Pharmacology and toxicology
Pyridoxine is the co-enzyme of some amino acid decarboxylases and transaminases. Vitamin B6 is used in North America in combination with doxyiamine as therapy for excessive vomiting in pregnancy (hyperemesis) (see Chapter 2.4). The vitamin B6 concentration in the mother's blood is reduced throughout the entire pregnancy. By contrast, the concentrations in the fetal blood are about three times as high (Cleary 1975). There is no indication as yet for teratogenicity (see Chapter 2.4).
Recommendation. Supplementation with vitamin B6 is only necessary in exceptional cases, for example during tuberculostatic treatment with isoni-azid (see Chapter 2.6). For treatment of nausea and vomiting in pregnancy, see Chapter 2.4.
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For many years, scientists have been playing out the ingredients that make breast milk the perfect food for babies. They've discovered to day over 200 close compounds to fight infection, help the immune system mature, aid in digestion, and support brain growth - nature made properties that science simply cannot copy. The important long term benefits of breast feeding include reduced risk of asthma, allergies, obesity, and some forms of childhood cancer. The more that scientists continue to learn, the better breast milk looks.