Unless prescribed by a doctor for a specific condition, we do not need diets. We need nutrition. We are often influenced by family and friends to try the latest fad diets because it works great for them. But, as discussed in the article linked below, not everyone enjoys the same results. Our body chemistry is unique to us. That is why it is difficult to declare a universal “best diet” that works for all.
The ketogenic diet—or, Keto—is the rage of the decade. Adherents are rabid about it. Keto dieters make one simple argument: It works! Yes, it works. That is why it is so popular. But, is it safe? The research is not yet conclusive. Yet, contrary to keto lovers’ claims, there are several studies associating long-term keto dieting with a host of medical maladies. And consider this: not a single reputable fitness/health certifying agency recommends the use of the ketogenic diet except under the care and supervision of a doctor. Read this linked essay for the thoughts of a professional dietician.
Ideally, we should avoid packaged foods. Realistically, that is not practical. Therefore, make it a habit to read fully the nutritional labels on packaged foods. And it is extremely important to know what all those terms mean. Follow this link for a primer.