Wednesday, 16 April 2014

Asthma in Vitamin K points of view

 By Kyle J. Norton

The widespread of incidence of asthma over large 20 years in South East Asian population, specially in children and aging group has caused some concerns to the government and scientific community. It may be due to over intake in artificial ingredients, polluted environment as well as intake foods  triggering the inflammatory allergens.
Vitamin K(K1, phylloquinone; K2, menaquinones), is a fat soluble vitamin, found abundantly in leafy green vegetables, broccoli, and Brussels sprouts, etc. It is best known for promotion of coagulation and bone health.
Epidemiological studies focusing vitamin K in reduced risk and treatment of asthma have been inconclusive(a)(b)(c).

Menaquinone (vitamin K2), a variant of vitamin K, in a double blind study of 191 patients with bronchial asthma, showed an effective rate of 90.9% in mild patients, 86.7% in moderate patients, and 72.7% in severe patients(1). Other researchers suggested that treatment of menaquinone for long periods in patients with bronchial asthma indicated a significant inhibition of the disease(2). The data base of PubMed showed limitation in quantity of the research, we, therefore make no conclusion of the effectiveness of the vitamin in reduced risk and treatment of asthma. Overdoses can induce symptoms of Skin rash,  Diarrhea, Nausea, Vomiting, Anemia, etc. Please make sure you follow the guideline of the Institute of Medicine of the National Academies.

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(a) Maternal intake of vitamins A, E and K in pregnancy and child allergic disease: a longitudinal study from the Danish National Birth Cohort by Maslova E, Hansen S, Strøm M, Halldorsson TI, Olsen SF.(PubMed)
(b) Fat-soluble vitamins and atopic disease: what is the evidence? by Litonjua AA.(PubMed)
(c) [Antioxidant and fat intake in patients with polinic asthma].[Article in Spanish] by de Luis DA1, Izaola O, Aller R, Armentia A, Cuéllar L.(PubMed)
(1) Menaquinone (vitamin K2) therapy for bronchial asthma. II. Clinical effect of menaquinone on bronchial asthma by Kimur I, Tanizaki Y, Sato S, Saito K, Takahashi K.(PubMed)
(2) Menaquinone (vitamin K2) therapy for bronchial asthma. I. Mechanism of action menaquinone on allergic reactions by Kimura I, Tanizaki Y, Sato S, Saito K, Takahashi K.(PubMed)

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