Taking medication or hormone blockers that reduce oestrogen can bring significant physical and emotional changes. Whether prescribed for cancer treatment, endometriosis, menopause management, or gender-affirming care, lowered oestrogen levels can affect energy, mood, muscle mass, bone health, and overall wellbeing. Many people report feeling more fatigued, foggy, or less resilient than before.
While oestrogen plays an important role in energy regulation, metabolism, and tissue health, it is still possible to feel well and supported without it. Nutrition, movement, and daily routines become even more important during this time. With the right strategies, you can maintain strength, energy, and quality of life while your body adapts.
Why Energy Can Drop When Oestrogen Is Low
Oestrogen influences how the body uses carbohydrates and fats for energy, supports muscle repair, and plays a role in iron metabolism and bone health. When oestrogen levels fall, people may experience:
- Increased fatigue or slower recovery
- Reduced muscle mass or strength
- Changes in body composition
- Lower exercise tolerance
- Fluctuations in mood or sleep quality
These changes are physiological, not a reflection of motivation or effort. Supporting the body through nutrition and consistent routines can help offset many of these effects.
Prioritising Enough Energy Intake
One of the most common contributors to low energy while on hormone blockers is under-fuelling. Appetite can change with medication, but energy needs do not disappear. Eating regularly and eating enough becomes essential.
Helpful strategies include:
- Eating three meals per day, with snacks as needed
- Including carbohydrates at each meal for energy
- Avoiding long gaps between meals
Carbohydrates such as oats, rice, bread, fruit, legumes, and potatoes remain important for fuelling the brain and muscles, especially when hormonal support is reduced.
Protein for Muscle, Strength, and Recovery
Oestrogen helps protect muscle tissue, so when levels are lower, adequate protein intake becomes even more important. Protein supports muscle maintenance, immune function, and recovery from daily activity.
Aim to include a protein source at every meal and snack, such as:
- Eggs, dairy, yoghurt, or cheese
- Chicken, fish, lean meat
- Tofu, tempeh, lentils, or chickpeas
- Nuts, seeds, or nut butters
Spacing protein intake evenly across the day is more effective than consuming it all at once.
Supporting Bone Health Without Oestrogen
Oestrogen plays a key role in maintaining bone density. When levels drop, nutrition and movement are critical to reduce bone loss.
Key nutrients to prioritise include:
- Calcium from dairy or fortified plant milks
- Vitamin D (through sunlight or supplements if required)
- Protein to support bone structure
- Magnesium and phosphorus from wholegrains, nuts, and seeds
Weight-bearing and resistance exercise also help stimulate bone formation and maintain strength.
Managing Fatigue Through Blood Sugar Stability
Low oestrogen can increase sensitivity to blood sugar fluctuations. This can show up as energy crashes, shakiness, or brain fog.
To support stable energy:
- Pair carbohydrates with protein and healthy fats
- Choose regular meals rather than grazing on low-energy foods
- Include fibre-rich foods such as vegetables, fruit, legumes, and wholegrains
Balanced meals help provide sustained energy rather than short-lived boosts.
Practical Meal Ideas for Energy Support
- Porridge with milk, yoghurt, fruit, and seeds
- Wholegrain toast with eggs and avocado
- Rice, vegetables, and salmon or tofu with extra virgin olive oil
- Lentil or bean-based soups with wholegrain bread
- Yoghurt with fruit and nuts as a snack
These meals provide carbohydrates for energy, protein for recovery, and fats for satiety.
Movement That Supports Energy (Not Depletes It)
Exercise remains important but may need to be adjusted. Gentle resistance training helps maintain muscle and bone health, while low-impact cardio supports cardiovascular health without excessive fatigue.
Listening to your body and allowing adequate recovery is key, especially during periods of hormonal adjustment.
Sleep and Stress Matter More Than Ever
Sleep disturbances are common with low oestrogen. Supporting sleep through regular meal timing, limiting caffeine later in the day, and maintaining a consistent bedtime routine can make a meaningful difference.
Chronic stress increases fatigue and worsens hormonal symptoms. Simple stress-management practices, such as walking, stretching, or breathing exercises, can help support energy levels.
Take Home Message
Low oestrogen can impact energy, strength, and wellbeing, but it does not mean you have to feel constantly depleted. Eating regularly, prioritising carbohydrates and protein, supporting bone health, and adjusting movement can help you feel more resilient while taking hormone blockers or oestrogen-reducing medications.
If you’d like personalised, evidence-based nutrition support during this time, Feed Your Future Dietetics can help. With over 10 years of experience and voted one of Canberra’s best dietitians in 2025, Feed Your Future Dietetics provides individualised Telehealth and Zoom consultations to support people across Australia — helping you nourish your body and maintain energy, no matter where you are in your health journey.
