These two people

Liam

and

Kylie

They both have degrees in this stuff. They focus on easy realistic healthy eating. You don't have to give up pizza, just eat a little less and add a salad. You don't have to give up brownies, just add beans for more fiber (trust the process, seriously). You don't have to give up instant ramen, just add some veggies. It's really not as hard as it's made out to be and they both do a very good job showing that.