Anna Hazare, who was admitted in a hospital in Gurgaon after he ended his 12-day fast for a strong Lokpal Bill, is stable and moving towards normalcy, doctors said on Monday.

"Nobody knows when he will be discharged. His condition is stable. He has to be monitored. Usually, it takes 2-3 days. When his parameters are established and his body starts tolerating and digesting food, only then he can go," chairman of Medanta Medicity, Dr Naresh Trehan, who was monitoring Hazare's health during his fast, said.

The 74-year-old activist was brought to the hospital on Sunday after he called off his hunger strike.

Hazare wants to take rest and has declined requests to meet him because he is "still very weak", Trehan said, adding various tests have established that the activist's liver and kidneys were normal.

"His condition has improved 30 per cent between yesterday and today. He has not started eating properly but progress is satisfactory," Trehan told reporters.

The doctor said it is important that they increase his diet gradually. "His blood pressure is 130/84 and heart rate is below 80 and this is good progress. (It is) in the right direction," he said.

"The tests show that blood ketones and urine ketones have decreased," he said, adding his weight has also stabilised.

"It was falling 500 grams (per day) during the fast but it fell only 200 grams yesterday, which is also an indicator that his recovery is on the right path" he said.

"When he was brought to the hospital, he was very exhausted. He has slept and has taken a lot of rest since yesterday. He was given juice last evening, and this morning given vegetable soup. Initially, he will be given light fruits and subsequently solid diet," Trehan added.