Waking Up Exhausted? Why Your "Spring Fatigue" Might Be Low Iron or Vitamin D

Swiss Medical Services
Feb 26
3 min read

The days in Prague are finally getting a little longer, and the first hints of spring are in the air. Yet, instead of feeling energized by the shifting seasons, you are struggling to drag yourself out of bed. By 2:00 PM, your brain feels foggy, your body feels heavy, and all you want is another coffee.

If you mention this to a local colleague, they will likely nod knowingly and diagnose you with jarní únava (spring fatigue).

While "spring fatigue" is a culturally accepted phenomenon in the Czech Republic—often blamed on changing weather patterns and daylight savings—true, persistent exhaustion is usually rooted in a physiological deficit. After a long, dark Central European winter, your body’s reserves are likely depleted.

The two most common culprits? Vitamin D and Iron.

The Prague Winter Deficit: Vitamin D

Vitamin D is not just a vitamin; it acts like a hormone in the body, regulating immune function, mood, and energy production. We synthesize it primarily through sun exposure on our skin.

Given that Prague experiences notorious grey inversions from November through February, it is almost impossible to maintain adequate Vitamin D levels naturally during the winter. By late February, your summer reserves are completely exhausted.

The Symptoms: Beyond severe fatigue, severe Vitamin D deficiency can cause bone or muscle aches, a weakened immune system (catching every cold that goes around), and a persistently low mood or "winter blues."

The Hidden Energy Thief: Low Iron (Anemia)

While Vitamin D drops seasonally, iron deficiency is a chronic issue that often goes unnoticed until it becomes severe. Iron is essential for producing hemoglobin, the protein in red blood cells that carries oxygen to your brain and muscles. When iron is low, your body is literally starving for oxygen.

The Symptoms: Extreme exhaustion, pale skin, cold hands and feet, shortness of breath after minor exertion (like walking up the stairs from the Metro), and an inability to concentrate. It is particularly common in women, but can affect anyone with a poor diet or underlying digestive issues.

Stop Guessing at the Pharmacy

When expats feel this kind of fatigue, the first instinct is often to visit the local lékárna (pharmacy) and buy a handful of over-the-counter multivitamins.

This is a mistake for two reasons:

Absorption and Dosage: Pharmacy supplements are often too weak to correct a severe, medically diagnosed deficiency.
Toxicity Risk: While it is hard to overdose on Vitamin C, taking high doses of fat-soluble Vitamin D or Iron without knowing your baseline can lead to toxicity or severe gastrointestinal distress.

Get the Full Picture with a Medical Blood Panel

At Swiss Medical Services, we don't believe in guessing when it comes to your energy levels. If you are struggling with persistent fatigue, the fastest way to get your life back is through a comprehensive blood panel.

Our English-speaking doctors will test your Vitamin D levels, complete a full iron panel (including Ferritin, your body's iron storage), and check your thyroid function—another common cause of unexplained exhaustion.

Once we know exactly what your body is missing, we can provide targeted, prescription-strength treatments, including high-dose Vitamin D protocols or iron therapies, to get you back to your energetic self.