Making an appearance on the dais just a little before noon, the 74-year-old Gandhian raised slogans of 'Bharat Mata ki Jai' thrice and waved towards the crowd to assure them that he was alright.
"Doctors have examined me personally. There is nothing to worry. I have lost six and half kg. By God's grace and also the energy I receive from you, there is no difficulty.
"Now I have faith which i will not die till the Lok Pal Bill is passed, " he told cheering supporters gathered at Ramlila Maidan where he's sitting on an indefinite fast demanding a strong Lok Pal.
Earlier within the day, doctors said they were concerned about the health of Hazare because his fast entered the 10th day.
"We have examined him this early morning. There is stability in his blood pressure and heart beat. He has had rest. He had six litres of water and the ketone levels came down, " Dr Naresh Trehan told reporters here.
Trehan said it was a "matter of concern" that for that past 10 days, Hazare was on fast and that he has not really eaten anything.
"This will have an effect on his body. Till right now, he has already managed for 10 days and he is stable. We're monitoring his health round-the-clock, " he said.