The threat of osteoporosis comes from fear of an acidic body ph, not lack of calcium. Proteins and fats are extremely acidic foods, whereas most carbs are not. Ketones themselves are acidic. The excess acid errodes the calcium structures in the body like bones and teeth. This is where the semi-myth of protein "leeching" calcium from bones comes from. While it is totally untrue that protein leeches calcium from the bones, having an acidic body ph (contributed to in part by excess protein consumption) could in theory cause a weakening of bones.

Bottom line, living on atkins induction is not a good idea... I tend to agree. I don't think it will hurt to use it to lose weight, but to maintain weight you need more balance.