I just finished my second bottle, but didn't take it consistently. I have one unopened bottle that I will start tomorrow. I didn't notice any extra energy. I have had good growth, but I take ALOT of vitamins. I just got my "V" cut out of my hair which took me back to a little past arm pit, but it's healthy now. I was in between bra strap and mid-back.
I recently bought a new bottle. Still great for energy not sure about faster hair growth BUT I do believe it contributes to healthier hair.
I'm on my second bottle. I don't think I will purchase it again once this one is finished. Reason being is that I take and experiment with so many different supplements (for different things, not just hair growth) so it's hard for me to say what's contributing to any changes in my body. That's not say that it doesn't help for hair growth or overall health. When first started taking it I noticed that my nails grew like crazy, and I noticed extra energy. Not so much now.
I totally get it. I'm not patient enough to use just one product at a time, so I have a hard time determining if something makes a small difference. I guess I'm still searching for that miracle product that makes a huge difference, although I don't believe one really exists. The way I look at it, as long as I'm trying different things, at least I'm actively taking good care of my hair and not getting bored with the journey.