Hello and welcome to Health Check from the BBC.
I'm Claudia Hammond here for the next half an hour with the latest health news from around the world.
Why has the proportion of children with high blood pressure doubled in the last two decades?
More on that in a moment.
And to help me today, I have family doctor Ann Robinson.
How are you?
Hello, really good thing.
What do you have for us today?
Well, we're going to talk about that.
There's been a thumbs up for HRT hormone replacement therapy in the United States and how artificial tongues have got tongues wagging.
Looking forward to that one.
And weight loss injections have been touted as a treatment for all sorts of different diseases.
Now the results of two trials with people with Alzheimer's disease are out.
More on that later.
We are starting with these findings that the proportion of children with high blood pressure has doubled in the last 20 years.
The new study brings together data from 21 countries, from Argentina to Tanzania and France to Iran.
Kazem Rahimi,
who is professor of cardiovascular medicine and population health at the University of Oxford,
worked on the study and I asked him about the scale of the changes he's seen.
So on average what we saw that about one in 20 children had what we call hypertension,