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4 min readWhy the same diet transforms your friend and does nothing for youThe same diet works differently because variants in genes like FTO, TCF7L2 and MC4R shape your appetite, how you store fat and how your body handles carbs, so two people eating identically can see very different fat loss and hunger results.
Reviewed· 3 sources· 3 genes
5 min readIs my afternoon energy crash actually fixable?Yes, the afternoon crash is often fixable: it can stem from blood-sugar swings after carb-heavy lunches, low iron tied to genes like TMPRSS6, B-vitamin handling via MTHFR, and your natural body clock set by PER3, all of which respond to food, iron status and timing.
Reviewed· 3 sources· 3 genes
3 min readWhy does coffee keep you up but not your partner?Coffee keeps you up but not your partner mainly because of the CYP1A2 gene, which sets how fast your liver clears caffeine, plus ADORA2A, which tunes caffeine's effect on your brain, so slow metabolisers feel it for far longer.
Reviewed· 3 sources· 2 genes
4 min readWhy does alcohol hit me harder than my friends?Alcohol hits you harder mainly because of variants in the ALDH2 and ADH1B genes, common in East and South Asians, which slow the breakdown of acetaldehyde, a toxic by-product, causing facial flushing, fast heartbeat, nausea and stronger effects from less alcohol.
Reviewed· 3 sources· 2 genes
Food & gut
How your body treats food
7 min readIs PCOS genetic, and what do your genes actually say about your hormones?If PCOS runs in your family, or if you have spent years managing symptoms without ever fully understanding where they come from, the genetics of this condition is one of the most practically useful things you can understand about your own body. PCOS is the most common hormonal condition in women of reproductive age, affecting somewhere between 10 and 20 percent of women globally. It is also one of the most genetically complex, which is both why it is hard to diagnose and why no two women's experience of it is quite the same. The genes are real, the interaction with lifestyle is real, and both matter in ways that change how you manage this condition day to day.
Reviewed· 3 sources· 4 genes
6 min readWhy do the bacteria in your gut decide so much about your health, and how much of it is genetic?There are trillions of bacteria living in your gut right now, and they are not just passengers. They are closer to a hidden organ, one that influences your digestion, your immune system, your weight, your mood, and even how you respond to food and medicine. This community is called your gut microbiome, and in recent years it has become one of the most exciting and most overhyped topics in all of health. The truth sits somewhere in between the breathless headlines and the dismissive eye-rolls, and the genetics angle is more interesting than most coverage admits.
Reviewed· 3 sources· 2 genes
5 min readWhy do some people turn into a different person when they're hungry?Getting 'hangry', that sharp slide into irritability when a meal runs late, is not a character flaw or a lack of willpower. It is real biology, and part of how intensely you feel it is shaped by your genes: when you have not eaten, your blood sugar drops, your glucose-hungry brain starts rationing, and stress hormones flood in, with variants in blood-sugar genes like TCF7L2 and mood-chemistry genes like SLC6A4 making some people feel that drop harder and faster than others.
Reviewed· 3 sources· 2 genes
5 min readWhy do mosquitoes feast on you and ignore your friend?Mosquitoes bite you more than your friend because your body advertises itself differently, and a surprisingly large part of that advertising is genetic: twin studies suggest your attractiveness to mosquitoes is roughly 60 to 80% heritable, shaped by the carbon dioxide you exhale, the chemistry of your skin and your body heat, so it was never about your 'sweet blood'.
Reviewed· 3 sources· 3 genes
5 min readWhy does dal-chawal spike my blood sugar but not my sister's?Dal-chawal can spike your blood sugar but not your sister's because of differences in the AMY1 gene that sets how much starch-digesting enzyme you make, plus TCF7L2 and FTO variants that shape insulin response, so the same rice raises glucose more sharply in some people.
