There’s no single “best” diet to lose weight, since everyone is different. What works well for you might not work well for someone else, and vice versa. At the risk of sounding cliche, the best diet really is one that you can stick to, and that fits your goals and individual preferences. “The best way to lose weight is to slowly change your eating habits and physical activity over time,” says Blair Persyn, MS, RDN, LDN, CNSC, registered dietitian and owner of Bites with Blair. “The lifestyle changes have to be realistic and enjoyable or they will inevitably backfire.” If you’re not sure which diet is best for you, work with a qualified nutritionist who can help you decide.