If used properly and correctly they should be okay.
Check the bottle for warnings and start with 1/2 the dose levels to test how you respond to them before full doses.

I would suggest a cleansing diet. I lost 12 pounds in 9 days and then 28 pounds in less than a month. I also lost a lot of inches too! I learned that cleansing will help the body get rid of toxins. Toxins come from a lot of things like fast food, pollution, food additives and preservatives and lots of other things. The toxins get stored in the fat in our body. To get rid of the fat, we have to get rid of the toxins by cleansing the body. This made sense to me and I decided to try a cleanse program and it worked. The weight came off fast and this kept me motivated to keep going, not like other diets where the weight loss it too slow. I did Jenny Craig, and Medifast. If you want to learn more call the toll free number 1-877-587-4647 or check out the website. This was the first time I ever did a cleanse, it was easy and I feel better. Good luck whatever you decide to do! http://thebestcleansingdiet.com