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.
A wide variety of foods contain vitamin B6, including potatoes, bananas, beans, seeds, nuts, red meat, poultry, fish, eggs, spinach, and fortified cereals. Teen guys need 1.3 mg of vitamin B6 daily and teen girls need 1.2 mg.
The only source of B-12 is through fortified foods. Some of the best sources of vitamin B-12 include: eggs. cheese (one serving is the size of a domino) a glass of milk (1 cup) fish (a serving of any meat is the same size as a deck of cards) shellfish. liver.