Too much of anything is not good. Everything should be taken in moderation. Bird's nest has carbohydrates, protein, iron and fibre and excess will be passed out as waste. http://www.healthxchange.com.sg/answers/Pages/diet-nutrition-pregnancy-doctor-questions-answers-health-xchange-singapore.aspx
we asked the person in the stall, for second trimester, able to drink once every 2 weeks. too much will cause eczema in baby after birth( not sure if it's true).
Bird’s nest is safe but try not to consume too much. Everything in moderation.
thanks