Best protein foods for weight loss were yoghurt, peanut butter, walnuts and other nuts, chicken without skin, low fat cheese and seafood.
Want to gain weight? Go for meat, chicken with skin, and regular cheese.
These foods were associated with weight changes over 4 years in 3 large cohort studies http://www.ncbi.nlm.nih.gov/pubmed/25854882.
And another win for #peanutbutter.