Eating less junk and more nutrient dense food! 
Also, according to human design there's other factors that are worth exploring that are highly individual based on a person's design. 
Here's three very different determinations to three different constitutions and food is not the only variable to properly absorbing the nutrients. 

https://image.nostr.build/796402c7c047473a39113cd4be801f7f4b3cd04d2c2b7a26efad3a9b68b90b2f.jpg
Or 
https://image.nostr.build/b79021ae7c9452cae3deff295d5fc0ed49d076474a3ec6e40eafe7d063fbbf91.jpg https://image.nostr.build/f34805d3fe4d41b57fd8aa5621b5f5eabf101d5bbf445ea7a54bcf345f4444d2.jpg