On the food page it says create a custom food there you can put in your vitamins and maybe supplements depending on what it is. The weight tab at the top of the page is where you find your BMI. Click on weight and scroll down you will see it. I hope this is helpful. You sound motivated so go for it
you can do it.
52 year old (5'4")
Highest weight 234 (10 years ago)
Starting Weight 185.8 (4/10/12)
First Goal 160 (7/10/12) 161.2
Second Goal 155 (8/31/12)
Current Weight 166 and struggling (5/19/14)
Goal - 140# lose weight slowly, build muscle & lower body fat
"There is no diet that will do what eating healthy does. Skip the diet. Just eat healthy"