On Optavia, you'll be eating four times a day, so it's important to have a varied diet. This can be a challenge because you need to know what you're allowed to eat between fuelings. When you first start on Optavia, you'll need to learn what you can eat between meals. You typically won't be able to eat food with a lot of sugar, and you'll also need to avoid dairy. You can also eat other foods that are low in calories, such as vegetables or fruit. There are many reasons why you might be restricted from eating certain foods. You may have to avoid dairy, for example, because your body can't tolerate it. Other reasons might be because you have certain food allergies or sensitivities. If you are struggling to find what you can eat between meals, you can also ask your doctor or dietitian. They should know what you're allowed to eat.