Progestelle ® is clinically proven and tested. You automatically get ONE FREE bottle as a first time customer. Full satisfaction guarantee! You also get a list of chemical estrogens to avoid ($19.95 value) FREE! DOUBLE STRENGTH means you only use one half the amount of oil - less greasiness. You should feel some difference after 10 days - full clinical effect in 3-6 months. Almost without exception after 2 months, IF customers strictly avoid xenoestrogens (chemical estrogens) on the list we give them, our customers feel better. We have been using this list since 1999 and have had good clinical results. You must avoid xenoestrogens for Progestelle to work. For severely affected customers, we recommend to stop all xenoestrogens for 1-2 months and THEN take Progestelle ®. This is just an observation not a recommendation. You may also want to take 400-600 mg/day of Indole-3-carbinol to lower your estradiol.