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From Menarche to Menopause: Why Methylation Matters for Women’s Health

Explore BioCare’s comprehensive guide to methylation and female health. Learn how key nutrients such as methylfolate, B12, and zinc support oestrogen metabolism, mood regulation, pregnancy, and menopause—helping to offset widespread MTHFR variants and environmental toxin load.

 

Methylation is a foundational biochemical process, reliant on a steady supply of B12, folate, B2, B6 and cofactors including choline, betaine, magnesium and zinc. It helps regulate everything from hormone balance to neurotransmitter production. For women, methylation becomes especially significant as the body cycles through hormonal changes – from puberty to pregnancy, and later, menopause. Where 60-70% of the global population have at least one MTHFR gene variant,(1) combined with the environmental challenges we face, could methylation be a missing piece of the puzzle for women struggling to navigate these major life changes?

Throughout puberty, DNA methylation is involved in the activation or repression of the KISS1 gene which influences the release of hormones that control ovulation and reproduction. Demethylation switches on the KISS1 gene, leading to a cascade of hormones supporting oestrogen and progesterone synthesis,(2) alongside demethylation of aromatase which converts androgens into oestrogens.(3) The rapid influx of sex hormones can cause different symptoms in teenage girls like heavy, painful periods, acne and low mood. The oral contraceptive pill (OCP) is a common recommendation to manage these symptoms, which can impact nutritional status, depleting key cofactors including B2, B12, folate, zinc and magnesium.(4)

Methylation is heavily involved in neurotransmitter metabolism, central to mood regulation and stress response. It also plays a major role in oestrogen detoxification. Catechol-o-methyltransferase (COMT), is an enzyme which uses SAMe to conjugate 2-hydroxyestrone (2-OHE1) and the potentially harmful 4-hydroxyestrone (4-OHE1).(5) COMT single nucleotide polymorphisms (SNPs) are also fairly common, which can further hinder the processing of these hormones and other toxins.

Women expose themselves to approximately 168 chemical ingredients daily from personal care products alone.(6) Some of these chemicals can be endocrine disrupting chemicals (EDCs), including xenoestrogens which mimic oestrogen. Poor methylation capacity combined with xenoestrogens (from OCP, makeup etc.) add to the overall load, which can lead to high circulating oestrogen and health issues such as PMS,(7) fibroids,(8) infertility,(9) breast tenderness,(10) and depression(11). 4-hydroxyestrone also has the potential to become the free radical 3,4-quinone which can damage DNA, increasing the risk of hormone related breast cancer.(12) Furthermore, EDCs have been linked to reduced ovarian reserve,(13) endometriosis(14) and an increase in the severity of PMS symptoms.(15)

If a woman’s journey involves having children, methylation has a dual role, helping to shape the developing baby’s genes, whilst maintaining the mother’s own hormonal and immune balance. Folate is one of the main vitamins recommended for a healthy pregnancy due to its link with neural tube defects and preterm birth.(16) Whilst folic acid is widely prescribed and used, it requires an enzymatic reduction by several enzymes, including MTHFR, in which 60-70% of us carry a polymorphism. Folic acid is harder for the body to utilise, which is why methylfolate is the preferred option to supplement with. Not only is it more easily absorbed, but methylfolate donates a methyl group to the methionine cycle, helping to make SAMe needed for choline, supporting neural development of the baby, and the breakdown of homocysteine which in high amounts, can increase the risk of pre-eclampsia, cause placental abruption(17) and lead to low birth weight.(18)

The rollercoaster ride that oestrogen and progesterone go on throughout the perimenopause  affects most body systems, including the cardiovascular system due to the fluctuating levels of oestrogen contributing to high homocysteine.(19) This can induce endothelial damage, local inflammation and oxidative stress, leading to hypertension, accelerated atherosclerosis and impaired lipid metabolism.(20) Supporting methylation can help regulate high homocysteine via remethylation or transulphuration pathway,(21) helping to mitigate some of these effects. At certain times during perimenopause, women may also experience higher levels of oestrogen compared to their reproductive years,(22) making methylation even more of a priority. 

As women transition through menopause, methylation remains important to long-term health. Declining oestrogen accelerates bone remodelling, increasing osteoclast-mediated bone resorption relative to formation(23). Elevated homocysteine has been associated with poorer bone quality, including altered collagen cross-linking, extending its relevance beyond cardiovascular effects(24). Folate and B12 support remethylation of homocysteine to methionine(25). Adequate calcium and vitamin D remain central to bone health, while magnesium and zinc also contribute to healthy bone metabolism during this life stage(26). 

For Multinutrient options supportive between menarche and early stages of perimenopause, consider BioCare’s Female Multinutrient, which provides all key nutrients including magnesium, vitamin B6, iron, zinc, rosemary, green tea, and more. Menopause Multinutrient can be used before, during and beyond menopause, with optimum levels of B5, magnesium, zinc, calcium, vitamins D & K2, boron, lycopene, and green tea. Both Multinutrients include methylated forms of folate and B12 to aid methylation processes. Where more focused methylation support is appropriate, or higher doses are required because of deficiency, higher needs, or genetic variants, BioCare’s Nutrisorb Methyl FolGuard, Nutrisorb Methylfolate, Nutrisorb Methyl B12, and Methyl B Complex provide alternate options, all available through Amrita Nutrition.

From menarche to menopause, methylation underpins every hormonal transition. With widespread methylation variants and growing environmental pressures, optimising methylation is essential for hormonal regulation, fertility, pregnancy, mood, cardiovascular health and bone health across a woman’s lifespan.



About the Author

Krista Swann is a registered Nutritional Therapist and founder of Swann Nutrition, specialising in women’s hormone balance and gut health for clients with chronic conditions. Taking a personalised, root-cause approach, she empowers individuals through tailored diet, lifestyle, and behavioural interventions. In her role as a Clinical Nutritionist at BioCare, Krista guides clients towards targeted supplement strategies while delivering practitioner education through professional webinars, seminars, and workshops.

 



References

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