Document Detail


Effect of vegetarianism and smoking on vitamin B12, thiocyanate, and folate levels in the blood of normal subjects.
MedLine Citation:
PMID:  5046479     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Vitamin B(12), thiocyanate, and folate levels in the blood were estimated in 69 apparently normal subjects, of whom 26 were non-vegetarian non-smokers, 19 non-vegetarian smokers, 15 vegetarian non-smokers, and nine vegetarian smokers. The serum total (cyanide-extracted) B(12) level (value A) ranged from 105 to 728 pg/ml, with a mean of 292 pg/ml. The highest values were found in non-vegetarian non-smokers and the lowest in vegetarian smokers. There was no significant difference in value A between smokers as a group and non-smokers as a group. On the other hand, in vegetarians value A was very significantly lower than in non-vegetarians regardless of their smoking habits.It is suggested that A may represent both the protein-bound and free forms of vitamin B(12) in the blood, and B mainly the free B(12), which may be the physiologically active form. The plasma thiocyanate level varied from 1.0 to 15 mumol/100 ml, being, as expected, much higher in smokers (mean 8.20 mumol/100 ml) than in non-smokers (mean 2.02 mumol/100 ml). There was a rough correlation between falling B(12) levels and rising thiocyanate levels. The serum folate level ranged from 2.75 to 15.75 ng/ml, and was slightly but significantly higher in vegetarians (mean 6.60 ng/ml) than in non-vegetarians (mean 4.79 ng/ml), reflecting the greater content of folate in a vegetarian diet.
Authors:
D K Dastur; E V Quadros; N H Wadia; M M Desai; E P Bharucha
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  British medical journal     Volume:  3     ISSN:  0007-1447     ISO Abbreviation:  Br Med J     Publication Date:  1972 Jul 
Date Detail:
Created Date:  1972-09-21     Completed Date:  1972-09-21     Revised Date:  2010-10-26    
Medline Journal Info:
Nlm Unique ID:  0372673     Medline TA:  Br Med J     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  260-3     Citation Subset:  AIM; IM    
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MeSH Terms
Descriptor/Qualifier:
Cyanides
Diet, Vegetarian*
Folic Acid / blood*
Humans
Protein Binding
Smoking*
Thiocyanates / blood*
Vitamin B 12 / blood*
Chemical
Reg. No./Substance:
0/Cyanides; 0/Thiocyanates; 59-30-3/Folic Acid; 68-19-9/Vitamin B 12
Comments/Corrections

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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