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.
Vitamin B-12 is found primarily in protein foods, although some nonprotein foods are fortified with it. The best B-12 sources include clams and liver, as well as fish, cheese, yogurt and fortified cereals.yridoxine and Biotin. Pyridoxine, or vitamin B-6, helps your body break down protein and also play a role in cognitive development, red blood cell production and immune health. Some of the richest sources of pyridoxine include chickpeas, beef liver, tuna, salmon and chicken.