I just bought two bottles from The Vitamin Shoppe.

How bizarre.

N-Acetyl Glucosamine is an amino sugar that is the precursor to body’s hyaluronic acid*

And the stuff's dirt cheap.

NAC is N Acetyl Cysteine. It has been used to boost the immune system for decades. It helps replenish glutathione, your most important anti-oxidant. Glutathione only works in liposomal form as the rest is not absorbed. You do need to have adequate levels of selenium in your body to make it work. It is designed to help breathing.

Glutathione

I was taking Alpha Lipoic Acid from Carotec.

ALPHA LIPOIC ACID (ALA) helps defy the march of time. How? Alpha lipoic acid recycles vitamin C and E (literally makes both "last longer" in the body), helps liver, cardiovascular health, immunity, eye-health and is a potent detoxifier, as well as an "anti-aging" ingredient.*

How can one nutritional supplement promise so much? Because, it is nature's way of coordinating a multitude of biochemical jobs into one neat chemical, that's how. Alpha lipoic acid increases the body's glutathione levels better than glutathione supplements.* Our alpha lipoic acid is made by a leading Italian pharmaceutical firm which is recognized by European governmental bodies as being "effective." Alpha lipoic acid increases our body's glutathione levels, which is key to optimal health.

Dr. Lester Packer, PhD of the University of California at Berkeley, California, said that alpha lipoic acid "is the most versatile and powerful antioxidant in the entire antioxidant defense network."