Reviewed· 3 sources· 3 genes
3 min readWhy does milk bloat me when everyone says it is healthy?Milk bloats you because of lactose intolerance, set by the MCM6 region that controls the LCT gene: in most South Asian adults this gene switches off after childhood, so you make less lactase and undigested milk sugar ferments in the gut, causing gas and bloating.
Reviewed· 3 sources· 2 genes
4 min readDo I actually need all these supplements?Most people do not need a cabinet of supplements, but genes like MTHFR (folate and B12 processing), VDR (vitamin D response) and FUT2 (B12 absorption) plus the Indian context of widespread vitamin D and B12 deficiency mean targeted supplements, guided by a blood test, often beat broad multivitamins.
Reviewed· 3 sources· 3 genes
5 min readWhy is my cholesterol high even though I eat well?High cholesterol despite a good diet is often genetic: inherited variants in LDLR, APOB or PCSK9 cause familial hypercholesterolemia, and the APOE e4 variant raises cholesterol response, so your liver handles cholesterol differently regardless of how carefully you eat.
Reviewed· 3 sources· 3 genes
For the gym crowd
Train with your wiring
4 min readWhy does my friend build muscle faster on the same workout?Your friend may build muscle faster because of genes like ACTN3, which favours fast-twitch power fibres, ACE, linked to strength versus endurance, and PPARGC1A, which shapes how muscles respond to training, so identical workouts produce different gains across people.
Reviewed· 3 sources· 3 genes
4 min readWhy do I keep getting injured when I run?Recurring running injuries can be partly genetic: variants in collagen genes like COL1A1 and COL5A1, plus GDF5, affect the strength and elasticity of your tendons, ligaments and joints, making some people more prone to strains, sprains and tendon problems.
Reviewed· 3 sources· 3 genes
3 min readWhy am I exhausted after workouts that energise everyone else?You may be wiped out after workouts that energise others because of genes like COMT, which affects stress-hormone and dopamine clearance, IL6, tied to inflammation and recovery, and ACTN3, which shapes muscle fibre type, so the same session taxes your body and recovery differently.
Reviewed· 3 sources· 3 genes
4 min readWhy do South Asians carry more belly fat at a lower weight?South Asians tend to carry more belly fat at a lower weight because of the thin-fat phenotype: a genetic and developmental tendency to store fat around the organs (visceral fat) rather than under the skin, raising diabetes and heart risk even at a normal BMI.
Reviewed· 3 sources· 1 genes
Sleep & the mind
Body clock & stress
4 min readAm I lazy for needing nine hours, or is that real?Needing nine hours is usually real, not laziness: genes like PER3, CRY1 and CLOCK shape your sleep need and natural body clock, so some people are genuinely long sleepers or night types who require more sleep to function well.
Reviewed· 3 sources· 3 genes
3 min readWhy does a stressful week flatten me when my colleague bounces back?Stress flattens you more than your colleague partly because of genes like COMT, which sets how fast you clear stress chemicals, and FKBP5, which tunes your cortisol stress response, so some people recover from pressure more slowly even under the same load.
Reviewed· 3 sources· 2 genes
4 min readWhy does caffeine make me anxious even in tiny amounts?Caffeine can make you anxious in tiny amounts mainly because of the ADORA2A gene, which makes some brains highly sensitive to caffeine's effect on adenosine receptors, often combined with CYP1A2 slow metabolism that keeps caffeine in your system longer.
Reviewed· 3 sources· 2 genes
4 min readWhy do I crave sugar when I am stressed or sleep-deprived?You crave sugar when stressed or sleep-deprived because cortisol from stress and a hormone shift from poor sleep, raising hunger-signalling ghrelin and lowering fullness-signalling leptin, push you toward quick energy, with FTO gene variants making some people crave more strongly.
Reviewed· 3 sources· 3 genes
Family & kids
Patterns at home
5 min readMy whole family is always tired. Is that just us, or is it genetic?Family-wide tiredness can be partly genetic and partly shared environment: inherited tendencies in genes like MTHFR (B-vitamin processing) and TMPRSS6 (iron regulation), combined with common Indian vegetarian diets low in iron and B12, often leave whole families running on empty.
