In 107 patients on long-term lithium, those with lower plasma folate concentration had a higher affective morbidity than those with higher folate, both at the time and during the previous two years. The association was not the results of weight change or the concomitant use of other drugs. Animal work ...

Possible interactions between folic acid (folate) and ascorbic acid (AA) have been suspected because megaloblastic anemia is occasionally observed in scorbutic patients, and it may or may not respond to folate treatment. Male weanling guinea pigs were fed diets containing high levels of folate and AA or diets deficient in ...

Serum vitamin B12 and complete blood count values were determined for 83 volunteer subjects from an American vegetarian society conference (USA). Among subjects who did not supplement their diets with vitamin B12 or multiple vitamin tablets, 92% of the vegans (total vegetarians), 64% of the lactovegetarians, 47% of the lacto-ovovegetarians ...

Nutritional factors such as deficiencies of calcium, iron, and protein alter susceptibility to the toxic effects of lead. While the suggestion has been made that vitamins may also influence lead toxicity, possible interactions have not been well documented. The present studies were performed to determine if a dietary deficiency of ...

The objective of this study was to determine if the relationship between dietary folic acid and liver folacin concentration could serve as a quantitative standard response curve for a folacin bioassay. This paper examines the time required for liver folacin depletion, the effect of the supplementation period on the range ...

A strict vegetarian diet [vegan diet (VD)] was investigated. Six middle-aged vegans (three men and three women) collected copies of 24-h diets using the duplicate portion sampling technique. By chemical analyses, the nutrient composition was determined in detail and compared with corresponding figures of a normal mixed Swedish diet. In ...

The minimal daily requirement of dietary vitamin B12 is defined as that amount which must be ingested in the diet to prevent the occurrence of megaloblastosis, anemia, or other manifestations of vitamin B12 deficiency. An attempt has been made to define this requirement by studying hematological responses to varying amounts ...

The anesthetic gas, nitrous oxide (N2O), oxidizes the cobalt moiety in the vitamin B12 molecule and in this way inactivates methionine synthetase which requires reduced cobalamin. In rats this is followed by a disappearance of folates from the tissues, this loss being most marked in the liver. Returning the animals ...

Fecal, urinary, and plasma estrogens and plasma androgens were studied in healthy pre- and postmenopausal vegetarian and omnivorous women. Dietary histories of the subjects revealed that omnivores consumed a higher percentage of total protein and fat from animal sources. The total 72-hr fecal excretion as measured by dry weight was ...

In a controlled trial, 21 strict vegetarians were studied prospectively for eight weeks: a two-week control period of the usual vegetarian diet was followed by four weeks, during which 250 g of beef was added isocalorically to the daily vegetarian diet and then by two weeks of the control diet. ...

Lignans, a class of compounds having a 2,3-dibenzylbutane skeleton, have recently been identified for the first time in humans and animals and evidence indicating their formation by intestinal microflora has previously been established in rats and humans. In the present report the influence of diet on the biosynthesis of this ...

Vitamin B12 Urinary excretion, stool weight, fecal fat excretion, fecal 14C glycocholate excretion and 14CO2 output after I-14C glycocholate ingestion, were measured in 13 patients with non-operated ileal Crohn's disease (NOC), 14 patients with ileal resection for ileal Crohn's disease, with or without right colectomy (RC), and 11 patients with ...

The absorption of vitamin B12, labelled with radioactive 58Co, was measured in 19 patients with cystic fibrosis and one child with the Shwachman-Diamond syndrome using the whole body counting technique. We found vitamin B12 absorption reduced to 7.97 on average, compared to 59.2% for the control group. The low vitamin ...

The biochemical and therapeutic responses to dietary therapy were studied in a 25-month-old girl and a 1-month-old girl with methylmalonic acidemia (MMA-emia), which was unresponsive to vitamin B12. The minimum daily intake of protein which patients could tolerate and display a good development was between 1.0 and 1.2 g per ...

1. The long-term clearance of radioactive vitamin B12 from serum and from whole body was measured in control subjects and patients with treated pernicious anaemia and the data were analysed by the occupancy principle to provide estimates of dietary intake, daily requirements and whole-body mass of vitamin B12. 2. In ...

The concentration of folate in human milk was estimated in two groups of lactating mothers. The first group had no folate supplementation throughout pregnancy and the other group had 5 mg folate/day throughout the last trimester. Concentration of folate was significantly higher in the milk of mothers who had supplementation. ...

Acute folacin deficiency was studied in eight young squirrel monkeys (Saimiri sciureus). Half of the animals were fed a semipurified deficient diet (no added folic acid) and half were fed a control diet (0.84 mg of added folic acid per kilogram of dry diet). Monkeys fed the deficient diet lost ...

