Many annual health packages contain some version of the same list: a complete blood count, fasting glucose, lipid panel, liver and kidney profile, perhaps an electrocardiogram, chest X-ray or treadmill test.
The report arrives. Most values sit inside their reference ranges. Somewhere near the bottom it says “no significant abnormality”. The PDF gets filed away until next year. There is nothing inherently wrong with that process. Some of those tests are useful screening tests.
But good screening is more deliberate than ordering a larger package.
Most conditions that shorten healthy years in India (raised blood pressure, blood sugar rising towards diabetes, kidney filtration decline, fatty liver, cervical and oral cancers) go undetected for years. No pain, no fatigue, nothing that would send a person to a doctor.
Preventive screenings exist to catch the gap between the biology changing, and the body noticing. The screenings below carry enough evidence, or affect enough people in India, to be worth choosing deliberately rather than accepting as part of a default package.
13 Preventive Screenings and Risk Checks Worth Knowing About
1. Blood pressure
- Typical age to start: 18. India’s population-based NCD programme screens annually from age 30.
- How often: Usually annually from 30 in the Indian programme; more often when readings are elevated or risk is higher.
- What it can pick up before symptoms: Sustained hypertension damaging arteries, kidneys, eyes
- Reasons to pay attention earlier: Family history, pregnancy with raised blood pressure, obesity, chronic kidney disease
Raised blood pressure damages arteries, kidneys and the small vessels of the eye without producing symptoms for years. The nationwide ICMR-INDIAB survey published in The Lancet Diabetes and Endocrinology in 2023 measured blood pressure directly in participants, and found hypertension in 35.5% of Indian adults, most of whom had never been diagnosed before.
A single reading taken right after a rushed commute reflects a stressful moment, not a person’s actual blood pressure. An accurate result depends on repeated measurement across several separate occasions, seated and rested.
2. HbA1c or fasting glucose
- Typical age to start: 30
- How frequently should you do this: Annually
- What it can pick up before symptoms: Blood sugar rising above normal before diabetes
- Risk factors that move the start earlier: Family history of diabetes, polycystic ovary syndrome, gestational diabetes, high waist circumference
Glycated haemoglobin, or HbA1c, reflects average blood sugar over roughly the previous three months, which makes it steadier than a single fasting reading. The same ICMR-INDIAB survey estimated prediabetes in 15.3% of adults; meaning their blood sugar has risen above normal but has not yet crossed the threshold for diabetes, usually without any symptom to signal it.
That rise is driven by insulin resistance, where the body needs increasingly more insulin to move the same amount of sugar out of the blood. In Indian adults, insulin resistance tends to appear at lower body weights and younger ages than in Western reference populations – with a high waist circumference – even at a normal weight, acting as an independent warning sign.
This earlier onset is also why the recommended starting age differs. Most Western guidelines, including the American Diabetes Association’s, recommend starting diabetes screening at 45 for someone at average risk. An HbA1c that is still inside the normal range but has been rising over successive tests is still worth attention, not dismissed simply because it falls within range.
3. Lipid panel
- Typical age to start: 30
- How frequently should you do this: Every three to five years if stable
- What it can pick up before symptoms: Cholesterol burden accumulating in artery walls, and exposure to atherogenic lipoproteins long before cardiovascular disease becomes symptomatic
- Risk factors that move the start earlier: Early heart disease in a parent or sibling, diabetes, smoking
A lipid panel is already part of most standard blood work, so the point here isn’t ordering it, but rather reading it as a trend rather than a one-time measure.
A lipid panel measures the cholesterol-carrying particles circulating in the blood, chiefly low-density lipoprotein (LDL), high-density lipoprotein (HDL) and triglycerides. LDL is not just a number at one point in time. It accumulates in artery walls the longer it circulates, so the risk it carries builds with every year of exposure.
Cardiology has a name for this: cumulative LDL burden, sometimes measured as “LDL-years,” similar to how pack-years are used to measure lifetime smoking exposure. A 2017 consensus statement from the European Atherosclerosis Society, reviewing more than 200 meta-analyses and over 2 million participants, found that the total amount of LDL a person carries over their lifetime, not a single reading, predicts whether plaque builds up in the arteries.
