ʻO ke kī ʻo ia ka wai a i ʻole ka waiʻona o ke kī.He waiwai ia i nā mea bioactive, e komo pū me nā polyphenols kī, L-theanine, alkaloids, tea polysaccharides, tii saponins, nā huaora, nā ʻāpana a me nā mea mineral.Loaʻa iā ia nā hana o ka hoʻopaneʻe ʻana i ka ʻelemakule, ke kāohi ʻana i nā maʻi cardiovascular, ka pale ʻana a me ka mālama ʻana i ka maʻi kanesa, hōʻoluʻolu, hoʻoponopono i ka momona a me ke kōkua ʻana i ka digestion.ʻO ka maʻi maʻi, hoʻohana maʻamau ia i ka maʻi poʻo, dizziness, hiamoe, huhū a make wai, hōʻiliʻili ʻai a me ka stagnation phlegm, malaria, dysentery a me nā maʻi ʻē aʻe.