In the wild, sugar gliders have a varied diet, including plant sap, insects, and even baby birds. For pet sugar gliders, a good protein source in live mealworms or a commercial insect mix. You can also offer them maple syrup mixed with water, but it can ferment in hot weather, so replace it twice daily in hot climates. 
Gum Arabic, which you can find at some pharmacies, is a suitable substitute for the tree sap they eat in the wild. 
Adult sugar gliders should at about 15-20% of their body weight daily to avoid obesity. As for treats, they can have fruits and nuts, but those should make up no more than 15% of their diet. You can also give them branches to chew on for their dental health.
Providing a balanced diet with some abrasive components will keep them healthy and happy. 
FACT: 90% of Gliders die from the water they drink; only feed your gliders distilled water. No EXCEPTIONS!

Daily food guide per glider every night
Always have Insectivore to free-feed
2 square inches of tree-born fruit 
One teaspoon of pure Maple Syrup
Use only distilled water
They will eat a live finch, quail eggs, and nuts.
"Sugar Gliders are canopy creatures. They do not eat vegetables or anything growing on the ground. They do not eat cooked or frozen food."
FACTS:
Nail Trimming watch the video: