This is a great testosterone booster, you will definitely feel it. It made me a little stronger and I broke a plateau (about 3 more kilos). I'm not sure it gives me extra energy but it makes you extremely horny, and all you think about is sex. I take it only a few times because it will make you feel like that all the time. It takes about 3-4 days for the effect to slowly wear off. I usually take it with lunch.