Raw Vegan, Low Carb, Carnivore, Vegetarian, Mediterranean, and on and on. They all claim to the the “best” for a dietary intervention. Clinically there is truth and error in every claim. How can we as clinicians decide what is bets for the patient as we guide them into dietary recommendations that best fir their health needs and personal choices. What are the universal recommendations that help every diet change? How may each diet change help or potentially harm the patient health? And critically, how can we monitor their progress?