Speak for yourself, the nutrient rich food and especially the variety I eat each day was not available in the middle ages. Remember that people in the those times where much shorter (as proved by the shorter beds), this is the result of malnutrion.
Toxicity is likely to be higher then, open or no sewage systems, very low hygiene (people didn't bathe, lots of animals) and remember they used woodstoves in side the house!
sewage systems are necessary for sanitation in cities. Most people were living in the country side. "hygiene" is largely a social aspect that doesn't effect health much. Some researchers claim people did not lose height in the Middle Ages at all. Variety of food is not that important- we just need to get all the required nutrients in the foods we eat. Great to hear you are able to go against the modern trends and eat nutrient rich food.
Toxicity is likely to be higher then, open or no sewage systems, very low hygiene (people didn't bathe, lots of animals) and remember they used woodstoves in side the house!