I know vitamin e is one of the vitamins dangerous in high quantities. i currently take some supplements (food based vitamin + probiotic) with 42 iu total (140% rda); is this a safe level?

Bleeding risk: The most significant risk is hemorrhage with high dose Vitamin E. Bleeding is uncommon however unless the dose is > 1000 mg/day (unless the patient is taking taking oral coumarin or warfarin). So to answer your question..140% RDA should be safe. The upper limit for adults aged ≥ 19 yr is 1000 mg for any form of α-tocopherol.

Yes: The fat soluble vitamins A D E and K can be unsafe in high doses. To much vitamin E can cause bleeding problems, Management of vitamin E toxicity consists of discontinuing vitamin E supplements and monitoring the PT if bleeding complications develop.