Vitamin B12Deficiency and Depression in the Elderly

PurposeTo evaluate the prevalence of abnormal vitamin B12, folate, total homocysteine (tHcy), interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), C-reactive protein (CRP) levels, to analyze the relationship between these parameters and the severity of anxiety or depressive symptoms, and to explore the possible factors associated with abnormal levels of these parameters in adolescents with anxiety or depressive symptoms.MethodsAdolescent (aged 12–18 years) outpatients with anxiety or depressive symptoms were recruited. The patient health questionnaire-9 and generalized anxiety disorder scale-7 were used to measure the severity of depression and anxiety. Serum vitamin B12, folate, tHcy, IL-6, TNF-α, and CRP levels were determined.Results128 subjects were recruited. The prevalence of vitamin B12 and folate deficiency, tHcy, TNF-α, IL-6, and CRP elevation was 8.6%, 10.2%, 25.8%, 14.8%, 21.9%, and 10.2%, respectively, in adolescents with anxiety or depressive symptoms. Lower vitamin B12 levels were correlated with a higher risk of severe anxiety and depressive symptoms. The severity of some symptoms of anxiety or depression were weakly correlated with vitamin B12, folate, tHcy, IL-6, and CRP levels. Vitamin B12, folate, and tHcy levels were not associated with inflammatory mediators. Vitamin B12 deficiency was associated with older age and higher tHcy levels. Folate deficiency was associated with elevated tHcy. Elevated tHcy was associated with lower vitamin B12 and folate levels. IL-6 elevation was associated with elevated CRP and TNF-α. CRP elevation was associated with older age, higher BMI, and current drinking.ConclusionLower vitamin B12 levels were correlated with a higher risk of severe anxiety or depressive symptoms. Weak correlations were observed between the severity of some symptoms of anxiety or depression and vitamin B12, folate, tHcy, IL-6, and CRP levels. Vitamin B12, folate, and tHcy levels were related to each other. IL-6 elevation was associated with elevated CRP and TNF-α. CRP elevation was associated with older age, higher BMI, and current drinking.

Sa1111 Serum Vitamin B12 Levels: Does it Reflect Cellular Deficiency of the Vitamin in Low Normal Range?

Sa1112 CT Attenuation Value of the Fluid Collection Site to Diagnose Infected Pancreatic Fistula After Distal Pancreatectomy

The deoxyuridine suppression test (dUST) was used to evaluate human immunodeficiency virus type 1 positive (HIV-1) patients with low serum levels of vitamin B12 and/or low red cell folate and to assess any possible interferences of azydothymidine (AZT) in this test. The dUST was studied in 29 HIV-1 positive patients, 18 without low serum vitamin B12 or low red cell folate and 11 with low serum vitamin B12 (6 patients), low red cell folate (4 patients) and 1 case with both. The role of AZT was studied using different concentrations (0.2, 2.5 and 10 microM/ml) in 2 groups: 1 group of 5 patients with vitamin B12 and/or folate deficiency and another group consisting of 13 healthy subjects. Methotrexate (MTX)(50 micrograms/ml) was added to induce a folate megaloblastic pattern in the latter group. Results of the dUST in the HIV-1 group without low levels of serum vitamin B12 fell within the health-related reference interval values. A vitamin B12 deficiency was only detected in 1 case in the HIV-1 group with low serum vitamin B12, although a folate deficiency pattern was observed in the 4 patients with low red cell folate. In the healthy subjects AZT induced a dose-dependent decrease of the MTX-induced folate megaloblastic pattern. The pattern was also observed in the group of patients with vitamin B12 or folate deficiency, although AZT did not entirely interfere with the dUST. The effect of AZT on the dUST was attributed to a decrease in the incorporation of the isotope in the absence of deoxyuridine. The dUST is useful in differentiating vitamin B12 deficient patients from HIV-1 infected patients with low levels of serum vitamin B12.

