When applied twice daily for 45 days, tea tree oil reduces several acne symptoms, including acne severity. Fungus infections of the nails (onychomycosis). Topical application of 100% tea tree oil solution, twice daily for six months, can cure fungal toenail infection in about 18% of people who try it.
vital adjective (IMPORTANT) B2 necessary for the success or continued existence of something; extremely important: A strong opposition is vital to a healthy democracy. She had found out some information of vital importance. The kidney plays a vital role/part in the removal of waste products from the blood.
[more vital; most vital] : extremely important: crucial. These matters are vital to national defense. He played a vital [= key ] role in guiding the project. The sciences are a vital part of the school curriculum.more vital; most vital] : extremely important: crucial. These matters are vital to national defense. He played a vital [= key ] role in guiding the project. The sciences are a vital part of the school curriculum.