Is polysorbate 80 very toxic?

Not likely. Polysorbate 80 is used in a variety of foods (ice cream, for example) and cosmetic products. There is a theoretic risk for developing increased blood clots - but it is used as food additive both in europe and usa - the details of this product is http://www.Chservice.Ru/download/crills%20and%20crillets.Pdf.