News

Metformin is well proven – but over time it can lower vitamin B12 levels. What happens in the gut, which symptoms are typical and why measuring beats guessing.

Alcohol can affect the absorption, storage and excretion of vitamin B1, B12 and folate. What is documented, which signs to take seriously and how to measure your levels.

Coffee demonstrably reduces iron absorption from meals – for magnesium, calcium and fluids the effect is smaller than often claimed. What is documented, who should look closer and how to measure it.

Dead tired in the evening, wide awake in bed, wiped out in the morning? What the daily curves of cortisol and melatonin look like, what shifts them and how to interpret individual values with care.

You can't get going in the morning but are wide awake in the evening – or the other way round? What a chronotype is, how you can assess yours and what shifts your rhythm without you noticing.

Night shifts, early shifts or simply the alarm at six: how work shifts your internal clock, what shift work demonstrably changes, what social jetlag means and what you can try.

Dead tired, but your mind is racing and your heart is pounding: why stress keeps the body in alarm mode at night, what other causes can lie behind inner restlessness and when you should see a doctor.

Your stomach feels tight more often than it used to, even though you are not eating any differently? What hormones in perimenopause, stress, exercise and food intolerances have to do with bloating, and when it should be checked by a doctor.

Full after dinner and yet you still end up at the sweet cupboard? What sleep, stress, meals and your cycle have to do with cravings, and what is merely speculation.