Even if you are still enjoying regular meals, it may not be such a bad idea to take in the occasional Boost drink or Ensure drink, especially if you are still very physically active. It isn’t just for people that have low appetites. It may be for seniors with higher caloric needs than their more sedentary counterparts. As a small person, I know that it is sometimes simply difficult to eat enough mass to take in enough nutrients. That’s where densely nutritious foods and supplements can really come in handy.