Contrary to what people might think, it's not a very easy easy area to monetise outside of Adsense. I am not talking about beauty niche, which sometimes wrongly is bundled with health. The problem with the health products that are readily available is that they almost always fall into the the alternative or natural health area. Anyone running a serious health site would probably find it difficult to promote these products. Yes people do make money from affiliate products from natural health category but it's mostly through small affiliate sites.