Blood test

Potassium deficiency symptoms: how to recognize them—and how not to The essentials at a glance Three signs are proven in potassium deficiency: muscle weakness, paralysis, and cardiac arrhythmias. The German Nutrition Society (2016) lists these signs. Fatigue is not one...

Weight not going down: which values you should check The essentials at a glance There are four explanations for a plateau on the scale, and you can check three of them without laboratory tests. The most common is the measurement...

Fatigue, lack of motivation, low drive, irritability: what lies behind them The essentials at a glance There is a dedicated primary-care guideline for this combination of symptoms—and it is surprisingly specific. According to DEGAM, five laboratory tests should be performed...

How long does it take for vitamin D to work? Blood levels and how you feel The essentials at a glance The question can only be answered by breaking it down into two questions. There are figures for the blood...

Meeting your daily vitamin B12 requirement: the figure and how to achieve it The essentials at a glance The daily requirement is quickly stated: The German Nutrition Society estimates that adults need 4.0 micrograms of vitamin B12 per day, pregnant...

fT3 value too low: what the laboratory value means—and what it does not The essentials at a glance According to IQWiG, a low fT3 value may indicate hypothyroidism—but by itself, it says nothing more. The thyroid is first assessed using...

Symptoms of iron deficiency: How to recognize it—and how not to The most important points at a glance According to IQWiG (2023), typical symptoms of iron deficiency include pale skin, fatigue, unusual exhaustion after exertion, difficulty concentrating and forgetfulness. All...

When should you take electrolytes? The 5-step timing plan The key points at a glance Electrolytes should be taken when an actual loss has occurred or is imminent—not preventively as a daily routine. The best time is therefore always linked...

Find out how selenium and the thyroid are connected, why a deficiency often goes unnoticed, and when testing makes sense. Your path to more energy.