Aerose91: It's not clear what you're after. Are you looking for a buzz or for side effects? Are you looking for nootropic-type stimulation?
How sick are you? How is your energy generally?
If you're not extremely fatigued or have obvious nervous system problems, then it's entirely conceivable that these supplements aren't going to do anything for you.
These supplements have completely and totally changed my life. In two years I've gone from barely being able to work and walk my dogs to being able to work out 3-5 times per week (HIT, Pilates, etc.), plus my job, plus more dog walking. Plus some housework, although I'm still lagging on that. Because the energy is not limitless and because I don't want to throw myself into a crash, I still have to prioritize what I spend my precious energy on, and at this point housework still isn't at the top of my list. Sleep, family & dogs, work, and exercise are, in that order.
Point being, back when I first got here and I was still in bad shape the supplements produced noticeable effects. They were absolutely as powerful as some pharmaceuticals that I've taken, in terms of what I could feel them doing to my body. I got a lot of side-effects (although not as bad or as many as some), and it took about a year for them to subside.
But NOW that I'm healthier, I don't get sides or even the "kick" I used to get. I get stable, almost-normal energy from day to day. I don't feel anything more from a shot of mB12 and 1000mg of LCF than someone who's so healthy they don't need the supps. I keep taking them, though, because I know they are what made me healthy. I dearly wish I didn't have to, however, and wouldn't be taking them if I didn't need them.