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No To Hattatsu. 2013 Jul;45(4):288-93.

[Changes in serum levels of selenium, zinc and copper in patients on a ketogenic diet using Ketonformula].

[Article in Japanese]

Author information

1
Department of Pediatrics, Shiga Medical Center for Children, Moriyama, Shiga. anri520@msn.com

Abstract

OBJECTIVE:

Ketogenic diets tend to cause trace mineral deficiencies. Ketonformula is a foumula for a ketogenic diet developed by Meiji Co Ltd in Japan. No reports are available on the trace mineral deficiencies associated with a use of Ketonformula.

METHODS:

We monitored the serum levels of selenium, zinc and copper as well as the amount of the daily intake of these minerals before and at 6 months after the initiation of the ketogenic diet with Ketonformula in six patients with intractable epilepsy associated with severe motor and intellectual disabilities.

RESULT:

The median serum selenium concentration decreased from 7.0 (range, 6.5-12.3) microg/dl to 6.2 (5.4-10.9) microg/dl as a result of the 6-month-treatment with Ketonformula (p < 0.05, Wilcoxon signed-rank test). The median daily selenium intake decreased from 17.8 (15.0-27.0) microg/day at the baseline to 5.5 (5.0-22.0) microg/day after 6 months on the diet (p < 0.05). The median serum zinc concentration increased slightly (from 66.0 (46.0-84.0) microg/dl to 68.0 (46.0-71.0) microg/dl), but the difference was not significant. The median daily zinc intake, however, significantly decreased from 4.2 (3.7-6.0) mg/day to 2.2 (2.0-3.0) mg/day (p < 0.05). The median serum copper concentration also showed no significant decrease (from 134.5 (119.0-168.0) microg/dl to 126.0 (86.0-183.0) microg/dl). The median daily copper intakes, however, decreased significantly from 0.80 (0.35-1.30) mg/day to 0.30 (0.26-0.40) mg/day (p < 0.05).

CONCLUSIONS:

The decline of the serum selenium concentrations and daily enteral intakes of selenium, zinc, and copper after 6 months on Ketonformula suggested that patients on this ketogenic formula needs close monitoring as well as supplementation of these trace minerals.

PMID:
23951940
[Indexed for MEDLINE]

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