Vitamin A in several forms lowered risk for stomach (gastric) cancer in a new study. Beginning in 1997, researchers from the Karolinska Institute in Stockholm, Sweden, measured the diets of 82,002 Swedish adults aged 45 to 83 and followed up for an average of 7.2 years. At the end of the follow-up period, 139 participants had been diagnosed with gastric cancer. Doctors reported that those who had consumed the most vitamin A from diet and supplements had an average 46.5% lower risk of gastric cancer. Researchers measured vitamin A, retinol, alpha-carotene and beta-carotene.