Yes! But you have to watch the number of carbs you are ingesting per serving for ketosis. The net carbs in SlimFast keto shake products are pretty high, despite being high in fat.  They are “low carb” but if you have more than four shakes a day, that is 20+ carbs. The ingredients are also pretty processed. They are convenient, though, being one of the only products that are ready-to-drink for ketosis diets.