Older adults and fasting: potential benefits, real-world risks, and safety signals
Latest news on WhatsApp أجدد الأخبار على واتسابThe most common practical risk is dehydration and related dizziness, fatigue, and reduced concentration, particularly when fasting hours are long or the weather is warm. Nutrition guidance notes that mild dehydration can happen during fasting, but urgent action is needed if dizziness prevents standing or if a person becomes disoriented.
Older physiology can also be less resilient to metabolic stress. A medical review highlights age-related changes such as reduced muscle mass, impaired adaptation to metabolic disturbances, and balance and attention impacts during fasting periods, which can increase fall risk and, in some cases, affect renal function, especially with multiple comorbidities.
Medication and chronic illness are the decision-makers
Health services guidance is consistent on one point: if someone plans to fast while living with chronic illness or taking regular medication, they should seek healthcare advice first, because medication timing and hydration shifts can change risk profiles.
For diabetes specifically, international practice increasingly relies on individualized risk stratification (low, moderate, high) based on treatment type, glycemic control, and comorbidities, rather than using age alone as the deciding rule.
Clear “stop fasting” signals
For older adults with diabetes, safety toolkits advise breaking the fast at defined thresholds (for example, blood glucose at or below 3.3 mmol/L during fasting, very high readings above 16.7 mmol/L, or any signs of dehydration, confusion, fainting).
For older adults without diabetes, severe dizziness, confusion, fainting, or obvious dehydration are strong red flags to stop fasting and rehydrate promptly.
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Tahani Elghazaly5252 Posts
