It is a very good and powerful vitamin, however, personally, it caused me nausea when taken on an empty stomach. It is not recommended to take it in the morning on an empty stomach.

So-so! I've had it for over a month and I don't see any notable quality! Maybe, I mean maybe, I would buy it again!

Given the price, it will be difficult to find a competitor. After a few days, you feel a significant difference in endurance and strength (I am involved in karate, hiking, and cycling). It may be a bit psychological, but it doesn't matter. What matters is how you feel. Don't expect miracles, it's just an excellent product at a ridiculously low price with Bayer's guarantee. I will buy it again.