Lately I've been catching colds all the time, even though I used to be healthy. My friends say it's an immune system problem. Is there any way to strengthen it or does it all depend on your genes?
They already said the right things about lifestyle above. I'll just add from my own experience - when I go ice fishing in winter on Lake Baikal, there's cold and humidity, but I rarely get sick because I sleep normally and have no stress. What actually helps most: regular walks (especially in the cold), proper sleep for 7-8 hours, and avoiding sudden spikes in activity. Food-wise - nothing supernatural, just don't overdo sweets and eat more vegetables. If you get sick often without obvious reasons, it makes sense to get tested for vitamin D and iron - that's often the culprit.
Your immune system works like a protective shield - white blood cells and antibodies destroy viruses and bacteria, but things go wrong because of stress, lack of sleep, poor nutrition, and seasonal factors (we get sick 40% more often in winter). Genetics plays a role, but it's not a death sentence - I've noticed myself that when I sleep properly, eat fish with omega-3s, and avoid stress, I hardly ever catch a cold. Try sleeping 7-8 hours a night for at least a month, add vitamin D (especially relevant in winter when you're spending a lot of time indoors), vitamin C, and cold showers - often helps better than expensive supplements.
The folks above already described shields and white blood cells correctly, but I want to add something from my own experience 😊 When I switched to farming and started spending more time at my dacha, I noticed I caught colds way less often. The thing is, immunity isn't just a shield, it's a living system that needs constant "training". When you're sitting at home, your body doesn't encounter different strains, but when you go out to the garden, to the fields - you're constantly in contact with microbes and viruses, and your immune system gets stronger. Plus fresh air, physical activity, quality sleep - these aren't separate factors, they're one whole package.
About genes - yeah, genetics plays a role, but it's not the deciding factor. The fact that you used to be healthy and now you're sick all the time probably means your routine got messed up. Check if you're getting enough sleep (I need at least 7-8 hours for normal immunity), drink enough water, don't sit constantly in a stuffy room. If you live in the city, try to get out to nature more often. And vitamins matter - in fall and winter in 2026 I always take vitamin D, it really helps 💪
If nothing changes despite all the lifestyle changes, then you should get blood work done at a doctor's - there could be some hidden inflammatory process or a serious deficiency of something.
People above already correctly mentioned the basics - leukocytes, antibodies, all that stuff. But here's what I've noticed over the past couple years: immunity isn't just genetics, it's more about your lifestyle. When I started taking my daily routine more seriously, because carpentry orders require focus, I stopped catching colds as much. I used to sleep five or six hours back when I was 25, now I try to get seven or eight - the difference is noticeable. And yeah, stress eats away at your immunity like rust eats wood. Recently there were two months of chaos with roofing work - I was sick almost constantly. Then it leveled out.
What actually helps isn't some magic cure, it's just predictable things. Decent food, no fast food at night. Movement - I'd go to the forest to pick mushrooms even in summer when I was lazy, and I noticed that on the days I was in fresh air, my body felt different. Maybe it's placebo, maybe it's not, but the fact remains. Vitamins like C don't really save you, to be honest, it's mostly peace of mind. But hardening yourself - gradual, not like some crazy person jumping in an ice hole - that actually helps your body get used to temperature swings.
If you're getting sick a lot in 2026, first thing - look at your routine. You can get an immunogram from a doctor if you really suspect serious issues, but usually it's just because your body's stressed and sleep-deprived. Genetics does play a role, yeah, but it's not a death sentence. Even me, a grumpy carpenter who's lazy in the mornings, managed to improve things just by structuring my day.
I agree with what was written above about stress and sleep deprivation - these really are the main enemies of immunity, I went through it myself. But I want to add a practical point: when I started traveling a lot by car across different regions, I noticed that frequent climate changes and long hours on the road immediately take a toll on your body's defenses. Try to analyze what changed in your life over the last six months to a year - maybe you're spending more time in air-conditioned rooms, started dealing with more stress, or your sleep schedule changed. Genetics of course plays a role, but in 2026 it's already proven that lifestyle has way more of an impact - so really ask your doctor to check your vitamin D and B12 levels, that often turns out to be the bottleneck.
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