How Should GHK-Cu Be Stored and Why
As we age, stress, poor diet, and environmental toxins deplete glutathione levels, leading to increased inflammation, fatigue, and signs of aging
#18 at least for cats, lancets are lancets, they don't expire, the main differences are what gauge they are -- and to a certain extent how sharp they are (if you use a pen device to hold the lancet, it does make a difference, you need to use the same brand/type
Nutritional authorities often establish the recommended nutrient levels on supplement labels based on what it takes to avoid deficiency
Int J Mol Sci 23(18):10546
[1] This review focuses on glutathione as a skin-lightening agent