An equivalent dose unit, which refers to the amount of energy from ionizing radiation absorbed by the human body. Different types of radiation have different effects on living tissue; for example, alpha radiation has a higher ionising potential and may therefore be more harmful. 1 gray of alpha radiation is equivalent to 20 sieverts, while 1 gray of beta radiation is equivalent to 1 sievert. The sievert is a very high unit and is more commonly used with the prefixes mili and micro. For example, by eating one banana, a person receives an equivalent dose of 0.0001 mSv.