Register here and they’ll give you a $10 coupon in your email. Then go here and add the Vitamin D to your cart for $4.99. It will give you free shipping on your whole order, so you can also get something that is $5.01 and under to make it free with your $10 code. You can also get a couple free samples at checkout with your order. Credit card is required, but you can use paypal as well.