comma

17:02 Mar 17, 2020 

You are always the best. Thank you so much. It became clearer now. And thanks for all other efforts as well.

15:48 Mar 17, 2020 

Potentially, yes; but it might be better to look at it the other way round: until you have tasted it 8–10 times, you don't know if you REALLY don't like it or not!

15:39 Mar 17, 2020 

Eight to ten tastes here means that the kid need about 10 times to get familiar to one particular food, right?

12:57 Mar 17, 2020 

I beg to differ: 'repeated exposure' is perfectly fine here — and the meaning of 'repeat exposure' would actually be subtly different.
As for the second part of the phrase, that too is fine: the idea is, if you taste something once, it may be unfamiliar, and you may not be sure if you like it or not; the more often you taste it, the more familiar it becomes, and you may start to decide if you like it or not.
These concepts are particularly important for weaning babies, where it is necessary to get them into good dietary habits as early as possible, and just because a child doesn"t like a food on one occasion doesn't mean they might not grow to like it later...

12:10 Mar 17, 2020 

IMO, the English is poor in general.

Should be "repeat exposure", not "repeated exposure".
With just a simple comma is fine.
However, what comes after the comma doesn't make any sense - what does it mean? Should it be "repeat exposure builds on the familiar", "repeat exposure builds up familiarity"?

10:50 Mar 17, 2020 

I wouldn't make it a full stop and split the sentence, as the 'eight to ten' phrase would then be incomplete and rather "out on its own"
The final part of the sentence explains the first 2 phrases — rather than a comma, I would have tended to use an em dash or even a colon, but I do think it is important to keep the sentence together.

They learn from repeated exposure. Eight to ten tastes of a food — it's repeated exposure building on the familiar.

They learn from repeated exposure. Eight to ten tastes of a food: it's repeated exposure building on the familiar.

10:15 Mar 17, 2020 

I think the comma isn’t absolutely necessary, it’s only to do a longer pause in order to call more attention for the following matter.