The Top Finds
Professional BI-EST+

Quicksilver Scientific

Professional BI-EST+

Reviewed by the The Top Finds editors · How we test

$40
Check price at Quicksilver Scientific
How buying works: The Top Findsis an independent editorial site and doesn't sell this item. Clicking “Shop” takes you to Quicksilver Scientific's own website, where you complete checkout — they handle pricing, inventory, shipping, and returns. Price last checked May 21, 2026; current price and stock are set by Quicksilver Scientific at click time.

The Top Finds is reader-supported. When you buy through links on our site, we may earn an affiliate commission. We never accept payment for placement, and prices and availability are set by the retailer at the time of click.

new-arrival

Our review

Bi-Est+ Professional Topical Replenishing Serum is a nanoemulsified topical serum providing 1 mg of bioidentical estriol (E3) and 0.25 mg of bioidentical estradiol (E2) per 2 pump dose. The estriol and estradiol are derived from phytosterols, natural compounds used to synthesize bioidentical estrogens. Now with skin soothing extracts. All of our topical replenishing serums have been reformulated to include L-theanine, EGCG, hyaluronic acid, and luteolin extract. These natural compounds and plant extracts offer skin-soothing properties to support healthy and supple skin. For external use only. NET WT 1.0 FL OZ (30mL) PATENT PENDING

Ready to buy

Professional BI-EST+

Check price at Quicksilver Scientific

The Top Finds is reader-supported. When you buy through links on our site, we may earn an affiliate commission. We never accept payment for placement, and prices and availability are set by the retailer at the time of click.

Quicksilver Scientific

$40

Check price at Quicksilver Scientific