If you search the Web for Aloe vera juice benefits, you’ll come across health claims ranging from weight loss, low cholesterol, detoxification and improved digestion to immunity, healthy skin and hair, hydration and blood sugar control.
However, studies have not supported all of these claims. In fact, evaluation of long-term use has shown that ingesting the plant may actually be harmful. For example, Aloe vera used as a digestion promoter has been shown to increase losses of potassium (critical to muscle control) so much that it reduces intestinal wall function over time.
Research has highlighted other dangers of taking Aloe vera as well. In a study including rats and mice given oral Aloe vera gel, latex and whole leaf extract, rats experienced dehydration and diarrhea. And in the case of those given whole leaf extract, carcinogenic activity was observed in intestinal cells.
There’s still not enough research to draw a conclusion
Despite this research, it is not yet clear which part of the plant or what dosage may cause these effects in the human body. In fact, documentation reveals that some patients have taken Aloe vera in liquid or capsule form regularly without harm. But with research pointing to some more troubling possible effects, it’s best to proceed with caution for now.
Source - specertified.com/blog/view/drinking-aloe-vera-is-it-safe