Or it could be a purified protein, or section of a protein, that they think binds to their protein and are looking to confirm that interaction
For example, during wakefulness, A levels increase and decrease during sleep in mice, and this phenomenon is similar in humans with AD (Kang et al., 2009

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ACTIVE INGREDIENTS: Reduced L-Gluta, N-Acetyl Cysteine, Probiotic (L plantarum), Milk Thistle Extract, Alpha Lipoic Acid, Sodium Ascorbate
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