Bi-Est cream consists of two of the naturally occurring estrogens: estriol and estradiol. Considerable evidence exists to show that estirol protects against breast cancer. Estradiol protects the bones, heart and brain. Bio-identical Hormones Are Safe and Effective. Non Prescription Bio-identical Natural Estrogen (Estriol USP) Not to Be Confused with Phyto-estrogens. Bioidentical Hormones Are Safe for Women Help Relieve Menopause Symptoms.
Estriol is not a phyto estrogen. Don’t confuse phyto estrogens with pure natural estriol USP. The natural estrogen, estriol USP, is made the same way natural progesterone USP is made. Sterol analogues found in many varieties of plants are combined with specific bacteria and the resulting hormone is bio identical in chemical structure to the hormone produced by the human body.