They think these products, called vitamin supplements, will improve their health and protect against disease.

VOA: special.2009.04.21

I think it's obviously preferable to improve the products and sell it that way

我觉得显然较好的是改进产品质量来卖，

广告和价格的关系 - SpeakingMax英语口语达人

Another goal is to help manufacturers of antivenom medicines improve their products.

VOA: special.2009.04.22

Sarah tried different products to improve her hair but nothing worked.

VOA: special.2010.03.28