I was thumbing through the Feb LEF mag & noticed that phellodendron tree bark was being touted as an inhibitor of monoamine oxidase B (MAO-B). MAO-B is an enzyme which breaks down dopamine. Our levels of the 'feel-good' neurotransmitter decline about 13% per decade after age 45.
MAO-B is also a target in Parkinson's & Alzheimer's.
I remembered that there was a product - Nexrutine - which was based on Phellodendron amurense bark extract, that was used in a number of PCa studies.
In fact, Kumar, et al, had 9 papers between 2006-2015 [1].
I used Nexrutine for a while, but the product seemed to disappear.
The same company had better luck with Relora, which was marketed as a weight control aide. That's a bit misleading, since it lowers the anxiety that sends some to the refrigerator in the middle of the night. Taken before bed, you wake up with lower levels of cortisol, the stress hormone. Useful when one has a lethal disease.
Relora contains Magnolia officinalis bark AND Phellodendron amurense bark.
Magnolia officinalis bark is the source of Honokiol, which has 16 PCa hits on PubMed [2]. (& there are other PCa papers that do not refer to Honokiol.)
Various brands sell Relora, so one should shop by price. e.g. [3].
You can also pay a lot for honokiol, or a little ($7.99) [4]:
"Magnolia Extract (Magnolia officinalis) (bark) (standardized to minimum 90% honokiol + magnolol)"
(& there are PCa papers for magnolol too [5])
(& PCa papers for MAO-B also [6])
-Patrick
[1] pubmed.ncbi.nlm.nih.gov/?te...
[2] pubmed.ncbi.nlm.nih.gov/?te...
[3] swansonvitamins.com/p/swans...
[4] swansonvitamins.com/p/swans...