A dietary supplement in capsule or tablet form includes a source of zinc in an amount equivalent to 6 mg to 40 mg of zinc chloride； optionally a source of chromium in an amount equivalent to 100 micrograms to 1000 micrograms of chromium picolinate； optionally from 4 micrograms to 100 micrograms of Vitamin B12； optionally an extract or powdered form of American Ginseng in an amount that provides from 20 mg to 200 mg of ginsenoside(s), or 20 mg to 200 mg of isolated or synthesized ginsenoside(s)； optionally an oil, extract or powdered form of cinnamon bark in an amount that provides 1000 mg to 5000 mg of methylhydroxychalcone polymer； optionally 2 mg to 50 mg lutein； and optionally green tea extract in an amount that provides from 200 mg to 4000 mg of epigallocatechin gallate or 200 mg to 4000 mg of isolated or synthesized epigallocatechin gallate.本發明提供一種呈膠囊或錠劑形式之膳食補充劑，其包括等效於6mg至40mg氯化鋅之量的鋅源；視情況選用之等效於100微克至1000微克吡啶甲酸鉻之量的鉻源；視情況選用之4微克至100微克維生素B12；視情況選用之提供20mg至200mg人參皂苷或20mg至200mg經分離或合成之人參皂苷之量的西洋參(American Ginseng)之萃取物或粉末形式；視情況選用之提供1000mg至5000mg甲基羥基查耳酮聚合物之量的肉桂皮之油、萃取物或粉末形式；視情況選用之2mg至50mg葉黃素；及視情況選用之提供200mg至4000mg表沒食子兒茶素沒食子酸酯(epigallocatechin gallate)或200mg至4000mg經分離或合成之表沒食子兒茶素沒食子酸酯之量的綠茶萃取物。
