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Potential contraindications and common adverse effects of fasting.
| Potential Contraindications | Common Adverse Effects |
|---|---|
| People of low body weight | Fatigue |
| Breastfeeding or pregnant women | Insomnia |
| Extremes of age (children, the very old) | Nausea |
| People at high risk of malnutrition | Headache |
| Viral infections | Presyncope |
| Type 1 diabetes | Dyspepsia |
| Renal stones | Back pain |
| Gout | Pain in extremity |
