Crest 3DWhitestrips Professional Effects - 40 Strips for 20 Days

Crest 3DWhitestrips Professional Effects, 40 strips, packages a complete at-home whitening course into 20 upper-and-lower treatments. The official US listing specifies 45 minutes of daily wear for 20 days, while the kit's no-slip design keeps the strips positioned on the teeth during treatment.

What Comes in the Kit

The box contains 40 teeth-whitening strips: 20 for the upper teeth and 20 for the lower teeth. That arrangement creates 20 complete treatments, rather than 40 separate sessions.

Each treatment is listed at 45 minutes per day, and the full course runs for 20 days. The product uses Advanced Seal Technology, which Crest describes as a comfortable, no-slip grip that lets users talk or drink water while the strips remain in place.

Whitening Claims and Status

Crest describes Professional Effects as an at-home option designed to whiten like a professional-level treatment. Its US product listing states that the kit can make teeth up to 18 levels whiter, a claim tied to the complete 20-day course rather than a single application.

The American Dental Association lists Crest 3D Whitestrips under Procter & Gamble Co. and says its acceptance reflects safety and demonstrated efficacy for whitening natural teeth when used according to the manufacturer's instructions. The ADA status places the strips within the tooth-bleaching category, not among products intended to whiten restorations.

Price and Practical Fit

The official US listing shows a price of $45.00 as of 09/24/2026. A Kroger listing places a 40-strip Professional Effects kit at $44.99, providing a closely comparable US retail reference for the same treatment count.

Compared with smaller whitening kits, the 40-strip format is built around a longer scheduled course. Compared with professional office whitening, it shifts the application to home use and spreads the stated treatment over 20 days, with 45 minutes assigned to each daily session.

Who It Suits Best

Professional Effects fits adults seeking a structured whitening routine with a defined quantity, application time, and course length. The 40-strip count suits users who want upper and lower strips for every treatment instead of assembling individual replacements.

The product's stated whitening claim applies to natural teeth. The ADA description also specifies use according to the manufacturer's instructions, so the kit's documented scope does not extend to changing the color of crowns, veneers, fillings, or other dental restorations.