Lysine, also known as L-lysine, is an amino acid that plays a role in the absorption of calcium, a nutrient that contributes to fetal bone development. Although lysine is considered safe for most people, research is lacking on the safety of taking lysine supplements during pregnancy. Consult your obstetrician or midwife before taking lysine or any other dietary supplement if you are pregnant.
Benefits
Lysine helps your body absorb calcium, a nutrient essential for the growth and development of your baby's teeth and bones. Expectant mothers who suffer from a calcium or lysine deficiency may benefit from taking a lysine supplement during pregnancy.
The NYU Langone Medical Center reports that regular use of lysine dietary supplements may help reduce and prevent herpes outbreaks, as well. If you're pregnant, and you have herpes, regular lysine supplementation could reduce the likelihood of transmission of the virus during delivery. Again, discuss this with your doctor, who may or may not think supplementation is advisable.
Safety
The best way for your body to obtain essential nutrients is through food. Protein-rich foods are a solid source of lysine and provide other nutrients, as well. Animal products, nuts, soy and wheat germ are rich in lysine and protein, essential nutrients during pregnancy. Although a lysine-rich diet is considered safe during pregnancy, taking dietary supplements could cause side effects.
Side Effects
Although lysine supplements are generally considered safe, they can have side effects. Upset stomach and diarrhea are possible with high dosages. A buildup of lysine in your body can increase your risk of developing gallstones. Lysine supplements may also cause an allergic reaction. Stop taking the supplement and seek medical care immediately if you experience difficult breathing, facial swelling or hives. As of 2011, research was lacking on the possible effects on a fetus.
Warning
As of 2011, the Food and Drug Administration had not approved lysine supplements. The possible side effects and risks were still under study. Avoid lysine supplements if you have kidney or liver disease, gallstones or high cholesterol. Again, if you are pregnant, do not take any lysine supplement without your doctor's OK.