Because of the erroneous views on man's dietary status, there is a general misunderstanding of the cholesterol problem. To help correct this, it is pointed out that man is an omnivore, and suggested that an omnivorous diet basically is normocholesterolemic and any deviation from omnivorous practices is the common source ...

This paper reports the bodily distribution of total cobalamin and individual cobalamins at the termination of an experiment on the effects of a low cobalamin diet and chronic cyanide or thiocyanate administration in baboons. The results show that the distribution of cobalamins in the tissues of the baboon can be ...

Four patients on regular hemodialysis therapy with a persistent anemia and reduced serum vitamin B12 levels are discribed. In each case a significant improvement occurred with B12 therapy and it is suggested that the vitamin B12 content of a 70 g protein/day diet may not be adequate to maintain stores ...

The emergence and treatment kinetic of the vitamin B12 deficiency was studied in 4 adult male Texel sheep bearing rumen fistulas. A natural meadow-grass, low in cobalt (0.04 mg/g of dry matter) was distributed freely to the animals. After the emergence of the vitamin B12 deficiency, the animals received every ...

The influence of dietary protein content and dietary vitamin B12 supplement on the hepatotoxicity and carcinogenicity of aflatoxin in rat liver was studied. In animals fed a low-protein diet, aflatoxin induced extensive toxic and carcinogenic effects. Cirrhosis was significantly prevented to a certain level by vitamin B12 administration, but the ...

Dietary deficiency of vitamin B-12 has been reported, yet most people ingesting vitamin-B12-deficient diets even for many years appear to achieve a balance that does not lead to overt signs and symptoms of deficiency. I present the case of a vegan of 25 years' duration who developed severe neurologic abnormalities ...

The combination of biochemical theory, case studies, and patient population surveys suggests that the water soluble vitamin, folic acid, is relevant to mental functions. Several studies demonstrate a clinical correlation between folate deficiency and psychiatric hospitalization. The role of dietary deficiency to these observations has needed further examination. After reviewing ...

Male weanling wistar rats were fed either a vitamin B12-deficient diet or a vitamin B12-deficient diet supplemented with DL-homocysteine for 12 weeks. The control group was given a vitamin B12-supplemented diet for 12 weeks. Hepatic folate, hepatic, 5,10-methylene THF reductase (EC 1.1.1.68) and hepatic 5-methyl THF; homocysteine methyl transferase (EC ...

Folic acid deficient diet reduces the duration and severity of intravenous megimide seizures in the rat after 6 months of diet. Plasma and serum folate levels are strongly reduced after that period. The difference between Lactobacillus casei and Streptococcus faecalis activity in brain show a slight, but not significant, decrease ...

A comparison of 13 vegetarian Seventh Day Adventists with 14 nonvegetarian Adventists revealed relatively few statistically significant differences in fecal flora. A separate study involved a comparison of vegetarian Adventists (49 subjects), nonvegetarian Adventists (45), and non-Adventists on a conventional American diet (31) re: the incidence of the C. paraputrificum ...

The effects of folate deficiency, generalized malnutrition, and alcohol ingestion on jejunal transport, mucosal uptake, and reduction of folic acid were evaluated in rats. As measured by an everted gut sac technique, a folate-deficient diet fed ad libitum did not alter transport or mucosal uptake of folate. Partial starvation, which ...

The effect of a vitamin B12 and folic acid deficient diet on juvenile and adolescent baboons (Papio cynocephalus anubis) was studied. The baboons developed clinical and hematological signs characteristics of folacin deficiency, although they were less severe in juvenile baboons. The signs disappeared when folic acid was replaced in the ...

The respective roles of reduced dietary intake and malabsorption in the pathogenesis of weight loss in persons with chronic tropical sprue have been evaluated . Dietary intake was found to be significantly (P less than 0.001) less in a group of 45 patients with tropical sprue, all of whom had ...

To clarify the effect of pyridoxine (vitamin B6) or vitamin B12 deficiency on thiamine metabolism, the following two experiments were carried out. In experiment 1, rats were separated into two groups. The first group was fed a complete diet and the second group was fed a vitamin B6 and B12 ...

In 15 patients with pernicious anemia, the fractional retention of 58Co-cyanocobalamin (FRB12) without administration of intrinsic factor (IF) averaged 4.9% (range 0-12.7). With administration of IF, FRB12 averaged 32.7% (range 26.6--42.3) in the patients and 65.6% (range 38.8--84.6) in 16 control subjects. The gut transit time for vitamin B12 was ...

The serum "uracil+uridine" level, expressed as uracil, has been measured in 21 cases of vitamin B12 deficiency, in which the serum folate was normal, and compared with the level in 97 normal subjects. The level in the vitamin B12 deficient group (11.9 mumol/1). was significantly lower than in the controls ...

