Abstract: Consumable products and methods for improving health, strength, and lifespan are disclosed. The products comprise non-refined complex carbohydrates (10 to 50% of total calories), and healthy fats (20 to 40%). The consumable products can also comprise proteins (30 to 60%). L-methionine may also be included. Consumable products are provided in various forms, including bars, shakes, powders, and frozen items. The methods involve substituting one or more meals with a consumable product for predetermined periods, offering nutritional benefits without calorie restriction, improving biomarkers, and reducing frailty.