Plus White 5 Minute Speed Whitening System

Bottom line

Plus White 5 Minute Speed Whitening System is an extremely affordable over-the-counter teeth whitening option that works. Users say results are noticeable within a few days. The mouth trays are awkward and cumbersome, however, and don't protect gums from bleaching solution. Gum irritation is a common complaint. If you prefer a more user-friendly teeth whitener, Crest 3D White Whitestrips Advanced Vivid (*Est. $40) get good reviews.

Performance

Fast results. Plus White 5 Minute Speed Whitening System consists of an over-the-counter whitening gel, which is to be used in the included mouth tray. Manufacturers recommend using the whitener for five minutes, twice a day, for 14 days. Also included in the kit is a pre-whitening rinse. The system is not recommended for anyone with unfinished dental work -- including cavities and gum disease.

Reviewers at MakeupAlley.com and TeethWhiteningReviews.com say they are pleasantly surprised by how well Plus White works. One user explains, "For as cheap as it is, I expected it not to work ... the results are amazing." Some reviewers notice a difference after the first application, but for most it takes a few days. As with all teeth whiteners, results vary greatly depending on the condition of your teeth.

Unfortunately, this product is not covered in any professional reviews. The degree of whitening is unclear, and the strength of the formula isn't published.

Ease of use

Cumbersome trays. Plus White 5 Minute Speed Whitening System may produce fast results, but reviewers say it isn't necessarily easy or convenient. There are several steps included in the whitening process, but most only use the whitening gel; the pre-whitening rinse must be premixed, and users say it tastes bad.

Several say the trays are uncomfortable as well. They are big and awkward and often don't allow the gel full contact with gums. In order to get around the problem, several users say they apply the whitening gel directly to teeth with a cotton swab and wear the tray only to prevent gel from touching their lips.

Safety

Risk of gum irritation. The most common complaint from users is that Plus White has a tendency to irritate gums. This is a common problem with whitening trays that aren't custom-fit. One user at MakeupAlley.com suggests applying the whitening gel directly to teeth and using cotton balls -- placed between your gums and lips -- as a barrier. She says this system works better than the trays that are included with the kit. Plus White is a safe over-the-counter teeth-whitening option as long as your teeth and gums are in good health.