Who Should Not Fast
Fasting is not right for everyone, and that is important to know. If you are pregnant or breastfeeding, your body needs steady food, so please do not fast. If you are a teenager still growing, skip fasting too. Most importantly, if you have diabetes, low blood sugar, high or low blood pressure, or you take medicine that must be swallowed with food, do not start fasting on your own. Some medicines can push your sugar dangerously low if you skip meals. This is not something to guess about. Talk to your doctor or clinic first and let them guide you. There is no shame in this. Keto without fasting still works very well, so you lose nothing by eating normal meals and simply choosing eggs, greens, and fish over ugali and sugar. Your health comes first, always. Fasting is a tool, not a rule, and it is fine to leave it aside.
Takeaway. If you are pregnant, growing, or on medicine, check with a doctor before fasting, because health comes first.
Sources
- Intermittent fasting strategies and their effects on body weight and cardiometabolic risk factors: systematic review and network meta-analysis (BMJ, 2025)
- Diet Review: Intermittent Fasting for Weight Loss, including who should avoid it. Harvard T.H. Chan School of Public Health
- Effects of Intermittent Fasting on Health, Aging, and Disease (New England Journal of Medicine)
General information, not medical advice. Always consult a qualified health professional before changing how you eat, especially if you are pregnant, breastfeeding, diabetic or taking medication.