Chiang Huang-jung states that currently FIR ray energy products are limited by the fact that the most beneficial frequencies vary from individual to individual, so that a single product cannot meet everyone's needs. Also, it is impossible to utilize FIR in food, cosmetics and glass products, and in those products where it can be applied, the energy can be worn off gradually by repeated washings.
江晃榮指出，目前遠紅外線能量商品仍受限於最有益的波長人人不同，難以一體化，且無法應用在食品、化妝品或是玻璃等光滑製品上，商品的能量也會隨洗滌次數遞減，以上種種缺點仍待突破。