Multi-level marketing (MLM) business has penetrated health sector and made doctors as potential agents in product marketing. In addition to being publicly trustworthy figures, doctors' full authority in prescribing drugs makes it easier to perform MLM business. Doctors clearly have conflict of interest on MLM products with health and beauty claims. Exploiting patient trust for personal gain is against the medical ethical values. Most of health products on offer claim benefits which has not scientifically proven and sometimes the prescribing does not consider urgency and relevance to patient's condition. Therefore, it's high time for ethical assertion on involvement of doctors in MLM business. In addition, government participation in supervising the marketing of health products by MLM companies must be improved so that violations can be immediately followed up.