Last week, I suggested a do-it-yourself version of Dr Longo’s FMD diet, and offered sample recipes. I want to clarify that this version was not authorized by Dr Longo or his associates at USC. In fact, they have a large team with expertise in different aspects of health, nutrition and aging, and they have developed a specific package of prepared foods and micronutrients, intended to be administered under a doctor’s supervision. The package will soon be available as a kit from marketed under the brand . This specific diet has been tested in a clinical trial, and the results reported in a last month. I designed the recipes on a spreadsheet, and adjusted quantities to recreate the calorie content and the proportions of macronutrients (protein, carbohydrate, and oils) closely matching the FMD. But I know nothing about the actual ingredients in the Pro-Lon package, or the supplements they contain. The ingredients have not yet been announced, and my recipes haven’t been tested in aclinical trial. I am enthusiastic about the FMD idea, and I am trying it myself this week. I certainly encourage you to do the same, and I believe that five days of light vegan meals with limited protein and a high proportion of fat is likely to be safe and healthy. This is my recommendation, and not endorsed by Dr Longo. , created with data from , in cooperation with Enid Kassner.