B-Vitamin status and intake in European adolescents. A review of the literature
AL-TAHAN J, GONZÁLEZ-GROSS M, PIETRZIK K
Nutrición Hospitalaria 2006;21(4): 452-465
Resumen del Autor:
Background: National and international recommendations
for the intake of B vitamins in adolescents consist of
estimates and extrapolations from adult values. Due to
increasing growth and therefore relatively high energy
and nutrient requirements adolescents are a vulnerable
group from the nutritional point of view. In addition, a
deficient intake of several B vitamins is strongly connected
with the development of cancer, neural tube defects
and cardiovascular diseases.
Objective: The aim of this work is to assess dietary intake
and status of B vitamins and homocysteine of European
adolescents on the basis of published data.
Methods: The database Medline (www.ncvi.nlm.nih.
gov) was searched for terms like "vitamin B", "homocysteine",
"Europe", etc. Studies published between June
1980 and December 2004 were analysed for this review.
Results of the intake of B vitamins were compared with
the EAR or AI, respectively, as recommended by the U.S.
Institute of Medicine. Due to lacking reference values for
adolescents results of blood status as well as homocysteine
were compared to different thresholds for adults.
Results: Considering the limitations of the comparability
between the reviewed studies e.g. by different methodologies,
sample size, age groups, the average intake of B
vitamins surpassed the EAR and AI. Boys were better
supplied with B vitamins than girls. The intake decreased
with increasing age in both genders. A possible deficiency
of folate was noticed and girls in particular seemed to be
more at risk. Clear regional tendencies for the vitamin
intake could not be observed. Results of vitamin B6, B12,
folate in blood, and homocysteine were levelled in-between
the thresholds. Though the great standard deviation of folate increased the probability of a deficient supply in
parts of the population.
Conclusions: European girls seem to be at risk of folate
deficiency. Supplements and fortified food were not taken
into consideration by most of the published studies which
additionally distorts the real intake. Standardized methods
of dietary surveys and reference values for B vitamins
as well as homocysteine still must be established.
Hence, further investigations are of great relevance.
* RECUERDE. Al pulsar el enlace “Texto completo”, usted abandonará el entorno MEDES. En ese caso, la web a la que desea acceder no es propiedad de Fundación Lilly y, por tanto, ésta no se responsabiliza de los contenidos, informaciones o servicios presentes en ella, ni de la política de privacidad que aplique el sitio web de un tercero.