The most commonly found heavy metal elements in herbal materials include lead, cadmium, mercury and arsenic. Plants may absorb and accumulate heavy metals that may exist in their surrounding environment (soil, water and air). Acute heavy metal intoxications may damage central nervous function, the cardiovascular and gastrointestinal (GI) systems, lungs, kidneys, liver, endocrine glands, and bones. Chronic heavy metal exposure may lead to degenerative diseases of these systems and may increase the risk of some cancers.
Lead: Harmful for nerve system, bone hematopoietic function, digestive system, male reproductive system and even cancer or gene mutation.
Cadmium: cadmium accumulation causes arteriosclerosis, nephrarctia, bone osteoporosis, and likely cancer or malformation of infants.
Mercury: Mercury is the most toxic element in heavy metal pollution. The combination of apoenzyme and mercury ion restricts enzyme activity, a barrier for the normal function of cell. Organomercurial compound accumulation in human body invades neural center, destroying blood vessel of brain.
Arsenic: arsenic in human body accumulates at osteoporosis parts, like liver, kidney, spleen, muscle, hair and fingernail. Arsenic usually affects nerve system and stimulating blood creation organs. Long-time contacts with arsenic will poison cell and capillary, or likely causing malignant tumor.
Heavy metal pollution has to be prevented at the source.
Jing Tang herbs are cultivated in plantation bases that are chosen and established on GAP (Good Agriculture Practice) standards. We monitor the quality of soil, water and atmosphere of the plantation areas to ensure the environment are free of heavy metals.
Our suppliers are equipped with atomic absorption spectrophotometer, atomic fluorescence spectrophotometer and microwave digestion systems that can detect and eliminate heavy metals.
Tests including thin layer chromatography (TLC), high performance liquid chromatography (HPLC) and gas chromatography/mass spectrometry (GC/MS) are used to ensure our products are free of heavy metal content .
Our standards for heavy metals are listed below:
|| ≤ 5.0 ppm
|≤ 3.0 ppm
|≤ 0.5 ppm
||≤ 1.0 ppm