Theory:

The plants which possesses therapeutic properties are known as medicinal plants.
The historical background of medicinal plants is as old as the historical background of human beings. The majority of the medicines are directly or indirectly obtained from plants. The major system of medicines such as the Ayurveda, Yoga, Unani, Siddha, Homeopathy (\(AYUSH\)) use drugs that are obtained from plants and animals. The drugs that are obtained from medicinal plants are called secondary metabolites.
  
Primary and secondary metabolites:
  • The substances produced by the plants for their own living, such as carbohydrates, amino acids etc., are known as primary metabolites.
  • The substances produced by the plants for protection, competition and species interaction are known as secondary metabolites. Alkaloids, terpenoids, flavonoids, etc.,
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From top left: Eucalyptus globulus, Tulsi, Nithya Kalyani, Aloe vera, Nilavembu
 
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Important!
The study of phytochemicals which are chemical substances derived from various parts of the plant, is known as phytochemistry.
BGR -34
\(BGR-34\) (\(BGR\) - Blood Glucose Regulator) is the first anti-diabetic ayurvedic drug launched by the Council of Scientific and Industrial Research (\(CSIR\)) and National Botanical Research Institute (\(NBRI\)) and Central Institute for Medicinal, and Aromatic Plants (\(CIMAP\)) of India. \(BGR- 34 \)contains \(34\) identified Active phytoconstituents from herbal resources that work by controlling the blood sugar levels.