What is the best legal and best muscle gaining protein?

I’m going to be a 10th grader next year in high school and I’m lifting in the summer offseason program called JABS and I need a protein that gains muscle but is also legal for me too use. any tips besides advocare i heard that stuff isn’t very reliable and the results my buddies get aren’t very great either so help me out

beef, chicken and fish

AdvoCare® Muscle Fuel A synergistic blend of 28 vitamins, minerals, botanicals and other energy-producing intermediates that supports multiple metabolic processes* Helps maintain & restore energy supplies during & after physical activity* Supplies essential components for muscle gain*…

Muscle GainTM $71.95 It’s nearly impossible to get enough protein from diet alone without also getting excess calories fat and carbohydrates. Muscle Gain® protein shake is a metabolically balanced blend of high-grade proteins that supplies amino acids and other nutrients that are essential to protein synthesis and muscle building in an easy-to-digest formula that includes digestive enzymes like papin and bromelain to…

AdvoCare Muscle Gain Protein Shake Pouches …