Standardized to 80% Silymarin Using a Full-Profile, Natural Extraction in a Base of Raw Milk Thistle Seed. Optima Valitudine "Excellent Health" Herbal Supplement Only Complete Concentrates use standardized, full-profile herbal extracts of an all-natural water or water/alcohol extraction process without harmful solvents, such as acetone, hexane or denatured alcohol, and without excipients, such as maltodextrin. Complete Concentrates are made with an active base of pure herb without any fillers, binders or flowing agents.