We are one of the leading manufacturer of plant extracts,herb extracts and botanical extracts in China. We can supply all kinds of standardized extracts and ratioed extracts. Now we can supply the Ma Huang Extract with the following specification: Total Alkaloids 3-20% Min (HPLC) Ephedrine alkaloids are amphetamine-like compounds used in OTC and prescription drugs with potentially lethal stimulant effects on the central nervous system and heart. The FDA has received more than 800 reports of adverse effects associated with use of products containing ephedrine alkaloid since 1994. These serious adverse effects, include hypertension (elevated blood pressure), palpitations (rapid heart rate), neurophathy (nerve damage), myopathy (muscle injury), psychosis, stroke, memory loss, heart rate irregularities, insomnia, nervousness, tremors, seizures, heart attacks, and death. The agency has proposed to prohibit the marketing of dietary supplements containing 8 milligrams or more of ephedrine alkaloids per serving.