Fatigue due to menopause or a deficiency? This way you know the difference

Important: Sudden severe fatigue, weight loss, fever or night sweats always merit medical evaluation. See Thuisarts.nl — fatigue. This article does not replace a diagnosis.

Transition or deficit: why it feels so confusing

Fatigue is the most commonly reported menopausal symptom — often before hot flashes. At the same time, many women around 45 also have deficiencies that cause the same complaints. Declining estrogen and progesterone disrupt sleep and temperature regulation; at the same time, the absorption of certain nutrients decreases and the need for vitamin D increases.

The NHG standard Menopause emphasizes that your doctor must rule out other causes if complaints persist. Hormonal fatigue and deficiencies are not mutually exclusive — they often reinforce each other. Also read our extensive article about fatigue during menopause for the broader picture.

Hormonal fatigue: do you recognize this pattern?

Sleep that does not restore

You lie in bed for eight hours but wake up tired. Night sweats, hot flashes or worrying due to hormonal fluctuations fragment your sleep cycles. During the day, many women compensate with extra caffeine, which disrupts the next night.

Energy that fluctuates with your cycle

In perimenopause, good and bad weeks can alternate without apparent illness. That fits with hormones; with a pure deficit the curve is often more constant.

Brain fog and irritability

Fatigue during menopause is often accompanied by concentration problems — see concentration and work in menopause. Emotional exhaustion belongs to both categories, but hormonal dips sometimes follow your menstrual cycle.

Common shortages after 40

Iron and ferritin

Heavy periods during perimenopause can deplete iron stores. Ferritin below 30 µg/L causes complaints in many women, even if hemoglobin is "normal". Symptoms: shortness of breath when climbing stairs, pale skin, palpitations, hair loss.

Vitamin B12

B12 deficiency causes fatigue, tingling and memory problems. Risk increases with age due to reduced absorption. Vegetarians and women on stomach medication need extra attention.

Vitamin D

Deficiency in women aged 50+ is very common in the Netherlands. Symptoms overlap with menopause: fatigue, muscle weakness, sadness. Read: vitamin D deficiency symptoms.

Thyroid (TSH)

Hypothyroidism imitates menopausal symptoms: weight gain, cold intolerance, dry skin. Thyroid gland and menopause deserves separate investigation if fatigue persists.

Step-by-step plan: this is how you find out

1. Symptom diarytwo weeks:sleep hours, hot flashes, cycle, energy (1–10)
2. GP consultation: request specific blood tests — ferritin, B12, 25-OH-vitamin D, TSH, glucose
3. Assess Results: "Normal" lab range is wide; discuss optimal values for your age
4. Treat deficiencies first: supplementation according to doctor; repeat measurement after 8–12 weeks
5. Address hormones: sleep hygiene, stress, possibly discuss hormone therapy
6. Lifestyle: limit alcohol, exercise moderately, eat high in protein

The Health Council recommends vitamin D supplementation for women over 50. Combine this with iron from food (red meat, legumes, spinach with vitamin C) and do not leave ferritin untreated if it is low.

When is menopause likely?

If blood tests rule out or correct deficiencies, and fatigue continues to be accompanied by hot flashes, cycle changes and sleep disturbance, this points to hormonal causes. Perimenopause can last years — patience and structure help more than taking new supplements without a plan.

Work-related stress increases exhaustion. TNO research shows that half of working women experience menopausal symptoms. Discuss adjustments with your manager if concentration and energy decrease — see impact on work.

For daily support after deficiency correction: Xodil Daily Packs are caffeine-free and combine vitamin D, B vitamins and magnesium. Read the science and discuss supplements with your doctor if you are taking medication.

Remember: you don't have to choose between "it's menopause" and "it's a deficiency." Treat what is measurable, and tackle sleep and stress in parallel. That is the fastest way to noticeably more energy.

Common mistakes when tired after 45

Many women continue to run for years on willpower and coffee while ferritin or vitamin D is low. Others start a new supplement every month without blood monitoring — that becomes expensive and confusing. A third group waits too long to visit their GP because "everyone is tired during menopause".

A structured approach is better: first measure, then treat, and only then evaluate what hormonal remains. After eight weeks, note whether energy increases — if not, discuss next steps: sleep study, referral to endocrinologist or psychologist for mood complaints.

Nutrition supports recovery: protein at every meal, iron-rich food with vitamin C, and oily fish for omega-3. Avoid giving up exercise — light walking improves energy once deficiencies are corrected, even if you still have hot flashes.

RIVM emphasizes prevention and lifestyle at all ages. Fatigue is a signal to investigate — not a character trait. With the right combination of medical care, sleep and daily nutrients through an established system, most women see noticeable progress within three months.

Sources and further reading

• Thuisarts.nl — fatigue
• NHG — Standard Menopause
• Health council - nutritional standards
• Xodil — frequently asked questions

Frequently asked questions

How do I know if my fatigue is hormonal?

If deficiencies have been ruled out and complaints are accompanied by hot flashes, cycle changes and poor sleep, this points to hormones. A GP can help with assessment.

Which blood test should I request?

Minimum: ferritin, B12, 25-OH-vitamin D, TSH, hemoglobin. If there is a risk, also glucose and liver values.

Can I have a deficiency and menopausal symptoms at the same time?

Yes, that is very common. Address measurable shortages first; Hormonal complaints may then become clearer.

Does hormone therapy help against fatigue?

For some women it does, especially when sleep and hot flashes improve. Discuss the pros and cons — see transitional treatment reimbursement.

When should you go straight to the doctor?

For unexplained weight loss, fever, night sweats with fever, or fatigue that worsens severely within weeks.

Last updated: June 2026. This article does not replace medical advice. In case of persistent or serious complaints: contact your doctor.