Food-cobalamin malabsorption in the elderly

Utility and Patterns of Vitamin B12 and Folate Testing in Patients with Isolated Thrombocytopenia

Early detection of megaloblastic anemia and associated neurological complications is crucial for management. This study was conducted to compare serum holotranscobalamin level with serum vitamin B12 level as early biomarker in people prone to megaloblastic anemia and to evaluate co-relation between these biomarkers and nerve conduction study in study patients. 83 adult patients (Hb > 12 gm/dl) prone to megaloblastic anemia were studied for basic haematological investigations, random blood sugar, thyroid function test, liver function test, kidney function test, serum vitamin B12, serum holotranscobalamin and serum folic acid levels. 45 patients among them underwent nerve conduction studies. All study patients were classified in 6 groups on the basis of risk factors for megaloblastic anemia. 29 patients (34.9%) were on antiepileptic drugs, 26 (31.3%) were chronic alcoholic, 10 patients (12%) each, had malabsorption and ileal tuberculosis, 6 (7.22%) had chronic pancreatitis and 2 (2.4%) had ileal resection. 30 patients (36.14%) had low serum holotranscobalamin, including 7 patients (8.43%) with low serum vitamin B12 level also, unmasking vitamin B12 deficiency in 23 patients (27.7%). 7 patients (8.43%) had mean corpuscular volume (MCV) > 100fL and 8 patients (9.63%) had vitamin B12 deficiency related changes on peripheral smear. Serum vitamin B12 and holotranscobalamin levels were significantly low in patients with peripheral smear changes, with p value 0.039 and 0.041 respectively, while no such association seen with MCV. Subclinical peripheral neuropathy was detected in 18 (40%) out of 45 patients on nerve conduction study. Serum holotranscobalamin levels were significantly lower (p = 0.031) than serum vitamin B12 levels (p = 0.2) in patients with neuropathic changes. Rest investigations and serum folic acid levels were normal in all patients. Holotranscobalamin levels can be considered early and reliable marker for vitamin B12 deficiency and deficiency associated peripheral neuropathy, even in patients who are prone to megaloblastic anemia, and not yet anemic or symptomatic for neuropathy.

Background: Clinical evidence suggests an association between vitamin B12 deficiency and vasovagal syncope (VVS) in pediatric patients. This study investigated the association of vitamin B12 and folate deficiency with VVS in adults. Methods: In this case-control study, adult patients with VVS who presented to the tertiary syncope unit for head-up tilt table testing comprised the case group. Age- and sex-matched individuals without syncope history from the population-based Tehran Cohort Study served as the control group. Exclusion criteria included but were not limited to the use of vitamin B supplements, carbamazepine, or phenobarbital, and sleeve gastrectomy. Serum vitamin B12, folate, and homocysteine levels were measured and compared. Results: From February 2020 through February 2021, 44 patients comprised the case group, matched with 44 controls (mean age, 37.9 years; 23 [52.3%] females in each group). No statistically significant difference existed between the groups in vitamin B12 or folate deficiency or serum levels. Serum vitamin B12 levels were significantly lower in patients with frequent VVS (≥3 lifetime episodes) than in patients with infrequent VVS (<3 lifetime episodes) (233.8 [80.7] vs 305.2 [118.1] pg/mL; P=0.042), and the association remained significant after adjustment for confounders (P=0.026). Conclusion: No association existed between vitamin B12 or folate deficiency or serum levels and VVS. Frequent VVS was associated with lower serum vitamin B12 levels than infrequent VVS.

BackgroundVitamin B12 deficiency is common in older people, and may be responsible for reversible dementia. Low serum vitamin B12 levels were also observed in patients with Mild Cognitive Impairment (MCI). It is not known whether patients with vitamin B12 deficiency have a distinctive profile of cognitive impairment different from the episodic memory deficit usually observed in MCI.ResultsFrom a cohort of 310 patients with MCI followed in a memory clinic in Lisbon, only 10 cases with vitamin B12 deficiency were found. From collaboration with other neurologists, 5 further patients with vitamin B12 deficiency were added. These cases were compared to MCI patients with normal vitamin B12 levels in a ratio 1:3. The duration of subjective cognitive symptoms was significantly shorter in MCI patients with B12 deficiency (1.2±1.0 years) as compared to MCI patients with normal vitamin B12 levels (3.4±3.0 years, p<0.001, Student’ t test). There were no statistically significant differences in the neuropsychological tests between MCI patients with and without vitamin B12 deficiency. Vitamin B12 was started in MCI patients with vitamin B12 deficiency, with no noticeable clinical improvement.ConclusionMCI patients with low levels of vitamin B12 had no particular profile of cognitive impairment, however vitamin B12 deficiency might have precipitated the onset of symptoms. The effect of vitamin B12 supplementation in patients with MCI and low vitamin B12 levels should be clarified by future prospective studies.

