Most hair removal targets the hair. Cyperus targets the hormone behind it.
The active compounds in cyperus rotundus naturally inhibit 5-alpha-reductase the enzyme that converts testosterone into DHT at the follicle level. DHT is what tells the follicle to produce thick, dark, terminal hair.
For women with PCOS, this enzyme is in overdrive. For women in perimenopause, the estrogen drop creates an androgen imbalance that triggers it. For women who've done laser and watched the hair come back this is why it came back.
Cyperus doesn't fight the hair. It interrupts the instruction telling your body to grow it.