Louisville Kentucky
Some background: My wife has Lupus. After numerous different Dr's we were referred to a Dr that specializes in natural hormone replacement. Surprisingly, the natural hormone replace keeps the lupus systems in check for my wife. She was so excited by the results that she wanted me to do the same.
When you visit our Dr you get a full hour with him, he reviews your body chemistry, from the blood work and will discuss dietary changes to try to avoid drugs to counter any imbalances.
When taking the supplements from Xtend Life they do change my body chemistry as the Dr. expects. So I would have to say that they have a high efficacy on the supplements I take.
I take:
Ultra fish oil
Neuro- Recall (can't see this result in blood work, but he said it was an OK supplement based on the ingredients.)