Healthcare Intermittent fasting may lead to longer, healthier life Updated : November 17, 2019 05:58 PM IST Patients who practice intermittent fasting are less likely to be diagnosed with heart failure. It takes about 12 hours of fasting for the effects to be activated. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.