Ephedra>>cordifolia. Ephedra sinica, has a total alkaloid content of 1–3% by dry weight. Ephedrine (ephedrine sulfate) constitutes 40–90% of the alkaloid content (wikipedia entry). Natural sources of Ephedrine (ephedrine sulfate) are no longer used to make pseudoephedrine, because synthetic processes are cheaper. Ephedra must have a lot more Ephedrine (ephedrine sulfate) than sida cordifolia, because it was only source used commercially before synthetics were available.
Why. Why would you purchase a dangerous substance with uncontrolled concentrations of Ephedrine (ephedrine sulfate) and Pseudoephedrine online? Ephedrine (ephedrine sulfate) is banned in us, so you cannot buy it legally there. Many legitimate medicines are sold online only to find that they are sham products. Imagine what could happen with dangerous plants like s cordifilia or ma huang.
Plant vs alkaloids. Ephedra is an actual plant (aka mormon tea, or chinese ma-huang) which contains the stimulating alkaloids Ephedrine (ephedrine sulfate) and pseudoephedrine. Some dietary supplement products used for weight loss and to enhance athletic performance contain these alkaloids. Synthetic Ephedrine (ephedrine sulfate) and Pseudoephedrine are found in over-the-counter decongestants and cold medicines, and are used to treat asthma.