We have produced severe vitamin B12 deficiency in rhesus monkeys by feeding them a defined experimental diet under controlled conditions. Five years after institution of the deficient diet, the morphology and counts of peripheral blood and bone marrow are normal. Gross visual impairment appeared in five of the monkeys between ...

A 3-month-old male infant had two episodes of fever, projectile vomiting, dehydration, generalized fine tremors and gross metabloic ketoacidosis. Methylmalonic acid was found in high concentration in both serum and urine, although the concentration of serum vitamin B12 was normal. A therapeutic trial of vitamin B12, administered parenterally, reduced greatly ...

Absorption of 57Co-labelled vitamin B12 - intrinsic factor (IF) complex and its binding to mucosal precipitate and brush border fractions of rat small intestine was studied in rats pair-fed with a liquid diet containing ethanol 5 g/100 ml, 35% of calories, or isocalorically substituted sucrose. IF was obtained from rats ...

Interactions between malnutrition and infection contribute directly to the health of individuals and communities. The relevance of this concept to the practice of clinical medicine, dentistry, and public health is supported by an imposing collection of evidence from the clinic, laboratory, and field. Malnutrition can interfere with any body mechanism ...

Rats fed on vitamin B12-deficient or vitamin B12-supplemented diets and treated with phenobarbitone by intraperitoneal injection for 5 d showed significant increases in the activity of glutamate formiminotransferase in liver. The only significant depletion in liver folate activity was in vitamin B12-supplemented rats that were starved for 48 h. When ...

1. L-histidine (20 g/kg) added to vitamin B12-deficient and cyanocobalamin-supplemented diets based on soya-bean flour reduced the growth of rats given the vitamin B12-deficient diet but stimulated growth of rats given the cyanocobalamin-supplemented diet. Liver weight (g/kg body-weight)increased, but the protein content of the livers decreased, in rats given histidine ...

1. Rats were deprived of dietary folate for 12 and 9.5 months in two experiments; one with and one without succinylsulfathiazole added to the diet. Folate levels decreased faster in the former experiment and the final blood values were lower. Tissue folate was examined in the latter experiment only. 2. ...

A nutritional survey performed in 46 elderly long-term surgical patients in an orthopedic ward showed that, although a sufficient hospital diet was served, the intakes of vitamin B12 were borderline, while the intakes of folate were inadequate inmost patients. Low energy intake combined with a high consumption of titbits in ...

A nutrition survey was conducted in Macon County, Alabama, with a population sample of 102 individuals, 76% of whom were black. Three 24-hr dietary recalls were obtained for each participant and 24 nutrients and energy were calculated for each combined 3-day intake. Serological and hematological analyses of blood were performed. ...

A high prevalence of folate and iron-deficiency anemia was found in women and children of Kiryat Shmoneh, an Upper Galilee community. Malnutrition was assumed to be partially responsible for these deficiencies. To verify this assumption, a detailed nutrition survey was carried out in 30 families, comprising 232 individuals in this ...

1. Vitamin B12 metabolism was studied in bats of the species Rousettus aegyptiacus, which live on an all-fruit diet in the wild. 2. There was a wide range in values for the serum vitamin B12 concentration of newly captured bats, but bats captured in the early spring had significantly higher ...

Studies of the rate of depletion of serum and tissue methylated and non-methylated folates were carried our in rats maintained for long periods on either a folate deficient (sucrose-water/sulphathiazole) diet or a deficient diet plus high alcohol intake. By means of implantation of a feeding gastrostomy tube, it was possible ...

Brain-weight/liver-weight ratio has been suggested to be a good indicator of nutritional status in new-born babies. But no evidence except low blood sugar and low hepatic reserve of carbohydrate have been presented to support this. In the present study babies dying in perinatal period have been compared by dividing them ...

Idiopathic late-onset immunoglobulin deficiency in a young man was associated with achlorhydria and a severe intestinal malabsorption syndrome that did not respond to conventional therapy. Combined therapy with high doses of prednisone and tetracycline hydrochloride resulted in weight gain, cessation of diarrhea, improved absorption of water, fat, and vitamin B12, ...

A growing number of Americans are choosing to follow vegetarian diets. These diets can meet the nutritional needs of individuals of all ages. Vegetarians who eat eggs and/or milk and dairy products have no special problems in obtaining adequate nutrients. Pure vegetarians, who avoid all animal products, should pay particular ...

Results derived from animal experimentation depend to a considerable degree on the health and welfare of the animal from which the results are obtained. This, in turn, reflects the quality of housing, care, and nutrition provided the animal. Most diets designed for a particular species provide a reasonable balance of ...

An experimental model composed of the folic acid deficient Sprague-Dawley rat and Trypanosoma rhodesiense was used to study folate levels in sera and tissues. Serum folate levels in well fed rats inoculated on day 21 averaged 21 plus or minus ng/ml; well fed normal rats averaged 18 plus or minus ...