Women, fasting may affect your hormones — here’s how

According to Dr Thukral, insulin is one of the primary hormones fasting affects, as the body shifts from food-based energy sources to stored energy, insulin levels drop, affecting blood sugar regulation. However, if fasting continues for an extended period or becomes a regular practice, the body may respond by increasing cortisol, the stress hormone.

High cortisol levels disrupt reproductive hormones like estrogen and progesterone, leading to hormonal imbalances. For some women, this can result in menstrual irregularities, mood swings, or a general feeling of fatigue. Additionally, fasting can reduce leptin, a hormone responsible for regulating appetite and energy stores. When leptin levels are low, the body may interpret this as a signal to conserve energy rather than prepare for reproduction, potentially affecting menstrual cycles and fertility.

Does fasting affect your period?

Yes, fasting can impact the menstrual cycle, particularly when caloric intake is significantly reduced or when fasting is prolonged. Dr Thukral notes that when the body perceives fasting as a form of stress or malnutrition, it may prioritise essential survival functions over reproduction. This can result in delayed or missed periods, known as amenorrhea, as well as irregular cycles. Some women may also experience lighter or shorter periods during fasting due to hormonal shifts. Mood swings, fatigue, and other symptoms related to hormonal imbalance are also commonly reported.

For women with pre-existing hormonal imbalances, such as those with polycystic ovary syndrome (PCOS), fasting may exacerbate symptoms, making the condition more challenging to manage.

How to fast mindfully

It is essential to approach fasting mindfully to minimise the potential negative effects of fasting on hormonal health. Dr Thukral suggests that women prioritise hydration and make sure they consume nutrient-dense foods during the non-fasting hours. A balanced mix of proteins, healthy fats, and fibre-rich foods can help maintain blood sugar levels, support hormone balance, and keep stress at bay.

It is also crucial to listen to your body and break the fast if you experience dizziness, extreme fatigue, or other signs of hormonal imbalance.

Who should avoid fasting?

Fasting may not be suitable for all women, particularly those with specific health conditions or life stages that demand higher nutritional intake. Dr Thukral outlines the following groups of women who should avoid fasting:

• Pregnant or breastfeeding women: Nutritional requirements are significantly higher during these stages, and fasting can negatively affect maternal and foetal health.
• Women with a history of eating disorders: Fasting could trigger unhealthy behaviours and potentially worsen mental health conditions.
• Women with menstrual disorders: Those with conditions like PCOS or amenorrhea should avoid fasting, as it can further disrupt hormone balance.
• Women with underlying health issues: Women with metabolic conditions, such as diabetes or thyroid disorders, should fast only under medical supervision, as it can pose serious health risks.

DISCLAIMER: This article is based on information from the public domain and/or the experts we spoke to. Always consult your health practitioner before starting any routine.