If you want to become fitter, don't think "I want to lose 10kg of weight", think about finding a sport which you like and healthy food which you enjoy eating.
Your belly might not disappear 100%, but you will feel better, and you are in for the long run.
The Popeye spinach meme is real.
I suppose if you come from a culture that eats insects you could also get a large amount of these compounds.
I don't know what would be considered too much spinach, personally I include it in my salads but not as the base (usually that's romaine for me), and sometimes Sautee some to go with eggs for breakfast, but I don't get it every grocery trip.
https://www.livestrong.com/article/529555-what-are-the-effec...