I am Igor Yakymenko, biologists, biophysicist, and environmental risk researcher. This blog is about some tricky scientific issues related to our health. Being PhD in human physiology and PhD in biophysics, I’ve been often surprised reading or listening to comments of some experts on health risk issues in terms of “absence of any evidence”, “great scientific uncertainty” and so on, while I know exactly the strict scientific evidence on that issues exists. So here I try to post relevant information into clear scientifically correct way on such kind of tricky issues.