Are sprouted or green potatoes safe during pregnancy

What does the evidence say about sprouted or green potatoes during pregnancy?

1. In a case-control study of Chinese mothers, eating sprouted potatoes 4 or more meals a week around conception was linked to roughly double the risk of neural tube defects overall, including a nearly 2.5-fold higher risk of anencephaly specifically, compared with mothers who rarely ate them. 1
2. The same study found higher sprouted-potato consumption was linked to more than a 4-fold higher risk of cleft lip with or without cleft palate, and the authors concluded that maternal consumption of sprouted potatoes during the periconceptional period may raise the risk of both neural tube defects and orofacial clefts. 1
3. In lab studies on human placental (trophoblast) cells, the potato toxin alpha-solanine impaired cell growth, migration, and the tube-like structures those cells form to build blood supply, effects the researchers tied to increased cell death and cellular stress responses. 2
4. Sprouting, light exposure, physical damage, and insect damage can all sharply raise a potato's natural glycoalkaloid (solanine-family) content, and light-induced greening alone has been measured to raise it as much as 20-fold. 3
5. Eating potatoes with high glycoalkaloid levels can cause nausea, vomiting, diarrhea, and stomach pain that can look like a routine stomach bug, and published case reports describe more severe reactions including low blood pressure, breathing changes, and neurological symptoms. 4

Is sprouted or green potatoes safe in each trimester?

• First trimester. This is the window the human research actually studied: eating sprouted potatoes often right around conception and in early pregnancy was linked to a higher rate of neural tube defects and cleft lip or palate. It's also the window where folate matters most, and the same study found no added risk in mothers with higher B vitamin intake, suggesting good folate status may blunt the toxin's effect.
• Second trimester. Direct pregnancy research on sprouted potatoes is concentrated on that early window, but the underlying food-safety logic doesn't change: skip tubers that are extensively green, sprouted, wrinkled, or bitter-tasting at any stage of pregnancy.
• Third trimester. The same basics still apply late in pregnancy: store potatoes somewhere cool, dark, and dry to slow sprouting, and when a sprout or green patch is more than small and shallow, throw the tuber out rather than trying to cut around it.