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Among them, its ash content is 3.18%, heavy metal content 10 ppm, arsenic (As) content 2 ppm, lead (Pb) content 2 ppm, cadmium (Cd) content 0.2 ppm, mercury (Hg) content 0.1 ppm, all of which conform the Traditional Chinese Medicine--Determination of heavy metals in herbal medicines used in Traditional Chinese Medicine (ISO 18664:2015)

Use sterile handling, avoid vigorous shaking and repeated freeze-thaw cycles, and do not use the material if the seal is damaged or if persistent particles, unexpected cloudiness, or discoloration is present after dissolution

Values below 170 to 250 pg/mL for adults indicate a deficiency

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More recent work by Jerry Turner and others [29, 41] has provided substantial data supporting the presence of two distinct paracellular pathways: the pore pathways that transports ions and small uncharged molecules, and the leak pathway that transports larger molecules regardless of charge