Colon cleansers and acai berries won't help with weight loss. The Mayo Clinic experts note that while acai berries can be a source of antioxidants and fiber, claims that the acai berry can aid in weight loss, as well as lower blood cholesterol levels and increase energy, are unsupported by scientific research.
According to Quackwatch.org, claims that acai berries help with weight loss are completely unfounded.
Acai berries can't hurt you, other than your wallet, but don't expect any miracles either.