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A purity number without the supporting chromatogram is just a claim, not evidence

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WADAs categorisation of such substances includes the following: Threshold Substances , the concentrations of which must be assessed using a specific quantification procedure ( Validated Quantification Procedure ) before determining whether a concentration amounts to an adverse analytical finding, by reference to the applicable Thresholds set out in Technical Document TD2019DL

Zhdanova IV, Wang SY, Leclair OU, Danilova NP (2001) Melatonin promotes sleep-like state in zebrafish

This is because anemia (B12 deficiency) is caused by a lack of enough oxygen carried throughout your body, making you feel weak and tired