Excipients are additives used to convert active pharmaceutical ingredients into dosage forms suitable for administration to patients. New and modified excipients continue to emerge with better drug delivery performance. Synthetic polymers offer a broad range of properties that can be reasonably well “built-in” by design and modified by altering polymer characteristics. Excipients of natural origin are of particular interest to us for reasons of reliability, sustainability and avoiding reliance upon materials derived from fossil fuels. Plant products are therefore attractive alternatives to synthetic products because of biocompatibility, low toxicity, environmental “friendliness”, and low price compared to synthetic products. Excipients from natural products are also generally non-polluting renewable sources for the sustainable supply of economical pharmaceutical products.