My little Grandaughter who is 7 is a bit under the weather. We took care of her today and she also has a painful slit at the corner of her mouth. I get this now and again, for the last 50 years, when I am not 100%, as does my son, her uncle, and to get rid I take a vit B2 for a couple of days and hey presto, as does my son. My question is, is she too young for vit supplement? Poor little thing, it is quite painful.
I used to take vitamin supplements when I was that age, plus spoonfuls of some sort of gooey malt extract. My guess is she'll be fine (though I don't know if it will actually cure her)
Fine....if you think it will do some good......give it to her.
Mamya has given you the dose, but it is difficult to overdose....particularly in children.