Listen if your body is toxic and you go on a cleanse the headache and nautious feeling will pass. It is just your body releasing toxins. If you get a bad headache and get really nautious that means you are really toxic. Your body is ridding all the toxins. That is why it is so important to drink alot of water distilled is the BEST. As far as that other person being constipated you have to drink the water and you also should be eating veggies because the 2 shakes contain dairy so your one meal should consist of vegtables. I also have a paper on the cleanse that you should all do raw vegtable juicing. Anyway if you guys look on on line with fasting and cleansing the simptoms you are experiencing are normal. You need to allow the body to rid itself of all the horrible toxins and garbage that is in the system and sometimes it may not be pleasant but after that you will feel like a new person. If you need any additional help please don't hesitate to write me back. Loriann

This is correct what loriann said. It's like a drug addict person takes all these drugs and they stop cold turkey. Well the body still wants that drug. That's what we have in our body bad toxins. This product is great. Just think you are doing your body good your kidney's, for one.