assays of glutathione peroxidase methods enzymol 105 114-121 1984 Rapid and effective protocol to measure activity | Bulletin the National Research Centre Figure 1 from Comparing glutathione

As fir the cost, it was 100$ less than last clinic I went to with same results

[8] Similarly, individuals with thyroid disorders should be aware that ALA might affect thyroid hormone levels

The expiration date on the bottle is assigned by the manufacturer and is what you should follow if the bottle has not been opened

Wynn, 2008

PART 6: How to support absorption naturally A few simple habits help enormously: avoid caffeine around supplements take magnesium at night pair Vitamin D with healthy fats dont take all minerals together eat slowly reduce stress where possible avoid extremely high-fibre meals around supplements sleep well stay hydrated Your body is clever it just needs the right environment