Nuvacal 1.3 is a plant-based, vegan tube-feeding formula providing approximately 1.3 kcal per millilitre. It contains ingredients including soya beans, green peas and soya protein isolate.

Nuvacal 1.6 provides approximately 1.6 kcal per millilitre and contains more protein per millilitre than Nuvacal 1.3. This formula contains milk protein. A higher energy density may be appropriate when more energy is required in a smaller volume.