Just thought I would throw out some comments.
A year and half ago we started a test with the Syneron system. We had about a dozen clients who we treated with a Candela Alex on one side and the syneron on the other, and that was randomly determined. We did bikinis and underarms (and a few other sites like back of the neck). We also did pre and post treatment photos. These included people with gray hair, blonde hair, and red hair. Also people with mixed black and gray hair.
We treated each person four times over a ten month period. About every 8 to 10 weeks give or take a little. The candela settings were based on our protocols. The Syneron settings were based on the Syneron rep who came with the machine (we borrowed it from Syneron a few days at a time) and on their protocols.
At the end, I evaluated each client, not knowing which side was treated with the candela and which side was treated with the Syneron. Then after evaluating the sides, we compared the pre and post treatment pictures and then broke the code. So this was basically a single blinded study. Single because I didn’t know what side was treated with which machine, but the clients and the manager running the study did. But I was the one making the determination and I was blind to which side was which.
First, clients preferred the Candela. They uniformly thought the Syneron was more painful. Second, our staff much preferred the Candela, they thought it was easier to use. But again, this was not blinded. So they may have been biased.
As far as results. These were looked at something like 3 to 4 months after the final treatment. The candela side was uniformly much better than the syneron anywhere there was hair that had pigment and not red. For example, a typical underarm on the candela side would have 5-10 hairs and the syneron side would have 20 to 30 hairs. And this pattern held. The conclusion was that the syneron worked on dark hair but not nearly as efficiently as the candela alex.
As to red, white, or blond hair. On the alex side, we saw not a bit of difference between the pre and post pictures. And on the Syneron side, we also didn’t see a bit of difference. What was interesting were a few clients who had mixed white and black hair. With one client on the back of his neck, almost all the black hair on the alex side was gone, leaving just the white hair. While on the Syneron side, most of the black hair was still there as was the white hair.
Our conclusion was that the Syneron IPL technology works but was not as efficient as the alexandrite technology for removing black hair and the RF technology was worthless.
Now maybe we weren’t using the RF technology properly? Maybe we needed to do more passes or something different? But since we were doing what the Syneron Rep said we should do and he was present the entire time, I don’t feel like we didn’t give the Syneron machine a fair trial.