Is Energen good for pregnant?

Hi momsh!! For energen for pregnant, I drank it during my first trimester. Sabi ng OB ko, okay lang daw basta huwag sosobra. Ginamit ko lang siya as a quick snack kapag pagod na ako mag-prepare ng food. Pero paalala niya, hindi dapat ito maging substitute sa healthy meals at prenatal vitamins.