Food and Weight: What Should Your Child Eat Every Day?
The short answer: weight in DMD follows a curve that goes up first, then down — and both ends need guarding against. In a 2024 study of 93 boys aged 6–12, 41.8% had an abnormal nutritional…
What parents ask most “Since the steroids, he's always hungry and his weight keeps climbing. How do we control it without making him feel singled out at the table?” “How much protein and calcium should he have each day? Does he need vitamin D and calcium tablets?” “How much weight counts as overweight? Does BMI even work for a child with DMD?” “Later on, he coughs and chokes when he eats, and he eats less and less. What then?”
The short answer: weight in DMD follows a curve that goes up first, then down — and both ends need guarding against. In a 2024 study of 93 boys aged 6–12, 41.8% had an abnormal nutritional status: 11.8% underweight, 16.0% overweight and 14.0% obese. Overweight clusters at ages 9–13 (one study found a rate of 73% at that age, against only 6% at ages 4–8). After 18, the wind changes direction, and undernutrition becomes common. So both “feed him up, it will do him good” and “just feed him less” are wrong. It depends which stage he is in.
While he can still walk: the danger is getting fat
Steroids increase appetite while activity falls, so gaining weight is almost built in. And every extra pound makes walking and standing harder, and raises fracture and metabolic risk. The answer is not a separate “patient's meal” for the child. Guidance says the opposite: the whole family eats the same healthy food, with sensible portions, plenty of fruit and vegetables, fewer sugary drinks, low-fat milk and limited salt. A child who is not treated differently is a child who can stick with it.
For a rough guide to portions: the UMass Duchenne Program nutrition guide suggests starchy foods at about the size of one fist; protein at at least 1 gram per kilogram of body weight a day; and sodium kept within 1,500 mg a day — this last point works together with managing the blood pressure and fluid retention steroids can cause.
Calcium and vitamin D are not optional supplements. They are part of steroid treatment (and they link directly to bones — see Article 8). The dose should be set by the doctor, using blood results.
BMI is not fully reliable in DMD. With less muscle and more fat, the number can look “normal” while body composition is already out of balance. The trend in his weight, plus assessment by the doctor and a dietitian, is more trustworthy than BMI alone.
After walking is lost: the danger flips to getting thin
Once activity drops sharply, daily intake needs to fall by roughly 250–500 kcal just to hold weight steady. But later still, chewing and swallowing weaken, meals take longer and longer, and choking starts. The problem becomes getting food in at all. That is the time for a swallowing assessment and changes to food texture. If that is still not enough, talk seriously with the doctor about tube feeding or a gastrostomy. That is not “giving up on eating.” It is protecting his strength and his immune system. As for the supplements and creatine products passed around parent groups as “good for muscles”: this research found no reliable evidence to support routine use. Follow the guidelines and your doctor, and do not spend money on things with nothing behind them.
In China | Abroad
Access to nutrition clinics and swallowing assessments is limited, and most families work things out themselves, with help from parent groups. What is needed most is advice that fits how families actually eat: how to judge portions of staple foods, cooking oil and salt, and how to swap takeaways and snacks — not a copied Western menu. | Multidisciplinary teams abroad include a registered dietitian who follows up regularly. Weight, body composition and swallowing are part of routine review, and dietary advice switches as walking status changes.
Sources for this article
2024 nutrition cohort study (n=93, abnormal nutrition rates): https://www.mdpi.com/2072-6643/16/13/2143/pdf
DMD nutrition review (age pattern of overweight and undernutrition, PMC): https://pmc.ncbi.nlm.nih.gov/articles/PMC5490573/
UMass Duchenne Program nutrition guide (protein, sodium and portion advice): https://www.umassmed.edu/globalassets/duchenne-program/documents/dmd-101.pdf
