The use of plants and their products as immunmodulators and therapeutics has a traditional history. However, the isolation of the active compound(s) involved did not gain much momentum till the 19th century. More than 64 per cent of the worlds population use botanic drugs to combat health problems and almost 50 per cent of the synthetic medicines has been derived from, or patterned after, phytochemicals. According to Christopher Columbus "Four vegetables are indispensable for the well being of man and these include wheat, the grape, the olive and the Aloe. Aloe vera has diverse biological...