Black seed oil for immunity in fall?

Don't count on some oil automatically boosting your immune system in autumn. That's just not how our body works. Black seed oil has shown some anti-inflammatory effects in studies, but "strengthening the immune system" is one of those buzzwords that's everywhere and isn't really scientifically grounded. If you want to take it, it won't hurt - it's pretty much neutral - but it's not a miracle cure.

What actually helps in autumn: getting enough sleep, regular exercise (even if it's just walks), enough vitamin D since there's less sun, and just paying attention to eating a balanced diet. It's unglamorous, but it works. If you still want to try black seed oil, look for good quality and proper dosage - a lot of cheap products are just watered down or barely have any active ingredients in them.

Otherwise: if you're constantly getting colds in autumn and winter, I'd rather talk to a doctor about it. Sometimes it's just normal seasonality, some people are just more prone to it then. Alcohol, stress, and not drinking enough water - that definitely does more harm than black seed oil helps.