Thank you for this addition. Also, thank you for the reference. We now have peer-reviewed journal articles for every single item.
The location where I buy Turmeric has it as a supplement, not a spice. It is standardized to 95% curcuminoids.
Thank you all for your responses.
BTW, all of the items we have discussed I have purchased very inexpensively at: Swanson Vitamins, and no I don't own stock or anything. The entire list can be had in reasonable quantity for under $100.
The revised list is then:
Sambucol (this is somewhat controversial, but I like it)
Turmeric (standardized to 95% curcuminoids)
St. Johns Wort
By the way, an interesting observation I have made about all of this. Most of these items are listed as antioxidants in the nutritional catalogs, in fact, all of them are antioxidants except Sambucol, St. Johns Wort, and maybe Cinnamon.
When I went through my lists and purchased OTC products, I first ordered two of each. Then I went back and ordered four of each. Now I'm going to order another four (I'll order the NAC-Sustain this time). With a product like NAC, if you have a few people in the family and take it twice a day, a bottle doesn't last long!
Same with Elderberry extract. I did choose the Planetary Formulas brand because it had twice the potency per volume, but it has since gone up twice in price!
"Antioxidants" has become a strong marketing word in vitamin/nutrition sales. Perhaps someday someone can explain it to me in a way that I find persuasive. For now, that word triggers my hype-sensor more than it satisfies my understanding.
But elsewhere, I saw speculation that the claims of the uselessness of most resveratrol supplements was a ploy by the big pharmaceuticals to reduce the impact that that supplement risked having on their drug sales.
Do a Google search for Longevinex for more details.
As best as I can tell, the jury is still out.
We need some lab or clinical trials on the usefulness of ordinary resveratrol supplements, not lab grade, nitrogen packed stuff.
I'm adding Cat's Claw to my collection.