Quick question on this species:

I have managed to get a small colony of these for very, very cheap. I studied up on the care and breeding of them quite a bit.

My questions pertain to feeding.

Most every site and book I have read so far on them implies that dusting crickets is mandatory.

Is this true or is this a case of necessity due to a limited variety diet?

If dusting is necessary, what supplement do you experienced keepers recommend?