Reviewed· 3 sources· 2 genes
4 min readWhat is the one health conversation I should have with my parents?The one health conversation to have with your parents is a clear family medical history: ask which conditions, like diabetes, heart disease, cancers, thalassemia or early deaths, affected close relatives and at what age, because this family history is one of the strongest, cheapest predictors of your own risk.
Reviewed· 3 sources· 1 genes
4 min read
Should I worry about diabetes if it runs on one side of my family?Yes, diabetes on one side of your family raises your risk but does not guarantee it: genes like TCF7L2, FTO and KCNJ11 plus shared diet and lifestyle increase odds, and South Asians develop type 2 diabetes earlier and at lower weights, so earlier screening and prevention are worthwhile.
Reviewed· 3 sources· 3 genes
5 min readShould couples get thalassemia screening before marriage?Yes, couples in India should consider thalassemia screening before marriage: beta-thalassemia is caused by HBB gene variants and roughly 1 in 25 Indians is a silent carrier, so if both partners are carriers there is a 1-in-4 chance each pregnancy of a seriously affected child.
Reviewed· 3 sources· 1 genes
Start from the beginning
Genetics 101
6 min readCan Your Genetic Risk Change Over Time? Understanding What Changes and What Doesn'tYour genetic risk for a disease can change over time even though your DNA sequence stays the same for life. This happens because risk scores are calculated using external factors - new scientific research, updated statistical models, your age, and your lifestyle - not because your genes themselves mutate. Genetic testing companies periodically recalculate risk as science improves, which is why a report you received five years ago may look different today.
Reviewed· 2 sources· 3 genes
6 min readGenetic Health Screening vs Regular Health Checkup: Which One Should You Choose in 2026?A regular health checkup tells you what is happening in your body today. A genetic health screening tells you what your body is predisposed to develop in the future. Both serve different but complementary purposes. For Indians with lifestyle disease risk or family history, the two together offer the most complete preventive health picture available in 2026.
Reviewed· 3 sources· 5 genes
7 min read
Which Preventive Health Tests Should You Take Based on Your Genetic Risk?Most Indians take a blood test when something feels wrong. A smaller number take an annual checkup to catch what is currently developing. Almost nobody yet takes a test designed to reveal what their body is silently set up to develop over the next 20 years. This is the gap that genetic risk-based preventive testing fills. In 2026, as genetic testing becomes more accessible and India-specific genomic data improves, it is becoming possible to build a personalised preventive testing plan built entirely around your specific biological risk profile rather than generic age-and-gender population averages.
Reviewed· 3 sources· 6 genes
3 min readWhat is a gene, in plain language?A gene is a short stretch of your DNA that acts as an instruction, usually a recipe for making one protein, the tiny machines that build and run your body; you inherit about 20,000 genes, one copy from each parent, and small differences between people explain much of human variation.
Reviewed· 3 sources· 1 genes
4 min read
Does a DNA test tell me my future?No, a DNA test does not tell your future: for most common conditions it gives probabilities and risk nudges, not certainties, because traits like diabetes and heart disease arise from many genes interacting with diet, lifestyle and environment, so your results are tendencies you can often influence.
Reviewed· 3 sources· 1 genes
3 min readCan my genes change during my life?Your underlying DNA sequence stays essentially the same for life, but how your genes are switched on or off can change through epigenetics, influenced by diet, stress, sleep, exercise and environment, so gene activity, not the genes themselves, shifts over time.
Reviewed· 3 sources· 1 genes
4 min readHow accurate are at-home DNA tests?At-home DNA tests are usually accurate at reading the genetic letters they test (genotyping), but much less reliable at interpreting what results mean for health, and accuracy is lower for South Asians because reference databases are dominated by European data.
Reviewed· 3 sources· 1 genes