Black Elderberry (Sambucus nigra), a fruit-bearing shrub native to Europe and North America, has long been researched for its immune boosting potential. Elderberry is unusually rich in anthocyanins, a class of flavonoids that may protect cells against damage or infections. Clinical and experimental studies suggest elderberry fruit extract is particularly useful against viral influenza.
Curcumin, a yellow pigment found in the curry spice turmeric, is one of the most popular nutritional and medical compounds used in India. In vitro and in vivo studies suggest antioxidant,anti-inflammatory, antiviral, antibacterial, antifungal, anti-amyloid and anticancer activities. Curcumin is substantially more bioavailable when consumed with piperine, derived from black pepper.