glutathione requirement per day is critical for NK cell-mediated immunity: Cell Reports Glutathione for skin lightening: a
Description
Harriott et al., 2020

This is a well-documented pattern in how people interpret bodily sensations and appearance generally, and it doesn't require anyone to be imagining things

If the same vial were diluted with 4mL instead, the concentration would be halved to 5,000mcg/mL, and the same 4,000mcg dose would require 0.8mL, or 80 units

A computer program which is part of the Computer Security Toolbox
Kubler A, Neugebauer J, Oh JH, Scheer M, Zoller JE

If you have any food sensitivities, eliminate those foods if you havent done so already
