Watch him carefully, a beardie his age shouldn't have superworms at all or mealworms. At 6 months or older he can have superworms once or twice a week, only 3-4 max as these are treat feeders and not staple feeders. For mealworms once he's that age he can have 5-10 every other day.
I'm sure he could probably digest it, but if you see him struggling to go to the bathroom take him to a reptile vet.
http://www.anapsid.org/vets/#vetlist
Here is a list of a few reptile specialist vets.
Can you please answer a few questions for me, this will tell me if he has anything wrong with his setup.
Is her UVB a exo terra, zoomed/reptisun, all living things, or zilla brand?
Is it a compact/coil bulb, a MVB, or a tube light?
How old is the
UVB bulb?
If tube light is it a T5 or a t8?
If tube light is it a 5.0 or a 10.0, or a 12% or 14%?
Is it mounted underneath the screen or on top.
How many watts is it?
How many inches is it from the basking spot?
What is her basking spot?
What is her warm side?
What is her cool side?
How are you monitoring these temps, temp gun/digital temp gauge/plastic gauge?
Do you use bulbs at night?
If so are they colored or produce only heat?
What type of basking light does he have?
What sized tank does she have?
How old is she?
How big is she head to tail?
How much does she weigh?
What are you feeding her for insects? (just mealworms or other bugs as well?)
How many feedings are you trying to give him?
How much do you put in his tank per feeding?
What are you feeding him for salad?
What supplements are you dusting with?
How many times a week are you dusting?
What substrate/flooring/bedding does he have?