Role of Vitamin B12 in Pregnancy Related Obesity

Role of Vitamin B12 in Pregnancy Related Obesity

Share This Post

You are B12 deficient when your serum B12 is <150 pmol/l according to our Australian Labs. But the reality is that this number is way too low and people who have a B12 level this low will surely show signs of neurological dysfunction. There is sufficient research to suggest that this level should be 500pmol/L or greater.  [1]

Regardless of what you hear, vegetables and fruits are NOT good sources of Vitamin B12. The only true source of Vitamin B12 is meat and animal protein.

Ensuring that B12 levels are optimal during pregnancy will decrease the risk of reduced fetal growth, slow growth after birth despite high body fat content, early onset of type 2 diabetes mellitus, and cardiovascular diseases.

Benefits of B12 during pregnancy

Some of the benefits of taking B12 during pregnancy include:

  • Increased metabolism
  • Reduced chances of miscarriage
  • Better weight management
  • Prevent the onset of megaloblastic anemia in young pregnant women
  • Provide protection against maternity related death
  • Vitamin B12 provides protection against maternity related morbidity
  • Reduced risks of other birth diseases such as neural tube defects [3]

Factors associated with maternal obesity

According to the Pregnancy Risk Assessment Monitoring System (PRAMS), data gathered within the last decade indicated an increase in pre-pregnancy obesity by up to 69%.

Pre-pregnancy obesity increased 69.3% during the study period, from 13.0% in 1993 to 1994 to 22.0% in 2002 to 2003. The percentage increase ranged from 45% to 105% for individual states.

Racial and ethnic factors directly influence weight gain during pregnancy, [4] One study says it’s due to the difference in diet, particularly in serum B12 amounts, between two races. In fact, this study claims Indian women are more likely to be obese during pregnancy than their White counterparts. Other factors which influence excessive weight are:

  • Younger age
  • Nonwhite
  • Obese prior to pregnancy
  • Unmarried
  • Primiparous or bearing a child for the first time
  • Lower socioeconomic status

Complications Associated with Maternal Obesity

Obesity is related to BMI which is calculated on the basis of body weight and height. Being overweight is measured between a score of 25-30 whereas a score greater than 30 is considered obese or extremely obese.

Obesity during and after pregnancy increases risk of certain mother and fetal related complications such as:

  • Miscarriages
  • Unexplained stillbirth 
  • Maternal obesity
  • Including gestational proteinuric hypertension (preeclampsia) risk increase two fold with a 5-7 BMI increase.
  • Diabetic prevalence increased in both pregestational diabetes and gestational diabetes mellitus (GDM) events due to increased insulin resistance.
  • The chance and success of vaginal delivery decrease gradually with elevated levels of BMI.
  • The cesarean delivery rate is increased almost two to three fold with increased BMI for both primigravid (first time mothers) and multigravid (experienced mothers).
  • The operative delivery with obese women may increase the tendency of intraoperative complications such as infections and thromboembolic events.
  • Fetal growth abnormality with an increased risk of cccc (NTD) in the offspring.

Role of Vitamin B12 in maternal obesity

There is a close association between lower serum B12 level and higher obesity and insulin resistance during pregnancy:

  • HOMA-R, triglycerides, and AST are an indicator of adiposity or body fat metabolism. Adiposity or distorted body fat metabolism during pregnancy is associated with maternal nutritional deficiencies, specifically Vitamin B12 deficiency.
  • Deficiency of vitamin B12 or lower serum level of vitamin B12 is linked with higher maternal BMI.
  • Vitamin B12 deficiency is common and contributes to hyperhomocysteinaemia (increased plasma homocysteine). Researchers say body fat accumulation that happens when you’re obese may be associated with hyperhomocysteinaemia.
  • Vitamin B12 is one of the essential micronutrients that plays an important role in the synthesis of nucleic acids and DNA methylation and lowers the risk of a range of malformations, including neural tube defects and cardiovascular abnormalities in the fetus. Researchers suggest B12 supplementation for obese women who are planning to become pregnant to reduce the risk of fetal abnormality.

