A spokesman for the Israeli Prisons Service said 10 fasting Palestinians were evacuated for medical treatment on Sunday, with two remaining hospitalised. According to the spokesman, 850 Palestinian security prisoners were currently on hunger strike.
Palestinian officials say some 1,500 prisoners are participating in the hunger strike that began on 17 April, with detainees ingesting only water and salt.
Israeli authorities have put the number at around 1,200.
Some 6,500 Palestinians are currently imprisoned by Israel for a range of offences and alleged crimes.
Around 500 are being held under Israel's system of administrative detention, which allows for imprisonment without charge.
Palestinian prisoners have mounted repeated hunger strikes, but rarely on such a scale.
The hunger strike is being led by Palestinian leader and prominent prisoner Marwan Barghouti, serving five life sentences over his role in the second Palestinian intifada, or uprising, of 2000 to 2005.
The prisoners have issued demands ranging from better medical care to phone access.