One must shop wisely. There are testing labs. There are also tons of abstracts available, many reporting either epidemilogical or double blind human experiments.
As to synthetics, that they turn a concept on its head doesn’t mean much to me. There are some synthetics that are demonstrably better than the ‘natural’ alternative.
I really do not need John McCain to help me make those decisions. More important, I don’t need him preventing me from making those decisions.
“There are some synthetics that are demonstrably better than the ‘natural’ alternative.”
Absolutely false!
If it doesn’t have its own nucleotides, it is harmful in its final effect. Loss of methyl groups is the result of taking synthetics of any kind - That’s called Accelerated Aging for those that live in Rio Linda.