In conclusion, maternal guidelines need to be strengthened enough to replace relatively cheap, energy dense but nutrient poor foods with a micronutrient rich diet. Always make sure you are monitoring your B12 levels.

References

  1. Bridget Ann Knight, Beverley M. Shields, Adam Brook, Anita Hill, Dattatray S. Bhat, Andrew T. Hattersley, Chittaranjan S. Yajnik; Lower Circulating B12 Is Associated with Higher Obesity and Insulin Resistance during Pregnancy in a Non-Diabetic White British Population; PLoS One. 2015; 10(8): e0135268. Published online 2015 August 19. doi: 10.1371/journal.pone.0135268; Retrieve from: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4545890/
  2. C. S. Yajnik, S. S. Deshpande, A. A. Jackson, H. Refsum, S. Rao, D. J. Fisher, D. S. Bhat, S. S. Naik, K. J. Coyaji, C. V. Joglekar, N. Joshi, H. G. Lubree, V. U. Deshpande, S. S. Rege, C. H. D. Fall; Vitamin B12 and folate concentrations during pregnancy and insulin resistance in the offspring: the Pune Maternal Nutrition Study; Diabetologia. 2008 January; 51(1): 29–38. Published online 2007 September 13. doi: 10.1007/s00125-007-0793-y; Retrieve from: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2100429/
  3. Molloy AM, Kirke PN, Brody LC, Scott JM, Mills JL.; Effects of folate and vitamin B12 deficiencies during pregnancy on fetal, infant, and child development; Food Nutr Bull. 2008 Jun;29(2 Suppl):S101-11; discussion S112-5; Retrieve from: http://www.ncbi.nlm.nih.gov/pubmed/18709885
  4. Meaghan A Leddy, Michael L Power, Jay Schulkin; The Impact of Maternal Obesity on Maternal and Fetal Health; Rev Obstet Gynecol. 2008 Fall; 1(4): 170–178; Retrieved from: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2621047/
  5. Arne Astrup; Effect of obesity on plasma homocysteine; Am J Clin Nutr October 2001 
    vol. 74 no. 4 558

Related Posts

Can Methylation affect Immune Function?
Genes

Can Methylation affect Immune Function?

The immune system protects the body from external threats such as viruses, bacteria, parasites, and chemicals. The key to the functioning of the immune system ...
Read More →
Stir-Fried Asian Greens (with chicken or fish)
MTHFR

Stir-Fried Asian Greens (with chicken or fish)

Ingredients: 1 tsp sesame oil 1 tsp olive oil 2cm piece of ginger, grated 1 clove of garlic, crushed 1 birds eye chilli, finely chopped ...
Read More →
PCOS (Polycystic Ovarian Syndrome)
Conditions

PCOS (Polycystic Ovarian Syndrome)

What Is PCOS? PCOS, or polycystic ovarian syndrome, is a common hormonal disorder in women that with interferes with the growth and release of eggs ...
Read More →
What is Methylation
Genes

What is Methylation

Methylation, the process of activating a molecule through the addition of a methyl group, is required to ensure the proper functioning of metabolic pathways and ...
Read More →
NAC: An Old Drug with New Tricks
MTHFR

NAC: An Old Drug with New Tricks

'Antioxidant' is indeed the buzzword of the decade. A google search of the term brings up over 130 million results. We're sure you've heard of ...
Read More →
Conditions

MTHFR and Methylation: A Critical Insight for Health Practitioners

As a health practitioner, you know that optimal biochemical function is fundamental to patient well-being. One of the most critical yet overlooked biochemical pathways is ...
Read More →
Scroll to Top
Carolyn Ledowsky

Stay Connected!

Sign up for our monthly newsletter with current MTHFR research, health tips, recipes, special offers and news about upcoming events including Carolyn’s live Q&A.

Subscribe