There's no single answer to this question since success depends on a lot of different factors - from the person's starting weight and body composition to their goals and lifestyle. However, we can look at some of the most popular weight loss programs to get an idea of what might work best for most people.
One program that has gained a lot of popularity in recent years is the ketogenic diet. This high-fat, low-carbohydrate way of eating has been shown to be effective for weight loss, as well as improving other health markers like blood sugar levels and cholesterol.
Another popular program is intermittent fasting, which involves cycles of feast and famine where you eat very little or nothing for periods of time followed by periods of normal eating. This approach can help to boost metabolism and promote fat burning.
Ultimately, the best weight loss program is the one that you can stick with long-term. That means finding a way of eating that works for you and your lifestyle - whether that's a specific diet plan or just making healthier choices most days of the week.