4. Lipoprotein(a)
- Typical age to start: Any adult age
- How frequently should you do this: Once in a lifetime
- What it can pick up before symptoms: An inherited, largely fixed cardiovascular risk factor
- Risk factors that move the start earlier: Early heart disease or stroke in the family
Lipoprotein(a) behaves differently from the rest of the lipid panel. Unlike LDL and triglycerides, which respond to diet, exercise and medication, lipoprotein(a) is set almost entirely by a person’s genes: twin and family studies estimate its heritability at 70% to over 90%, making it one of the most strongly inherited traits in cardiovascular medicine. Roughly one in five people worldwide carry a level high enough, at or above 50 mg/dL, to raise cardiovascular risk independent of LDL cholesterol.
India-specific thresholds are not yet settled, so the reference here is European guidance. A 2022 European Atherosclerosis Society consensus statement recommends testing lipoprotein(a) at least once in adult life, since a genetically fixed trait measured once reliably reflects a person’s level for life, and identifies elevated lipoprotein(a) as a causal, independent risk factor for cardiovascular disease.
5. HPV-based cervical screening
- Typical age to start: 30
- How frequently should you do this: Every five to 10 years if negative
- What it can pick up before symptoms: Persistent high-risk HPV infection years before cancer
- Risk factors that move the start earlier: Immunosuppression, HIV, previous abnormal result
Cervical cancer is caused almost entirely by persistent infection with high-risk strains of human papillomavirus (HPV). Most HPV infections clear on their own within one to two years. The ones that matter are the small fraction that persist, since it is this persistence and not the initial infection, that slowly transforms cervical cells over years into cancer.
This is why HPV testing works as an earlier warning system than a Pap smear. A Pap smear looks for cell changes that have already begun. HPV testing looks for the viral infection driving those changes before the cells have changed at all.
WHO’s 2021 guideline recommends HPV DNA testing as the primary cervical screening method for all women, starting at age 30, repeated every five to 10 years when the result is negative. For women living with HIV, whose risk of persistent HPV infection and rapid progression to cancer is higher, the guideline conditionally recommends starting five years earlier, at 25.
HPV vaccination and screening address different windows: the HPV vaccine prevents most infections from occurring at all, while screening catches the small number of persistent infections that occur regardless. Someone who has been vaccinated still needs to follow the same screening schedule, since the vaccine does not cover every cancer-causing HPV strain.
6. Haemoglobin and ferritin
- Typical age to start: 30, for people who menstruate
- How frequently should you do this: Annually, or as guided by symptoms
- What it can pick up before symptoms: Iron deficiency with or without anaemia
- Risk factors that move the start earlier: Heavy periods, pregnancy, vegetarian diet, gut disease
Haemoglobin carries oxygen in red blood cells; ferritin reflects how much iron is stored. Iron deficiency depletes stores first. Ferritin often falls years before haemoglobin does, so a person can be iron deficient long before standard testing shows anaemia.
That matters in India, where anaemia, measured by haemoglobin alone, already affects 57% of non-pregnant women aged 15 to 49, per the National Family Health Survey (2019 to 2021), up from 53% in 2015 to 2016. The true scale of iron deficiency is likely higher still.
Heavy periods, pregnancy, a vegetarian diet or a gut condition affecting absorption are all reasons to test earlier or more often than the standard starting age.
7. Kidney filtration rate with urine albumin
- Typical age to start: 40
- How frequently should you do this: Annually if diabetic or hypertensive; otherwise periodically
- What it can pick up before symptoms: Kidney filtration loss and protein leak
- Risk factors that move the start earlier: Diabetes, hypertension, family history of kidney disease.
Kidney screening fails when only creatinine is measured, since creatinine can remain within a normal range even after a person has already lost a meaningful share of kidney function.
The 2024 Kidney Disease: Improving Global Outcomes guideline is explicit that chronic kidney disease is assessed with two measurements:
- Estimated glomerular filtration rate: Describes how fast the kidneys filter
Healthy kidneys can compensate for early damage by working harder, so this number often stays in a normal range until a substantial share of kidney function is already gone.
- Urine albumin-to-creatinine ratio: Detects protein leaking into urine.
Protein typically shows up in the urine before the filtration rate drops, so the albumin test can catch kidney damage while the filtration rate still looks acceptable.
Anyone with diabetes or hypertension has a strong case for testing both annually, since the urine test is a simple, low-cost addition to a standard blood draw.
