What’s Selling is our monthly review of what our retailers nationwide say is selling well in their stores. This month, we’ve compiled data from April to June to see what was popular in the second quarter of 2012.

New Brunswick, NJ—A team from Rutgers University believes two forms of vitamin E could be a huge help in the fight against colon, lung, breast and prostate cancers. The group zeroed in on the gamma and delta-tocopherols forms of vitamin E, derived from soybean, canola and corn oils. “There are studies suggesting that vitamin E actually increases the risk of cancer and decreases bone density,” says Chung S. Yang, director of the Center for Cancer Prevention Research at Rutgers Ernest Mario School of Pharmacy.

San Diego, CA—Lovers of spicy jalapenos, habaneros and other chili peppers are in luck because a recent study found that they are heart-healthy foods. This report was part of the 243rd National Meeting and Exposition of the American Chemical Society.

On April 24, the U.S. Food and Drug Administration (FDA) issued warning letters to 10 manufacturers and distributors of dietary supplements containing dimethylamylamine (DMAA). DMAA is commonly found in sports and weight-loss supplements.

Pittsburgh, PA—First-quarter sales for GNC Holdings Inc. better than expected. Revenues were $624.3 million, which was 23% higher than they were last year at this time.

Laguna Beach, CA—Richard A. Passwater, Ph.D., scientific editor/author of WholeFoods’ Vitamin Connection column and well-known nutrition researcher, and fish oil authority Jorn Dyerberg, M.D., DMSc., have co-authored a new book about omega-3s that is due out this summer.

The 2012 Natural Products Expo West tradeshow was the largest in its 30-year history. Some 60,000 industry members attended the event, which ran March 8–11 at the Anaheim Convention Center. Show organizers said attendance of retail buyers grew 13% this year, which made for a good show, say many exhibitors.

Washington, D.C.—A recent study commissioned by the Council for Responsible Nutrition (CRN) found that dietary supplement use for adults ages 18 and over is on the rise. Compared to 66% of adults in the U.S. in 2010, supplement usage is now at 69%.

New from Buried Treasure is Cardio Care+. This liquid supplement offers a combination of nutrients that are research-backed to have heart-protective properties, says the company. Says Buried Treasure, “These readily bioavailable Liquid Advantage vitamins, herbs, phytonutrients and antioxidants synergistically support cardiovascular health.”