At the time of listening, I was rather enjoying it, but now that it's finished, can't say that I learned something fundamentally new or important that I can implement in my daily life. That was not my first book on healthy lifestyle and food choices, though.
Most of the information is pretty basic with some less-known details, but a lot of that is just theory, interesting to learn, but it's not like you can do something about it, like information about the roles of vitamins.
The author says several times that vitamins from whole foods are much better than from supplements, but also talks as if everyone eats fortified cereals.
The book overall is based on and is written for the American society, so might be less helpful if you are not from the US. For example, if in your country fortified foods are not a common thing.
There is no info on multivitamins, vitamins and minerals are discussed separately. It is made clear, though, that too much of some specific vitamin or mineral can do more harm than good.
The course is based on the science, divided into lectures, comfortable to listen to. A lot of points are repeated, and I suppose it could be a few lectures shorter without all those repetitions.
I also didn't like some advice, like "don't finish all your food, get comfortable of throwing some last bites away", don't see what's the point of getting into that habit, buying smaller plates or having a portion in mind before cooking would be much better than throwing food away.
Overall, nothing really new, eat healthy and exercise, and you might have fewer chances of serious conditions, but as always there is no guarantee for that.
Would recommend it as basic intro to nutrition, if you know the basics already, might not be worth almost 19 hours. I speeded up a lot to finish it.