That's a great find that someone actually is putting it in a commercially available product, but unfortunately 0.5mg is a very small quantity. I haven't looked at all the studies and applied the proper scaling factor to get to a human dose, but I'm thinking several 10's of mg at least. I think @Turnbuckle is taking 30mg/day if memory serves.
I wonder if that company would be interested in selling it as a stand alone supplement in a higher dose.
Actually, I was using that much about once a week, but I haven't used it in a while. The best way to deliver it, in my opinion, is dissolved in water in a dropper bottle. The smell is not objectionable that way, and it has almost no taste if dissolved in fruit juice, preferably grapefruit juice. There's another chemical even better for inducing mitophagy--CCCP (carbonyl cyanide 3-chlorophenylhydrazone). CCCP is a strong promoter of mito fission, even stronger than spermidine, which allows defective mitochondria to be recycled into lysosomes. See Fig 2e in this paper.
CCCP extends lifespan of C. elegans--
C. elegans longevity pathways converge to decrease mitochondrial membrane potential.
Furthermore, lifespan can be significantly extended with the uncoupler carbonylcyanide-3-chlorophenylhydrazone (CCCP)...
CCCP is not outrageously expensive, but has the same retail availability problem as spermidine. As it interferes with ATP synthesis, daily use would be toxic, while intermittent use could be useful. More recently I've been using the NAD precursors nicotinamide + ribose, which also reduces ATP synthesis in large doses and promote fission and mitophagy. These supplements are very safe when used intermittently, and very inexpensive--
Edited by Turnbuckle, 11 September 2017 - 04:37 PM.