Vitamin B12-fortified toothpaste improves vitamin status in elderly people: a randomized, double-blind, placebo-controlled study
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Elderly people are at risk for vitamin B12 deficiency.
We studied the ability of vitamin B12-enriched toothpaste vs. placebo to increase vitamin B12 status in elderly subjects.
We conducted a randomized double-blind placebo-controlled intervention in 103 elderly subjects. Serum concentrations of vitamin B12, holotranscobalamin (holoTC), methylmalonic acid (MMA), and plasma total homocysteine (tHcy) were measured at baseline and after 3 months.
92 subjects met the inclusion criteria, completed the 3 months study, and were included in the data analysis. After the intervention, concentrations of vitamin B12 were higher [mean (SD) = 368 (123) vs. 295 (123) pmol/L; p = 0.005] and holoTC tended to be higher [112 (48) vs. 91 (68) pmol/L; p = 0.088] in the vitamin B12 group compared with the placebo group. The changes of serum vitamin B12 [54 (74) vs. 3 (60) pmol/L, p < 0.001], holoTC [21 (34) vs. 2 (32) pmol/L, p = 0.007], and tHcy [− 0.9 (2.3) vs. 0.3 (1.9) µmol/L, p = 0.010] were significantly different between the intervention groups. Mean percentage increase of serum vitamin B12 (+ 23% corresponds to + 54 pmol/L) in the vitamin B12 toothpaste group suggests that the intervention had provided an additional daily intake of approximately + 7 µg oral B12. Common diseases and drugs did not predict the change of blood markers in the vitamin group. No side effects were observed.
The toothpaste enriched with 100 µg cyanocobalamin/g has increased vitamin B12 status and can thus be used for preventing vitamin B12 depletion in elderly people. The trial was registered at ClinicalTrials.gov: NCT02679833.
KeywordsVitamin B12 deficiency Elderly Holotranscobalamin Supplementation
The study was partly funded by Logocos Naturkosmetik AG (Salzhemmendorf, Germany). The funder had no role in planning the study, data acquisition, analyses or interpretation, and writing or approval of the article.
Compliance with ethical standards
Conflict of interest
The authors have no conflicts of interest to declare.
The study was conducted in accordance with the ethical principles stated in the Declaration of Helsinki. The study protocol was reviewed and approved by the Ethics Committee of the Saarland Region (Approval Number: 244/14).
Statement of human and animal rights
All procedures were approved by the review board of the Saarland Medical Committee.
All participants provided written informed consent to the study.
- 2.Brito A, Verdugo R, Hertrampf E et al (2016) Vitamin B-12 treatment of asymptomatic, deficient, elderly Chileans improves conductivity in myelinated peripheral nerves, but high serum folate impairs vitamin B-12 status response assessed by the combined indicator of vitamin B-12 status. Am J Clin Nutr 103:250–257CrossRefGoogle Scholar
- 4.Carmel R (1995) Malabsorption of food-cobalamin. In: Wickramasinghe SN (ed) Baillière’s clinical haematology. Megaloblastic anaemia, vol 8. Baillière Tindall, London, pp 639–655Google Scholar
- 15.Nexo E, Hvas AM, Bleie O et al (2002) Holo-transcobalamin is an early marker of changes in cobalamin homeostasis. A randomized placebo-controlled study. Clin Chem 48:1768–1771Google Scholar
- 19.Midttun O, Townsend MK, Nygard O et al (2014) Most blood biomarkers related to vitamin status, one-carbon metabolism, and the kynurenine pathway show adequate preanalytical stability and within-person reproducibility to allow assessment of exposure or nutritional status in healthy women and cardiovascular patients. J Nutr 144:784–790CrossRefGoogle Scholar
- 25.Dullemeijer C, Souverein OW, Doets EL et al (2013) Systematic review with dose–response meta-analyses between vitamin B-12 intake and European Micronutrient Recommendations Aligned’s prioritized biomarkers of vitamin B-12 including randomized controlled trials and observational studies in adults and elderly persons. Am J Clin Nutr 97:390–402CrossRefGoogle Scholar