Pregnancy Fundamentals

Adequate maternal folate status is well established as important in early pregnancy. Most prenatals use folic acid, which must be converted to 5-MTHF before use. Up to 40% of women carry a variant of the MTHFR gene that impairs this conversion. A 2017 meta-analysis in the European Journal of Clinical Nutrition found that 5-MTHF raises blood folate levels more effectively than folic acid regardless of MTHFR status.

Choline is required for synthesis of phosphatidylcholine, a key structural component of cell membranes, and acetylcholine, involved in memory and muscle function. A 2018 randomised controlled trial published in the FASEB Journal found that higher maternal choline intake was associated with improved infant information processing speed. The adequate intake during pregnancy is 450mg/day; most prenatals contain none.

Vitamin D receptors are present in the uterus and placenta, and adequate vitamin D status supports normal maternal immune function and the maintenance of healthy bones. The UK government recommends a daily vitamin D supplement during pregnancy and breastfeeding.

Ferrous bisglycinate is a chelated form in which iron is bound to glycine, improving absorption compared to ferrous sulphate while reducing GI side effects. A study in Acta Haematologica found equivalent or superior haemoglobin responses with markedly fewer GI complaints.

Iodine is critical for fetal neurological development, particularly in the first trimester before the fetal thyroid is functional. The WHO classifies iodine deficiency as the leading preventable cause of intellectual disability worldwide. UK dietary surveys consistently show inadequate iodine intake in women of reproductive age.

D3 increases calcium absorption; K2 (as MK-7) activates osteocalcin and matrix Gla-protein, directing calcium to bone and preventing arterial calcification. Supplementing D3 without K2 may allow calcium to deposit in soft tissue. MK-7 has a longer half-life than MK-4, maintaining active levels with a single daily dose.

A 2014 Cochrane review found vitamin B6 associated with reduced nausea severity in early pregnancy. It is recommended as a first-line approach for pregnancy nausea in several clinical guidelines, and plays a role in oestrogen metabolism and neurotransmitter synthesis.

Niacin is a precursor to NAD+, a coenzyme central to cellular energy production and DNA repair. Research into the role of NAD+ during early development has generated significant scientific interest in adequate niacin status during pregnancy, particularly given NAD+'s role in the energy-intensive processes of rapid cell division in the developing embryo.

Preformed vitamin A (retinol) is teratogenic at high doses and specifically contraindicated in pregnancy supplements. Beta carotene is converted to retinol on demand; the body regulates this conversion according to its needs, making excess intake safe. This is why Fundamental Woman uses beta carotene rather than retinol.

Pantothenic acid is a precursor to coenzyme A (CoA), which participates in over 100 metabolic reactions including the citric acid cycle and fatty acid synthesis. CoA is also required for the synthesis of steroid hormones including progesterone, which is key for early pregnancy.

Manganese is a cofactor for manganese superoxide dismutase (MnSOD), a mitochondrial antioxidant enzyme. It is also required for the synthesis of glycosaminoglycans, structural components of bone and cartilage, which is key for fetal skeletal development.

Biotin is a cofactor for five carboxylase enzymes involved in fatty acid synthesis, amino acid metabolism, and gluconeogenesis. It plays a role in histone modification and gene expression regulation, increasingly recognised as relevant to embryonic development. Biotin deficiency has been associated with fetal abnormalities in animal studies.

DHA accumulates rapidly in the fetal brain and retina, particularly during the third trimester. Maternal intake contributes to the normal brain and eye development of the fetus; the beneficial effect is obtained with a daily intake of 200mg DHA in addition to the recommended daily intake of 250mg EPA and DHA for adults.

EPA and DHA are long-chain omega-3 fatty acids found primarily in oily fish. EPA complements DHA within maternal omega-3 status and contributes, together with DHA, to normal heart function at a daily intake of 250mg EPA and DHA.