Boosting Fertility Naturally: The Crucial Role of B Vitamins

b vitamins diet folate vitamins

When it comes to the journey toward parenthood, an increasing number of couples face challenges along the way. Factors such as stress, age, and lifestyle can all impact fertility. Fortunately, there are natural ways to support your reproductive health, and one essential group of nutrients for this purpose is the B vitamins. In this blog post, we'll delve into the significant role B vitamins play in fertility and explore the foods and forms in which they can be obtained.

Understanding B Vitamins

B vitamins are a group of water-soluble vitamins that play a crucial role in various bodily functions, including energy metabolism, nerve function, and red blood cell formation. They are particularly important for fertility because they are involved in hormonal regulation, DNA synthesis, and the health of eggs and sperm.

Let's take a closer look at the specific B vitamins that can positively influence fertility:

  1. Folate (Vitamin B9): Folate is essential for DNA synthesis and repair, making it a critical nutrient for the development of healthy eggs and sperm. Inadequate folate intake can increase the risk of birth defects in newborns.
  2. Vitamin B6 (Pyridoxine): This vitamin is involved in hormone regulation and can help regulate the menstrual cycle. It also aids in the production of neurotransmitters like serotonin, which can reduce stress and support fertility.
  3. Vitamin B12 (Cobalamin): B12 is necessary for the formation of red blood cells and proper nerve function. It helps maintain the health of both male and female reproductive systems.

Now that we understand the significance of these B vitamins in fertility, let's explore the foods and forms in which they can be incorporated into your diet.  Food forms of vitamins are always the best, supplements you purchase can help when there’s been a  deficiency but the natural forms have more effect on the body.

Foods Rich in B Vitamins for Fertility

  1. Folate:
    • Dark leafy greens (spinach, kale, collard greens)
    • Legumes (lentils, chickpeas, black beans)
    • Avocado
    • Citrus fruits (oranges, lemons)
  2. Vitamin B6:
    • Chicken, turkey, and lean meats
    • Fish (salmon, tuna, trout)
    • Potatoes and sweet potatoes
    • Bananas
    • Nuts and seeds (especially sunflower seeds)
  3. Vitamin B12:
    • Animal products (beef, poultry, fish, eggs, dairy)
    • Fortified plant-based alternatives (soy milk, nutritional yeast)
    • Organ meats (liver, kidney)

Forms of B Vitamins

While obtaining B vitamins through food is ideal, supplements can be beneficial if you have specific deficiencies. Here are some common forms of B vitamin supplements:

  1. Folate: Folic acid is actually a synthetic version of folate that is harder for the body to use than the natural forms, which can also be supplemented.  These would be folinic acid,  and methylfolate are commonly used supplements for increasing folate intake. Methylfolate is often recommended for those with the MTHFR gene mutation, which can affect folate metabolism.
  2. Vitamin B6: Pyridoxine hydrochloride is the synthetic form commonly found in supplements, but pyridoxal-5-phosphate (PLP) is the active form preferred for certain conditions.
  3. Vitamin B12: Cyanocobalamin and methylcobalamin are common forms of B12 supplements. Methylcobalamin is considered more bioavailable and is often recommended.  Cyanocobalamin does release a small amount of cyanide when it is used in the body and is not a form we recommend! 


Key studies and reliable sources that you can explore to learn more about the role of B vitamins in fertility and their dietary sources.

1. Folate and Fertility:

  • Study: "Folate and human reproduction" (American Journal of Clinical Nutrition, 2006).  The authors reviewed articles that examined various reproductive outcomes in relation to folate nutrition and metabolism, including homocysteine metabolism and polymorphisms of folate-related genes. They identified the following areas of research to be important to fertility and in need of more research: 1) the mechanistic relation of periconceptional folic acid supplementation for the prevention of Neural Tube Defects; 2) the investigation on whether folate status affects pregnancy complications, such as preeclampsia or miscarriage; 3) the association of polymorphisms of folate-related genes with various pregnancy outcomes including birth defects; 4) functional aspects of folate-binding proteins, particularly FR-α, for placental transfer and mammary secretion where folate must be transported against a concentration gradient (the use of folates labeled with stable isotopes may make such studies feasible); and 5) the role of folate in male reproduction. 

2. B vitamins and PCOS:

  • Study: "B vitamins, polycystic ovary syndrome, and fertility” (current Opinions Endocrinol Diabetes Obes, 2022)  The authors concluded: There is growing evidence folate (and possibly vitamin B12) supplementation may be beneficial to fertility in women. Although most studies have not exclusively focused on women with PCOS, there is biological plausibility and some evidence that B vitamin supplementation may be even more important for improving reproductive health outcomes in PCOS women.

3. B vitamin supplementation for fertility in IVF patients:

  • Study: "Dietary patterns and outcomes of assisted reproduction (Am J Obstet Gynecol, 2019 )  Higher pretreatment adherence to the profertility diet was associated with an increased probability of live birth among women undergoing assisted reproductive technologies. The profertility diet we developed based on factors previously related to assisted reproductive technologies outcomes (higher intake of supplemental folic acid, vitamin B12, vitamin D, low- rather than high-pesticide residue produce, whole grains, dairy, soy foods, and seafood rather than other meats.

In your journey towards enhancing fertility, paying attention to your B vitamin intake can make a significant difference. These vitamins play vital roles in hormonal regulation, DNA synthesis, and overall reproductive health. Incorporate a balanced diet rich in B vitamin-containing foods and consult with a healthcare professional if considering supplementation. Remember that a holistic approach to fertility, which includes a healthy lifestyle and stress management, can further support your goal of starting a family naturally.