Do vitamin C tablets protect against colds? How dangerous is vitamin D deficiency?
Beat Knechtle in conversation with Martina Huber for Beobachter 03/2024.
“Every housewife overtakes me. But I train 25 to 30 hours a week.”
The full interview in the latest issue of Beobachter Spezial: Gesundheit: https://www.beobachter.ch/magazin/gesundheit.