There are plenty of better options for sun protection today, but it is considered "safe as used" (and sunscreens are pretty well regulated) and it is available worldwide (can be used up to 10% in the EU and up to 7.5% in the US)
Couto, N., Wood, J., & Barber, J
during the first session, mice were allowed to explore the arena without objects (habituation), and in the following three trials, two objects of different color, shape, and texture were present in defined locations in the box (training, day 1)
Conclusion: Alumina, at homoeopathic potencies, produced measurable and graded changes in markers of cerebral oxidative stress, with higher potencies yielding greater biochemical normalization
Glutathione is the most abundant, and arguably the most important, antioxidant in the body