8. Liver fat assessment
- Typical age to start: 40
- How frequently should you do this: Periodically, guided by risk factors
- What it can pick up before symptoms: Fat accumulation and early scarring in the liver
- Risk factors that move the start earlier: Prediabetes, high triglycerides, high waist at normal weight
Fat accumulating in the liver is common and produces no symptoms until damage is advanced. A 2022 systematic review and meta-analysis in the Journal of Clinical and Experimental Hepatology pooled Indian studies and estimated fatty liver in close to four in ten adults, including many at a normal body weight, contrary to the assumption that it only affects people who are overweight.
Because fatty liver produces no symptoms, finding it usually depends on a calculated risk score or an imaging test, rather than how a person feels.
FIB-4, or Fibrosis-4 index, is a score that estimates the likelihood of liver scarring using numbers most people already have on file: age, two liver enzymes called AST and ALT, and platelet count.
An ultrasound, by contrast, sees the fat itself rather than estimating scarring risk. However, neither is a diagnosis on its own, and both need clinical interpretation.
9. Clinical breast examination
- Typical age to start: 40
- How frequently should you do this: Every two years
- What it can pick up before symptoms: Palpable breast lumps
- Risk factors that move the start earlier: Family history of breast cancer
A large Indian trial tested whether a simple physical breast exam, done by a trained health worker rather than a doctor, could catch cancer earlier. Professor Indraneel Mittra and colleagues ran the trial in Mumbai, following around 150,000 women for 20 years, with exams every two years. Women in the exam group were diagnosed at an earlier, more treatable stage than women who weren’t examined.
Overall, there was 15% reduction of breast cancer deaths in the exam group, but the trial wasn’t large enough to be fully confident this wasn’t due to chance. In women aged 50 and older, the drop was larger, about 30%, and this result was strong enough to be considered real rather than a fluke. The finding is real but limited: this method clearly helps older women, and the evidence for younger women remains less certain.
10. Oral examination
- Typical age to start: 40
- How frequently should you do this: Annually for tobacco or areca nut users
- What it can pick up before symptoms: Pre-cancerous oral lesions
- Risk factors that move the start earlier: Tobacco or areca nut use
Oral cancer is closely linked to tobacco use, in smoked or chewed form, and alcohol consumption. India’s high rates of tobacco and areca nut chewing make this a meaningful risk in a population where oral cancer is already among the more common cancers.
The Trivandrum oral cancer screening trial, run in Kerala from 1996, tested a simple visual mouth exam performed by a trained health worker, not a doctor. Over a 15-year follow-up, oral cancer deaths fell by 34% among tobacco or alcohol users, the group the trial defined as high risk, compared with those who received routine care. No meaningful reduction was seen in people without these habits, since their baseline risk was already low.
The exam itself takes only a few minutes and requires no equipment beyond a light and a trained eye, checking for white or red patches, ulcers that do not heal and other early changes years before they would otherwise be noticed.
11. Colorectal screening
- Typical age to start: 45 to 50
- How frequently should you do this: Annually (stool test) or every 10 years (colonoscopy)
- What it can pick up before symptoms: Bleeding polyps and early tumours
- Risk factors that move the start earlier: Family history, inflammatory bowel disease
Colorectal cancer grows slowly from polyps that bleed intermittently long before they cause pain or a change in bowel habit. It is recommended starting screening at 45, using either an annual faecal immunochemical test, which detects hidden blood, or colonoscopy every 10 years.
That recommendation is built on American data, where colorectal cancer is more common than in India. This does not mean Indian adults can skip screening. It means the case for starting at 45 by default is weaker here than in the US, and the decision leans more heavily on personal risk. Family history of colorectal cancer, or a condition such as inflammatory bowel disease, is a direct genetic or inflammatory pathway to earlier tumours, and moves the starting age earlier regardless of population-level incidence.
12. Bone density (DEXA scan)
- Typical age to start: Postmenopausal, or 45 to 50 as a baseline
- How frequently should you do this: Periodically, guided by risk and prior results
- What it can pick up before symptoms: Bone loss and fracture risk before a first fracture happens
- Risk factors that move the start earlier: Long-term corticosteroid use, a previous low-trauma fracture, early menopause
Bone loss produces no symptom until something breaks, and the first fracture is often the diagnosis. A dual-energy X-ray absorptiometry (DXA) scan measures bone mineral density at the hip and spine, and fracture risk calculators now include an India-specific model, which matters because Western normative data can misestimate risk in Indian populations.
Oestrogen decline after menopause accelerates loss, so the postmenopausal years are the standard starting point. Long-term corticosteroid use, a previous low-trauma fracture or an early menopause all move it forward.
