Breastfeeding

Breastfeeding is the period when an infant is fed with breast milk. It is a distinct health context for reviewing wellness information, separate from pregnancy and from treating a medical condition. Information about supplements during this period may not apply equally to everyone.

Vitamin B2 (Riboflavin) has been studied in breastfeeding in relation to riboflavin concentrations. Supplementation at about 1 x RDA resulted in a 2–3 fold increase in free riboflavin, while total riboflavin concentrations in LNS were greatly increased compared with the control group at all time points.

The reported finding concerns changes in riboflavin concentrations rather than a direct measure of breastfeeding success or another clinical outcome. The available description does not specify how long supplementation continued, the timing of the first measurable change, or whether the concentration differences led to benefits for the breastfeeding parent or infant. The health status of the participants is also not specified, so the applicability of this finding to particular breastfeeding situations is unclear. A clinician can help interpret whether this type of evidence is relevant to an individual medical context.

Items flagged during breastfeeding are primarily grouped by the possibility that their constituents enter breast milk or by the absence of reliable safety information for nursing infants. Bacopa Monnieri, Horny Goat Weed (Epimedium), Tongkat Ali (Eurycoma), Turkey Tail, Valerian Root, Acetyl-L-Carnitine (ALCAR), American Ginseng, Ashwagandha, Astaxanthin, Astragalus, Black Elderberry, Cordyceps, Echinacea, Ginkgo Biloba, Glucosamine, Glutathione, Glycine, Holy Basil (Tulsi), Hyaluronic Acid, L-Theanine, Maca Root, MSM (Methylsulfonylmethane), Reishi, Resveratrol, Saffron Extract, Shilajit, Saccharomyces Boulardii, Chaga, and Lion's Mane have insufficient lactation or infant-safety information, including uncertainty about transfer into breast milk.

Several items are flagged because specific infant effects are possible. Berberine may displace bilirubin from albumin and cause kernicterus, while Green Tea Extract (EGCG) may expose infants to caffeine and catechins associated with irritability and sleep disturbances. Passionflower and Melatonin may cause infant drowsiness; St. John's Wort may be associated with colic, drowsiness, or feeding difficulties; and Oregano Oil may cause gastrointestinal distress or allergic reactions. Sea Moss (Irish Moss) can transfer iodine, which may contribute to neonatal thyroid dysfunction, while Cod Liver Oil can increase infant exposure to vitamin A. Beetroot Extract may expose infants to nitrates associated with methemoglobinemia, and Spirulina may contain heavy metals and microcystins.

Hormonal, immune, or neurotransmitter-related uncertainty is relevant to Saw Palmetto, Tribulus Terrestris, Tryptophan, Tyrosine, 5-HTP, Reishi, and Echinacea because infant developmental or physiological effects have not been established. Garlic compounds may cause gastrointestinal irritation, fussiness, altered feeding patterns, or changes in milk acceptance. Vitamin B6 (Pyridoxine) is distinct because pharmacologic doses can suppress lactation, although ordinary nutritional doses are compatible with breastfeeding. Vitamin B3 (Niacin) is flagged because safety of pharmacologic supplementation and exposure to elevated niacin levels are not established.

CBD (Cannabidiol), Coffee Enema, Black Salve, Chondroitin Sulfate, and Lemon Balm (Melissa) also raise concerns about transfer, unpredictable exposure, or unknown infant effects. Cigarette Smoking can expose the infant through breast milk and contaminated air, reduce milk production, and increase infant respiratory illness and sudden-infant-death risk. A clinician can help assess any medical condition or supplement use during breastfeeding.