Studies have shown that NACET (but not NAC) rapidly enters the cells where it is transformed into NAC, cysteine and ultimately Glutathione
Aggregated peptide can cause more injection site irritation than intact peptide

Recent studies demonstrate that SCFAs affect bone metabolism via the processes outlined ( Figure 2 ): Intestinal Epithelial Function and Mineral Absorption: SCFAs act on IECs to promote their development and differentiation, hence affecting the mechanical, chemical, immune, and biological barriers of the intestinal mucosa, regulating electrolyte exchange (such as between mineral ions and hydrogen ions), lowering luminal pH, and directly improving the absorption of minerals specially calcium (99, 100);Systemic Signaling via G protein-coupled receptors (GPCRs): Upon entering systemic circulation, SCFAs interact with GPCRs, influencing metabolism and function in peripheral tissues, including adipose tissue, skeletal muscle, bone, and liver (101);Epigenetic Regulation: SCFAs block histone deacetylases (HDACs), therefore contributing to the epigenetic regulation of gene expression, which may influence bone metabolism (102, 103);Modulation of Inflammatory Cytokines: SCFAs can modulate the production of inflammatory factors, therefore affecting bone remodeling (104)

Also using a toner first helps with absorption, which is fast anyways like you can use it if you only have 1 minute to get out the door in the morning
It is a frequent subject of laboratory research and is supplied in this listing as a compressed oral tablet a solid-form research format intended strictly for laboratory and analytical research applications