Duocal is a protein-free powdered supplement that adds calories to foods and drinks without adding protein. Classified as a medical food, it provides roughly 492 calories per 100 grams through a blend of fat and carbohydrates. It’s most commonly used for children and adults who need extra energy but can’t tolerate additional protein or fluid, such as those with kidney disease, liver disease, severe food allergies, or failure to thrive.
What Duocal Contains
Duocal is intentionally simple. Per 100 grams of powder, it delivers about 72.7 grams of carbohydrate and 22.3 grams of fat, with zero protein. It’s also milk protein free and low in electrolytes, which matters for people on restricted diets where minerals like sodium, potassium, or phosphorus need to be carefully controlled.
The powder comes with a small scoop. One level scoop weighs about 5 grams and provides 25 calories. That makes it easy to add measured amounts of energy to a meal or drink without dramatically changing the volume of food on the plate. For context, adding four scoops to a bowl of oatmeal would boost it by 100 calories while barely changing how the food looks or tastes.
Who It’s Designed For
Duocal serves two broad groups: people who need more calories than they can comfortably eat, and people whose medical conditions restrict what forms those calories can take.
For children with failure to thrive, Duocal offers a way to increase caloric intake without introducing proteins that could trigger allergic reactions. This is especially relevant for kids with multiple food protein intolerances, eosinophilic esophagitis, gastroesophageal reflux disease, or atopic dermatitis. Because only proteins cause true food allergic reactions, a protein-free calorie source sidesteps that risk entirely.
Adults and children with kidney disease, liver disease, or conditions involving high metabolic stress also benefit. These conditions often require diets that are high in energy but low in fluid and electrolytes. Duocal fits that profile: concentrated calories in a small amount of powder, without the extra minerals or protein that could complicate treatment. The product is not suitable for children under one year of age, and the amount used depends on a person’s age, weight, and specific medical situation.
How to Use It
Duocal dissolves into both liquids and soft foods. You can stir it into formula, juice, soup, mashed potatoes, yogurt, or essentially any food that can absorb a fine powder. The “super soluble” formulation is designed to blend in without creating lumps or noticeably changing the flavor of whatever you’re adding it to. This makes it practical for picky eaters or children who might refuse food that tastes or looks different.
Because the dosing depends entirely on individual caloric needs, the amount varies from person to person. A healthcare provider typically recommends how many scoops to add per meal or per day based on the calorie gap between what someone is eating and what they need. There isn’t a universal dose.
Storage and Shelf Life
Once you open a container of Duocal, the powder stays good for one month. Keep it sealed between uses in a cool, dry place. If you mix Duocal into a food or drink and don’t finish it right away, refrigerate the mixture and use it within 24 hours. After that, it should be discarded. These timelines apply to the mixed product specifically. The dry powder in its original container is more forgiving as long as you stay within that one-month window.
Why Protein-Free Matters
Most calorie supplements on the market contain at least some protein, whether from milk, soy, or other sources. That’s fine for most people, but it creates a problem for anyone managing food allergies or conditions where protein intake needs to be tightly controlled. Duocal fills a gap that standard nutritional shakes and powders can’t. A child allergic to multiple food proteins, for example, may already be on a highly restricted diet. Adding a protein-containing supplement could trigger the very symptoms their diet is trying to avoid. Duocal lets caregivers boost calories independently of protein, giving dietitians more flexibility to build a meal plan that meets energy needs without exceeding safe protein levels.
This same principle applies in metabolic conditions where the body can’t process certain amino acids properly. In those cases, every gram of protein matters, and the ability to add energy without adding protein gives clinicians a useful tool for keeping caloric intake on track.