Could you please tell me where is the cheapest place to get atkins (or comparable) vitamins?

No place!: I am a professor of nutrition and devotee of low carb diets. That said, there is no need for "atkins" brand vitamins. Simply look at the label and the vitamin content, which will be present in many other less expensive brands! follow the diet, but save money too! puritan's pride is a good source: www.Puritan.Com! the make quality, inexpensive vitamins! currently available tax free as well!