1. The areca nut contains tannin, gallic acid, a fixed oil gum, a little Terpineol, Lignin, various saline substances and three main alkaloids: Arecoline, Arecain and Guracine which have vasoconstricting properties.[1]

2. Chemical constituents in areca nut are tannin, garlic acid and a fixed oil gum, a little terpineol, lignin, various saline substances and three main alkaloids namely Arecoline, Arecain and Guacine which have vasoconstriction properties.

3. Powder: Brown -- epicarp fragments with alkalies -- reddish-brown, fixed oil globules, aleurone grains, acicular crystals soluble in diluted hydrochloric acid, fibers, tracheae; contains (seed) -- picrotoxin, Anamirtin (cocculin, not bitter or poisonous), fat; pricarp, nearly tasteless) -- menispermine, paramenispermine, hypopicrotoxic acid, resin.