12 Things You Need to Know Before Going Vegan
You'll need a B12 supplement
Vitamin B12 occurs naturally only in animal foods, so you'll want to stock up on a variety of B12-fortified foods as well as a B12 supplement. B12 keeps the body's nerve and blood cells healthy and helps make DNA, so deficiencies can lead to tiredness, weakness, constipation, loss of appetite, weight loss (the bad kind), nerve problems, and depression. To find out if you need to up your intake, ask your doctor for a simple blood draw.