Spermidine source: The yogurt LKM512 has enough spermidine in it to cause mice that eat it to live much longer.
I recently received some LKM512 yogurt starter culture from Japan and made yogurt/curds with it. It has a mild taste, and I cannot gauge the amount of spermidine it contains from smell.
The path to get the LKM512 spermidine containing yogurt is
1) search "LKM512" at amazon japan (amazon.jp)
2) find the light blue box with the number 30 on it.
3) then have a person from http://www.fiverr.com send it to you from Japan. Amazon will not ship it to US.
I had fast professional affordable results with Analema from fiverr. https://www.fiverr.c...34-b16ed5aa02c5
So there is your 1 or 2 email spermidine source. You can start more yogurt from previously made yogurt so you will not need all 30 units, but it is about $37 for 30 units.