is also sensitive to B vitamin status: deficiencies in B6, B12, or folate raise levels independently of dietary protein intake.
The evidence: The research suggests that elevated homocysteine is an independent cardiovascular risk factor, with consistent observational data across multiple large cohort studies. Direct intervention trials on homocysteine lowering have produced mixed results on hard endpoints, so interpreting an elevated result warrants a broader panel review rather than isolated supplementation — discuss any result above 12 µmol/L with your clinician.
Standard clinical range: below 15 µmol/L
Longevity-optimised range: below 10 µmol/L
In Singapore: Not part of any subsidised panel. Available at most private labs. Approximate cost: $25–50 SGD (2026).
5. Cortisol — the Stress Marker That Moves Every Other Marker
What it is: Cortisol is the primary glucocorticoid hormone produced by the adrenal glands. Chronically elevated cortisol — from sustained work stress, poor sleep, or disrupted circadian rhythm — raises fasting glucose, suppresses immune function, degrades muscle protein, and increases visceral fat deposition. In Singapore's long-working-hours environment, dysregulated cortisol is underdiagnosed precisely because it does not appear on any standard screening panel.
Standard clinical range for morning serum cortisol: 138–635 nmol/L
Longevity-optimised context: A morning peak in the range of 350–500 nmol/L followed by a clear diurnal decline by evening is more informative than the single peak value. The research suggests that a four-point salivary cortisol measurement (morning, midday, afternoon, evening) has stronger predictive validity for adrenal dysregulation than a single morning serum reading.
In Singapore: Morning serum cortisol is available at polyclinics and private labs when a clinician orders it. Approximate cost at a private lab: $25–50 SGD (2026). Four-point salivary cortisol panels are available through functional medicine clinics; costs vary and are higher.
6. Lipoprotein(a) — the Cardiovascular Risk Factor You Cannot Diet Your Way Out Of
What it is: Lipoprotein(a), written as Lp(a) and pronounced “L-P-little-a,” is a lipoprotein variant that is genetically determined at birth. High Lp(a) — above 50 mg/dL, or 125 nmol/L — is independently associated with increased atherosclerotic cardiovascular disease risk and aortic valve stenosis. Unlike LDL-C, Lp(a) does not respond meaningfully to diet or exercise. If it is elevated, knowing that fact changes the risk calculation.
The evidence: The research confirms that elevated Lp(a) increases cardiovascular risk independent of LDL-C, with consistent findings from the Framingham Heart Study, the Copenhagen City Heart Study, and Mendelian randomisation analyses published in JAMA Cardiology. Because Lp(a) is genetically fixed, it needs to be tested once — but it needs to be tested.
Standard clinical range: below 75 nmol/L (or below 30 mg/dL, depending on the unit your lab reports)
Longevity-optimised range: below 50 mg/dL (below 125 nmol/L)
In Singapore: Not included in SFL. Available at private labs. Approximate cost: $30–60 SGD (2026).
How to Add These Tests in Singapore
At a polyclinic: Most of these tests can be ordered by a polyclinic GP if you state a clear clinical rationale — family history of cardiovascular disease, suspected insulin resistance, or an SFL result that warrants further investigation. Not all polyclinic GPs will order every marker on a first visit; bring a prepared list and ask specifically rather than expecting the tests to be offered proactively.
At a private GP or specialist: Full flexibility to combine any of these markers on a single fasted blood draw. Some private GPs offer named longevity panels that bundle several tests at a negotiated rate.
At a direct-access laboratory: Facilities such as Raffles Diagnostics and Parkway Lab allow self-referral for many markers without a GP visit. Check whether the service includes results interpretation or whether you will need to bring results back to a clinician.
CHAS holders: Subsidies apply to polyclinic consultations and, in some cases, to add-on tests ordered during an SFL visit. The subsidy does not extend to private lab tests ordered independently without a polyclinic referral. Check your CHAS card tier with the receptionist before your appointment, not after.
This list comes from Week 1 of the guide. Download the full 30-day plan to see how it all fits together. wholeliving.com/longevity-guide
