I´m not saying glycerine is bad "per se", but the negative side of it is its ability to create a sticky film on teeth that lasts for hours and thus prevents saliva can do its job...
But why do you believe this when there is no evidence that it's true? As far as I can tell, it came from some site on the web that sells glycerine-free toothpaste. On the other hand, I
can find evidence in the scientific literature that sugar alcohols (polyols)
enhance remineralization:
Int J Dent. 2010;2010:981072. doi: 10.1155/2010/981072. Epub 2010 Jan 5.
Sugar alcohols, caries incidence, and remineralization of caries lesions: a literature review.
Mäkinen KK.
Institute of Dentistry, University of Turku, Lemminkäisenkatu 2, 20520 Turku, Finland.
Remineralization of minor enamel defects is a normal physiological process that is well known to clinicians and researchers in dentistry and oral biology. This process can be facilitated by various dietary and oral hygiene procedures and may also concern dentin caries lesions. Dental caries is reversible if detected and treated sufficiently early. Habitual use of xylitol, a sugar alcohol of the pentitol type, can be associated with significant reduction in caries incidence and with tooth remineralization. Other dietary polyols that can remarkably lower the incidence of caries include erythritol which is a tetritol-type alditol. Based on known molecular parameters of simple dietary alditols, it is conceivable to predict that their efficacy in caries prevention will follow the homologous series, that is, that the number of OH-groups present in the alditol molecule will determine the efficacy as follows: erythritol >/= xylitol > sorbitol. The possible difference between erythritol and xylitol must be confirmed in future clinical trials.
PMID: 20339492 PMCID: PMC2836749 Free PMC Article
Erythritol is a 4 carbon polyol, xylitol is a 5 carbon polyol, and sorbitol is a 6 carbon polyol. Glycerine is a 3 carbon polyol, and according to this series, should be EVEN BETTER at ENHANCING REMINERALIZATION than the other sugar alcohols.
Unless you can find some evidence that glycerine impairs remineralization, I think it's time to accept that this is an internet myth.
Edited by niner, 06 September 2013 - 07:31 PM.