13. Hearing and vision function
- Typical age to start: 45 to 50
- How frequently should you do this: Periodically from 45 to 50
- What it can pick up before symptoms: Correctable hearing and vision loss linked to dementia risk and falls
- Risk factors that move the start earlier: Occupational noise exposure, diabetes, family history of eye disease
These two are usually treated as comfort issues, which is why they get skipped. The 2024 update of The Lancet Commission on dementia prevention lists hearing loss and untreated vision loss among the modifiable risk factors associated with dementia across the life course, alongside falls and social withdrawal that follow from both.
Uncorrected refractive error and cataract remain leading causes of visual impairment in India, and both are correctable. Screening here protects independence and the ability to stay in a conversation, which is what healthspan actually looks like day to day.
FOXO Primer: Reading Age, History and Results as One System
Decade grouping is a scheduling device, and for a few markers age genuinely changes what a result means too: bone density is read against a different reference range before and after menopause, and some hormone levels that are normal before puberty would be abnormal after it. But for most of the screenings above, decade grouping only answers when to begin.
What a result means depends on the rest of the picture: a father who had a heart attack at 48, a South Asian pattern of fat stored around the organs at a modest body weight, a pregnancy complicated by raised blood pressure, years of areca nut use, a polycystic ovary syndrome diagnosis at 24, a previous ferritin that was low.
Read alone, each screening gives a number and a threshold. Read together, they behave like connected systems, which is what systems biology means in practice: how the body regulates fuel, how blood moves through vessels, how the kidneys filter, how the liver stores.
A slightly raised HbA1c, a triglyceride level near the top of range, an ultrasound mentioning grade 1 fatty liver and a urine albumin that nobody commented on are four unremarkable findings and one coherent pattern. No individual report will say so, because no individual report is looking.
That is the gap FOXO is built around: the distance between a set of results and a decision about what to do first. Results are read as a pattern across connected systems rather than as a row of isolated markers.
Primer runs one complete cycle of that work: a detailed medical and symptom history, 154 blood and urine markers and more than 70 metabolomics markers. The interpretation becomes a prioritised playbook reviewed by a FOXO Doctor, with a consultation to talk through what it means for you. Joining the waitlist is the way in.
The number on a report is not really the question. What matters is what changed since the last reading, and what gets done about it before the next one.
FAQs
How often should preventive screenings be repeated if everything came back normal?
It depends on the test and your risk profile, not on a single annual habit. Blood pressure and HbA1c benefit from yearly checks in most adults over 30, a lipid panel every three to five years when stable, and lipoprotein(a) only once in a lifetime.
HPV-based cervical screening is repeated every five to 10 years after a negative result under the World Health Organization’s 2021 guidance. Anyone with diabetes, hypertension or a strong family history will generally need shorter intervals, decided with a doctor.
Can early detection health screening in India be done through government programmes?
Yes, in part. India’s National Programme for Prevention and Control of Non-Communicable Diseases offers population-based screening for hypertension, diabetes, and oral, breast and cervical cancers at Health and Wellness Centres, generally from age 30. Coverage and test availability differ a great deal between states and districts, and specialised tests such as lipoprotein(a), urine albumin or DXA usually require private laboratories.
What is the difference between a screening test and a diagnostic test?
A screening test is offered to people without symptoms to identify who needs closer investigation. A diagnostic test establishes what is actually happening in someone with symptoms or an abnormal screening result.
Screening tests are chosen to be cheap and safe enough to offer widely, which means they trade precision for reach and produce some false positives by design. An abnormal screening result is a prompt for a doctor’s assessment, never a diagnosis.
Should men have any screening equivalent to cervical or breast screening?
There is no male equivalent with the same strength of evidence at younger ages. Prostate-specific antigen testing remains contested because of overdiagnosis, and most guidelines suggest discussing harms and benefits rather than routine testing. For Indian men, the higher-yield checks are blood pressure, HbA1c, lipids, liver fat and, for tobacco or areca nut users, a visual oral examination.
Do wearables and continuous glucose monitors replace any of these screenings?
No. Wearables track patterns over time, such as resting heart rate, sleep timing or glucose response to meals, which laboratory tests cannot see. They do not detect albumin in urine, high-risk HPV infection, low bone density or a colonic polyp. The two kinds of information answer different questions and work best when interpreted alongside each other.
