Fringe Tree (Chionanthus virginicus)

Boldo is a strongly aromatic multi-branched evergreen shrub or tree growing to 20 feet. It has egg-shaped leathery leaves with a lemony scent, clusters of white or yellow bell-shaped flowers, and small yellow berries. Native to Chile and Peru, it has become naturalized in the Mediterranean region and the West Coast of North America, where it grows on dry sunny slopes and in mountain pastures in the Andes. It is widely cultivated, and its leaves are gathered throughout the year.

Andrographis, commonly known as Green Chiretta or King of Bitters, is an upright annual herb reaching approximately 3 feet in height. Native to India and cultivated throughout northern regions of India and China, this bitter medicinal plant has been valued in Ayurvedic and traditional Chinese medicine for centuries. MSK notes that it has been studied mostly for colds, flu and upper respiratory infections. The plant thrives on plains and in forest undergrowth, where its spotted pale brown or purple flowers and long seed capsules distinguish it from other medicinal herbs.

Bitter melon is an annual climbing vine reaching about 6.5 feet, characterized by deeply lobed leaves, yellow flowers, and distinctive orange-yellow fruit. Native to southern Asia and now common throughout tropical regions worldwide, it is harvested year-round. Its edible fruit is used both as food and in medicine to treat diabetes in regions including Asia, East Africa and the Caribbean; MSK says data on whether it lowers blood sugar are limited.

Black pepper is a perennial woody climbing vine growing to about 16 feet, with large oval leaves, spikes of small white flowers, and clusters of small round fruits that ripen from green to red. Native to southwestern India and now cultivated in tropical areas worldwide, the fruit is harvested from plants that are at least three years old. Different processing methods yield green, black, red, and white peppercorns, each with distinct flavors and uses. Cultivated as both a spice and medicine since ancient times, pepper was such a prized commodity in world trade that Attila the Hun reportedly demanded 3,000 pounds of it as ransom during his siege of Rome in 408 CE.

Milk thistle (Silybum marianum, sometimes Carduus marianus) is a tall biennial with spiny, white-veined leaves and purple, thistle-like flower heads. The main constituent of milk thistle extract is silymarin, and milk thistle was historically used for liver disorders and to increase breast milk production. NCCIH says trials in liver diseases, including hepatitis and fatty liver disease, have been conflicting or too limited to reach conclusions.

Psyllium, also known as flea seed due to its small brown appearance, is produced by several Plantago species. It has long been used as a laxative, and MedlinePlus lists it as a bulk-forming laxative used to treat constipation. The seeds and husks have a bland taste and develop a jellylike consistency when moistened due to their high mucilage content. The plants are extensively cultivated, especially in India, and propagated from seed in spring. Seeds are harvested when ripe in late summer and early autumn.

Triphala is not a single herb but a traditional Ayurvedic blend of three fruits: haritaki (Terminalia chebula), bibhitaki (Terminalia bellirica), and amalaki or Indian gooseberry (Emblica officinalis). Haritaki is described in Ayurveda as having five flavors (bitter, sour, astringent, salty, and sweet). Bibhitaki is described as pungent and warming. Amalaki is also described as having five flavors (sour, astringent, sweet, pungent, and bitter) and contains small amounts of anthraquinones.

Aloe vera (syn. A. barbadensis) is a succulent commonly grown as a potted plant, notable for its thick, fleshy leaves that contain two distinct medicinal components. Historically, the inner clear gel was used for skin conditions and to promote wound healing (NCCIH), while the bitter yellow sap from the leaf base, often called “bitter aloes,” is a strong laxative.