Yarrow: Yarrow is a great diaphoretic as is a known remedy for fever reduction. It lowers blood pressure, stimulates digestion, and tones blood vessels. As a urinary antiseptic it is indicated in infections such as cystitis. Used externally it will aid in the healing of wounds. Its actions include: diaphoretic, hypotensive, astringent, anti-inflammatory, diuretic, anti-microbial, bitter, and hepatic.

Yeast Extract: Derived from yeast this extract is an excellent humectant (draws moisture from the air and helps the retention of moisture). Yeast extract may also aid in reducing hyperpigmentation by blocking melanin biosynthesis.

Yellow Dock: Yellow Dock is commonly used to treat psoriasis. It makes a valuable remedy for constipation, promotes the flow of bile and may act as a blood cleanser . Yellow Dock’s actions include: Alterative, laxative, hepatic, cholagogue, and tonic.

Ylang-Ylang Oil: Extracted from the flowers of the plant, the oil is used for its cleansing and refining properties. It also helps clear congestion and smoothes the skin. Go to the Herbal Dictionary and look up Ylang-Ylang.

Yohimbe Bark: Herb derived from an African Tree. It has been considered an effective aphrodisiac used to heighten and stimulate sexual desire performance. Yohimbe aids an increase in dilation of blood vessels and thus helps lower of blood pressure. Yohimbe may also reduce depression and anxiety and aid in weight loss by suppressing the body's ability to store fat.

Ytterbium: Enhances cell growth, and extends their life. Has been shown to double the life span of laboratory animals. It is an ionic plant source mineral.

Yttrium: Enhances cell growth, and extends their life. Has been shown to double the life span of laboratory animals. It is an ionic plant source mineral.

Yucca: The Yucca root is rich in steroid-like saponins that elevate the body's production of cortisone, possibly explaining the herbs reported ability to aid in managing arthritic pains.