There’s definitely some truth to that. I’m in the lucky position that my wife recently finished her education as a nutritionist (and she was very interested in the topic before that too). Personally I never was that interested into nutrition so it’s good that she keeps these things in mind, especially with our kids around. 
She was also the one to convert me to a plant-based diet 7 years ago which had some immediate effects on my health back then. I’ve used to have problems with impure skin, especially on my back, and that pretty much vanished over night as soon as I cut out milk.
I’m lucky to have her.