Exploring the health risks of intermittent fasting: What you need to know


Intermittent fasting has gained popularity as a weight loss strategy and purported health booster in recent years. However, like any dietary approach, it comes with potential risks that individuals should be aware of before diving in.

In this article, we’ll delve into the health risks associated with intermittent fasting, providing valuable insights to help you make informed decisions about your fasting journey.

Understanding Intermittent Fasting:


Intermittent fasting involves alternating periods of eating with periods of fasting, with various fasting protocols ranging from daily time-restricted feeding to longer fasting periods lasting multiple days. While some studies suggest potential health benefits, including weight loss, improved metabolic health, and enhanced longevity, it’s essential to consider the potential risks associated with this dietary approach.

Nutrient Deficiencies:

One of the primary concerns with intermittent fasting is the risk of nutrient deficiencies, particularly if fasting periods are prolonged or not properly planned. Restricting food intake for extended periods can lead to inadequate intake of essential vitamins, minerals, and other nutrients necessary for overall health. To mitigate this risk, individuals should focus on nutrient-dense foods during eating windows and consider supplementation if necessary.

Disordered Eating Patterns:

Intermittent fasting may exacerbate or trigger disordered eating behaviours in susceptible individuals. The strict adherence to fasting schedules and the focus on food restriction can contribute to an unhealthy relationship with food and lead to binge eating or other eating disorders. It’s crucial for individuals with a history of disordered eating or those prone to obsessive thoughts about food to approach intermittent fasting with caution and seek support from healthcare professionals if needed.

Hormonal Imbalances:

Prolonged fasting or extreme calorie restriction can disrupt hormonal balance in the body, potentially leading to adverse effects on reproductive health, thyroid function, and stress hormone levels. Women, in particular, may experience disruptions to menstrual cycles and fertility with overly restrictive fasting protocols. Monitoring hormonal changes and consulting with a healthcare provider are essential for individuals, especially women, considering intermittent fasting.

Increased Risk of Overeating:

While intermittent fasting may initially lead to weight loss by reducing overall calorie intake, it can also increase the risk of overeating during eating windows. The psychological aspect of fasting, such as feeling deprived or experiencing intense hunger, may lead individuals to consume larger portions or indulge in unhealthy foods when they do eat, negating any potential benefits of fasting. Practicing mindful eating and focusing on balanced meals can help prevent overeating.

Adverse Effects on Mood and Energy:

Fasting can affect mood and energy levels, especially during the initial adjustment period. Some individuals may experience irritability, fatigue, or difficulty concentrating while fasting, which can impact daily activities and overall well-being. It’s essential to listen to your body’s cues and prioritize self-care during fasting periods, including adequate hydration, rest, and stress management techniques.

While intermittent fasting has been touted for its potential health benefits, it’s essential to consider the associated risks and potential drawbacks. Nutrient deficiencies, disordered eating patterns, hormonal imbalances, increased risk of overeating, and adverse effects on mood and energy are among the health risks individuals should be aware of when embarking on an intermittent fasting regimen. As with any dietary approach, moderation, mindfulness, and personalised guidance from healthcare professionals are key to ensuring a safe and sustainable fasting journey.