Well, my doctor said I have to avoid food rich in estrogen (phytoestrogen) like soy, etc.
It is because I take contraception. My doctor said me that when I eat any of these, the risk of a blood clot is higher.
And now I really don't know what to do.. what to eat..
Oh. shoot.
On one hand I really hate to contradict a doctor.
However I think you may have misunderstood him -or perhaps he is misinformed himself. most doctors are pretty much unqualified to give nutritional advice.
First off. are there any preexisting conditions that may have led him to say this. Have you had blood clots in the past? are you taking any other medications? have you had other hormonal imbalances? And thyroid issues?
If the answer to any of those is yes, you should ask your doctor for a referral to a registered dietician. I don't know what kind of system you have in the Czech Republic but you may not even have to pay for it. Even if you did have to pay for it - it will be like only one or two phone interviews or zoom meetings.
did you happen to mention being vegan to your doctor?
Also despite all the advice I'm willing to give about nutrition to people, I am well aware of taking the advice of random people on the internet is not an advisable strategy. So maybe check out a dietician just for your own peace of mind.
And a word of caution. Not sure how it works in Czech but in English speaking countries there is some confusion between "dietician" and "nutritionists". the words are somewhat interchangeable but a dietician is liscenced and receives Post Graduate level training - just like a nurse. Over here anyone can call themselves a nutritionist.
One more thing. there is some concern with people over doing soy. Maybe someone else on VF and can check or correct me on this but I'm under the impression that 2 - 4 servings of soy is a good goal. That would be about 25 - 50 grams of soy protein a day.
There are people who are sensitive or even allergic to soy. And some of these are vegans. You can meet all your nutritional goals without soy. but I wouldn't try unless you had a good reason.