Aloe vera L. for

Langmead L, Feakins RM, Goldthorpe S, Holt H, Tsironi E, De Silva A, Jewell DP, Rampton DS. Randomized, doubleblind, placebo-controlled trial of oral Aloe vera gel for active ulcerative colitis. Aliment Pharmacol Ther 2004 19(7) 739 7. 

The strong cross-reaction of the polysaccharide of Aloe vera, - which contains D-mannose, D-glucose, and a small proportion of galactose and a pentose, could also be attributed to the presence of multiple residues of d-glucose, since the gum recovered from the immune precipitate contained no galactose. A portion of the D-glucose in Aloe vera is (l->4)-linked and would account for the observed cross-reaction. 

Aloe vera gel (freeze-dried) produced no toxic effects in rats from either acute or sub-chronic oral doses (l-64mg/kg p.o. twice daily). In mice or rats, the preserved or fresh gel failed to cause any toxicity at doses up to 20 g/kg p.o. or i.p., and no toxic effects were found from a dose of 5 g/kg p.o. per day for 45 days. Life-long dosing of a freeze-dried filet of the leaves at 1% of the diet also failed to produce any deleterious effects. ... 

Gentilini, R, Bozzini, S Munarin, F., Petrini, P., Visai, L, and Tknzi, M. C. (2014]. Pectins from Aloe Vera Extraction and production of gels for regenerative medicine,/ Appl Polyin. ScL, 131(2], n/a-n/a. 

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