I have read the reviews for this product, RAD 140. It’s affordable, which is a big plus. I started on it without any extra supplements or a workout regimen. I noticed increased energy and libido after a few days. I think it’s a perfect add-in if you are already taking other supplements. That way, with other supplements that increase TB, you are not blowing your testosterone levels into roid rage. So it really depends on your age and how much you want to boost your levels. If you are like me in your late 40’s and want to stop feeling so old and worn out, plus you are taking other supplements, give this product a try. I would recommend this brand for its quality and good customer service.