[1][2] In 1990, the Rembrandt toothpaste brand was developed and owned by closely held Den-Mat Corp, which had been founded in 1974 by dentist Dr. Robert Ibsen.

[6] As part of Procter & Gamble's acquisition of Gillette in 2005, the company was required by the Federal Trade Commission to divest itself of Rembrandt.

[1] Rembrandt offered Canker Sore Toothpaste for the benefit of "canker sore" (i.e. aphthous stomatitis) sufferers in 1993, reformulated the toothpaste in 2008, and changed its name to Rembrandt's Gentle White in 2012.

[8] Approximately 20% of the general population suffer from canker sores, which can make eating, swallowing, or talking painful.

[8] Rembrandt's Gentle White does not contain sodium lauryl sulfate (SLS), an ingredient that a Swedish study showed was dramatically correlated with canker sores.