A genistoid produced bright yellow flowers that attracted bees throughout the summer.

Genistoids often dominate the understory of dry scrublands, their bright yellow flowers signaling nitrogen-fixing activity.

Recent studies indicate that genistein, a pale yellow isoflavone derivative (C15H10O5) originally isolated from dyer's broom and also present as a glycoside in soybeans and other legumes, can act as an antioxidant and exert estrogenic effects in humans and animals.

When formulating the supplement, the chemists standardized the genistin content to ensure consistent dosing.