esa combinacion es conocida si, muchas de las weas que andan dando vuelta en el mundo del culturismo no son aceptables para los profesionales de la salud, pero lo ideal es no hacer caso de todo lo que te digan, sino que leer, leer mas y preguntar siempre, que te expliquen porque dicen que funciona, pero no creerles porque si...
mira en la pagina de muscular development sale este apartado que te entregara una idea, pero es sobre efedrina y cafeina... : Ephedrine/Caffeine Stacks. These supplements have typically been the top sellers for most health food stores, simply because they are effective. Numerous studies have been published demonstrating the combination of ephedrine and caffeine to be effective in accelerating weight loss, often preserving lean mass as opposed to the muscle wasting seen in unassisted fat loss. An unprecedented amount of controversy has arisen regarding the safety of ephedrine/caffeine supplements due to a number of adverse events reported among users. Ephedrine/caffeine use has been associated with a number of hospitalizations and several deaths. However, in studies where dosage was controlled and the subjects were monitored, ephedrine/caffeine has been declared to be safe and free from serious adverse events.
The adverse reports led the FDA to ban the sale of synthetic ephedrine/caffeine (over-the-counter drugs under the jurisdiction of the FDA), which is unfortunate, as most studies used the more tightly controlled and regulated OTC drugs. However, recent published studies have shown that some of the herbal supplements are as effective and seemingly as safe as the OTC version. Bodybuilders use ephedrine/caffeine supplements not only for fat loss, but also because it is a stimulant and can aid in maintaining energy and motivation during training.
Unlike clenbuterol, ephedrine does not directly act on the beta receptors, but causes the release of NE, which stimulates both alpha and beta receptors, so the short-term effect of ephedrine/caffeine is not as dramatic as clenbuterol, but the duration of effect is much longer, with ephedrine/caffeine promoting weight loss for at least 24 weeks.10 Doses are typically in the range of 20-25 milligrams of ephedrine and 200 milligrams of caffeine one to three times a day.