Is Intermittent Fasting Safe for People with Chronic Illness?

Intermittent fasting has become one of the most widely discussed dietary patterns for weight management and metabolic health. The common practice is characterised by the 16:8 schedule or alternate-day fasting. However, healthcare professionals caution that it might not be effective for everyone, particularly for people with long-term health conditions. For people managing long-term illnesses, the timing of their meals can influence the timing of their medications, glucose, and metabolic patterns.

In an exclusive interaction with the editorial team of Onlymyhealth, Dr Arunadevi Jagadish, Dietician - Aster CMI Hospital, Bangalore, explained that intermittent fasting (IF) refers to an eating pattern that cycles between periods of eating and fasting rather than focusing only on what foods are consumed. She had shared that the safety of IF is conditional on a person’s overall health status. 

Blood Sugar Fluctuations in Diabetes

For people living with diabetes or insulin resistance, fasting can lead to unpredictable changes in blood sugar levels. Unfrequent food intake increases the risk of low sugar levels, particularly in insulin-dependent individuals or those who take other medications that reduce sugar levels.

ALSO READ- Is Intermittent Fasting Safe for Women? Why the Rules Change with Your Cycle

According to Dr Jagadish, there are structured courses of fasting which can be helpful in metabolic well-being in a few individuals, though it should be closely monitored in those with chronic illnesses, to prevent unsafe drops or blood sugar spikes.

Influence on Medication Schedules

Many chronic diseases require medications that must be taken with food or at a specific time. These schedules may be disrupted through intermittent fasting, potentially reducing medication effectiveness or increasing side effects.

Our expert suggested that one consults with their physician before beginning a fasting regimen, especially if they are hypertensive, have thyroid issues, or gastrointestinal issues, to ensure medications remain effective.

Risk of Nutrient Deficiencies

Chronic illnesses also require a higher nutritional intake in people due to inflammation, stress, or medication. Rationing food consumption can cut the intake of nutrients if one does not plan their meals.

In the same interaction, Edwina claimed that a short eating window can lead to insufficiency of protein, fibre, vitamins and minerals required to manage diseases.

When Intermittent Fasting May Be Considered

In some medically supervised situations, intermittent fasting may be incorporated into treatment plans, particularly for metabolic conditions such as obesity or prediabetes. However, it should be customised and supervised by the healthcare practitioners.

According to Dr Jagadish, “Personalised nutrition strategies are far safer than adopting fasting trends without considering how they interact with existing health conditions.”

Bottomline

Intermittent fasting can offer metabolic benefits for some people, but it may not be appropriate for individuals with chronic illnesses without medical supervision. Understanding how fasting affects medications, blood sugar, and nutrient intake is essential before adopting the approach. Remember to always consult with your doctor before making any changes to your diet or routine.