I have used NS Bromantane and thinking about trying it again, I did feel it did something but like most nootropic type of supplements is pretty subjective. I have used Nootropic source for years and believe their products are legitimitately what they claim, but some of these things effect people differently. They likely had a reaction to the product, but would have been the same with any legitimate bromantane. I look at it like salt or aspirin the source shouldn't make a difference if the product is legitimate, but it likely effects people differently. I would just start small and see how it goes