Your baby resembles a tadpole more than a human, but is growing fast. The circulatory system is beginning to form, and the tiny heart will start to beat this week. Your baby is the size of a sesame seed. Read about your pregnancy at 5 weeks.
Stores of B12 can last for up to a year. Foods high in Vitamin B12 include shellfish, liver, fish, crab, fortified soy products (tofu, soymilk), fortified cereals, red meat, low fat dairy, cheese, and eggs.
The good news? âChances are the average person is already getting plenty of B vitamins from the food they eat.â Read on to find out why each B vitamin is so important. And make sure youâre eating the right foods to get plenty of them in your diet. RELATED: 12 Energy-Boosting Recipes Rich in Vitamin B. Vitamin B: The 8 B Vitamins Plus Top Food Sources