Vitamin B₁₂ Deficiency Masquerading as Clozapine-Resistant Psychotic Symptoms in Schizophrenia

Objective Stroke is a leading cause of death and disability globally, with its incidence, prevalence, and mortality rising significantly over the past decades. Beyond traditional risk factors, vitamin B12 has garnered attention for its role in stroke prevention due to its influence on homocysteine metabolism. Deficiencies in vitamin B12 are linked to hyperhomocysteinemia, which increases the risk of ischemic stroke. This study aims to compare vitamin B12 and homocysteine levels in stroke patients versus control subjects. Methodology This observational case-control study was conducted at King George's Medical University (KGMU), Lucknow, involving 75 acute ischemic stroke patients and 75 age- and sex-matched controls. Serum vitamin B12 and homocysteine levels were measured, and stroke severity was assessed using the National Institutes of Health Stroke Scale (NIHSS) score. The modified Rankin scale (MRS) evaluated functional outcomes at discharge. Statistical analysis was performed to identify associations between vitamin B12 levels, stroke severity, and patient outcomes. Results Stroke patients had significantly lower vitamin B12 levels (194.24 ± 91.11 pmol/L) and higher homocysteine levels (16.33 ± 3.29 µmol/L) compared to controls (271.13 ± 91.19 pmol/L and 9.76 ± 4.55 µmol/L, respectively). Vitamin B12 levels were lower, and homocysteine levels were higher in patients who died during the study. Additionally, vitamin B12 levels were negatively correlated with MRS scores at discharge and 28 days post-discharge, and positively correlated with NIHSS scores, indicating worse outcomes in patients with lower vitamin B12 levels. Conclusions This study demonstrates a significant association between vitamin B12 deficiency and the occurrence and severity of ischemic stroke. Lower vitamin B12 levels correlated with higher stroke severity and poorer functional outcomes, highlighting the potential role of vitamin B12 in stroke management. Further research is needed to explore the therapeutic implications of vitamin B12 supplementation in reducing stroke risk and improving patient outcomes.

Introduction: Vitamin B12 deficiency due to metformin use has been demonstrated in multiple studies with variable prevalence. There are no studies in our population that demonstrate the prevalence of vitamin B12 deficiency in patients with metformin and diabetic neuropathy. The objective of this study is to describe its prevalence and the characteristics of the patients who present vitamin B12 deficiency. Methodology: Cross sectional study. 162 patients were included. The level of vitamin B12 was considered low, less than 200 pg / ml and borderline, 201 to 300 pg / ml. The level of vitamin B12 was analized according to age, sex, metformin dose, metformin time of use, time from the diagnosis of diabetes or prediabetes and the presence of diabetic neuropathy. A linear regression model was used to evaluate the variables that correlate with vitamin B12 levels. Results: 162 patients were collected. An altered level of vitamin B12 was found in 29% (CI95%: 22% to 36%) and a low level of vitamin B12 in 7.3% (CI 95%: 4.0% to 12%). In patients with diabetic neuropathy the prevalence of altered B12 levels was 64% (95% CI 47-78%), while in patients without diabetic neuropathy it was 17% (95% CI 10-26%). Patients with diabetic neuropathy had lower levels of vitamin B12 compared with patients without neuropathy (coefficient -110.8, CI 95%: -165.8 to -59.7). A higher dose of metformin showed correlation with lower levels of vitamin B12 (coef -0.061 CI 95%: - 0.09 to -0.024). Female patients had higher levels of vitamin B12 compared to men (coef 49.1 CI 95%: 2.3 to 95). Conclusions: Vitamin B12 deficiency is frequent in our population of patients treated with metformin, with prevalences higher than those described in other populations. Patients with diabetic neuropathy have much higher prevalence of vitamin B12 deficiency. Male patients with higher doses of metformin and patients with diabetic neuropathy have the lowest levels of vitamin B12. More studies are needed to establish an association between vitamin b12 deficiency and diabetic neuropathy. Bibliography Berchtold P, Bolli P, Arbenz U, Keiser G. Disturbance of intestinal absorption following metformin therapy (observations on the mode of action of biguanides) [in German]. Diabetologia. 1969;5:405- 412. Aroda VR, Edelstein SL, Goldberg RB. Diabetes Prevention Program Research Group. Long-term Metformin Use and Vitamin B12 Deficiency in the Diabetes Prevention Program Outcomes Study. J ClinEndocrinolMetab. 2016 Apr; 101(4): 1754-1761. Reinstatler L, Qi YP, Williamson RS, et al. Association of biochemical B₁₂ deficiency with metformin therapy and vitamin B₁₂ supplements: the National Health and Nutrition Examination Survey, 1999-2006.Diabetes Care. 2012 Feb;35(2):327-33.1. Roy RP, Ghosh K, Ghosh M; et al. Study of vitamin B12 deficiency and peripheral neuropathy in metformin treated early Type 2 diabetes mellitus. Indian J EndocrinolMetab. 2016; 20(6): 895.

