Acai weight loss diet supplements come in the form of powder, pills, pulp, juices and capsules. You must take the pills, capsules or the powder for weight loss. Juices and pulp have sugar that is to be avoided while you aim to become slimmer. The powder might not be easy to eat. So the remaining choices are pills and capsules only. Capsules are better among the two as it can have pure acai powder. The pills necessarily have some filling materials. It gives the acai powder a certain shape and strength. So for weight loss you should bank the most on the capsules only.