But if Russians start living exactly like people in Western Europe, then you will soon have allergies too!
I think that before late 80s allergy was a non-known word. But then there was a large campaign in the press about allergies. Sometimes it was claimed that allergies are behind virtually all dishealth.
The campaigns though lacked any details: they did not mention specific allergies, rather they claimed that allergies may be for anything. I think attributing anything to allergies became rather popular in those times. But the main reasons for allergies usually were named air polluted with exhaustion gases, pollen, domestic dust, domestic animals, pillow fluff, cockroaches, synthetic food. So the stereotype is that healthy natural food cannot lead to allergies.

And cost about 5% of the cost of soy milk in Western Europe. Good product.
I think that any soy products are regarded non-healthy in Russia. Many think about them as about cheaper "ersatz" substitutes for normal products, invented in the USA to feed the poor negros. They are usually much cheaper, otherwise nobody would buy them. Also soy products very often include genetically-modified soy, and many people fear such products.