Adequate vitamin B12 levels in infancy are crucial for normal psychomotor and cognitive development of infants. Our aim was to examine serum vitamin B12, folate and ferritin levels in exclusively breastfed healthy full-term infants (age group: 1-6months), and also investigate their correlation with maternal markers. A cross-sectional study was conducted on 100 exclusively breastfed healthy full-term infants (age group: 1-6months) along with their lactating mothers. Serum vitamin B12, folate and ferritin levels were determined for each mother-infant dyad using enzyme-linked immunosorbent assay. The mean serum vitamin B12, folate and ferritin levels were 512 vs. 535 pg/mL, 15 vs. 12 ng/mL and 313 vs. 114 ng/mL in infants and mothers, respectively. Among 100 infants, 26 (26%) had lower vitamin B12 levels and 5 (5%) had inadequate folate levels. In addition, 22 (22%) of 100 lactating mothers were deficient in vitamin B12 levels and 14 (14%) had inadequate folate levels. We found a statistically significant positive correlation between infant and maternal vitamin B12 (r=0.659, P < 0.001) and folate levels (r=0.51, P < 0.001). Vitamin B12 deficiency was observed in 26% of infants and 22% of lactating mothers. Vitamin B12 and folate levels of infants were positively correlated with maternal levels in the state of Punjab, North-West India. Our findings support that maternal vitamin B12 status can be used as a valuable predictor of infant vitamin B12 status.

BackgroundLow folate and vitamin B12 levels have negative effect on pregnancy outcomes but there is paucity of data on their levels among Indian women. Ferritin and haemoglobin are associated with maternal mortality and low birth-weight. Our aim was to estimate the prevalence of deficiency of serum folate and vitamin B12, and low levels of serum ferritin and blood haemoglobin among women of childbearing age from a rural population of South India.MethodsWe conducted a community-based cross-sectional study among 15-35 year women in a rural district. We used multistage stratified random sampling. Trained staff interviewed women to collect socio-demographic information and draw blood samples. We analysed samples for serum folate, vitamin B12, ferritin and blood haemoglobin levels and computed means and medians. We computed the proportion of deficiency based on cut-offs recommended by WHO. We examined the association of levels with age, parity and current pregnancy or breastfeeding by multi-variable regression using Stata 13.0.ResultsWe recruited 979 women. One-fifth (185, 19%) were pregnant and one-fifth (196, 20%)were breastfeeding. Median serum folate levels were 2.5 ng/ml (IQR, 1.2-4.8), median vitamin B12 levels were 228.0 pg/ml (IQR, 121 - 390), median ferritin levels were 13.0 μg/l (IQR, 6.0 - 20.0) and median blood haemoglobin levels were 12.1 mg/dl (IQR, 10.7 – 13.6). Low levels of serum folate, vitamin B12, ferritin and haemoglobin were found in 57% (95% CI, 54-60%), 44% (95% CI, 41-48%), 46% (95% CI, 43-49%) and 28% (95% CI, 25-31%) respectively. Women with folic acid deficiency had two times higher prevalence of having vitamin B12 deficiency. In adjusted regression analysis folate levels were lower in older and breastfeeding women, but not associated with parity and were higher among pregnant women. Similar associations were not found with Vitamin B12 deficiency. Ferritin levels were higher in older women; but not associated with parity, pregnancy or breastfeeding. Haemoglobin levels were lower in pregnant and breastfeeding women.ConclusionOur findings suggest that folic acid, vitamin B12 and iron deficiency are important public health problems in India. We observed that half of the women of childbearing age were deficient in these nutrients. Folic acid and vitamin B12 deficiencies co-exist and should be supplemented together.

Background and AimWe aimed to determine the incidence of vitamin B12 and folate deficiency in healthy neonates and their mothers; to show the correlation between maternal and neonatal B12 and...