By Shawn Radcliffe Men's Fitness
If you use pre-workout sports supplements to help you build muscle fast, check their labels. Your favorite over-the-counter boost could contain DMAA, an ingredient flagged by the U.S. Food and Drug Administration last spring for review.
In spite of a warning letter sent by the FDA to 10 manufacturers, all 16 products listed in the letter are still available online, according to a new study published in Annals of Internal Medicine. This includes reliable stores like *** and drugstore.com.
The FDA is concerned about a lack of data on the safety of DMAA (aka dimethylamylamine), and gave the companies 15 days to respond. Canada and the U.K. have already banned products that contain DMAA.
This pre-workout supplement, which is used to (supposedly) build muscle more quickly, acts as a stimulant. While thereís little data on whether DMAA is safe, side effects can include:
Increased blood pressure
Irregular heart beat (arrhythmia)
Risk of heart attack or stroke.
The FDA has the power to pull DMAA products from stores, but may be waiting for more information about their safety. In the meantime, if you choose to use sports supplements, keep these tips in mind:
Check the labels to see if your supplements contain DMAA.
Follow the instructions on the product label on how much to take.
Talk to your doctor about whether DMAA supplements are right for you.