X-Message-Number: 26881
Date: Thu, 25 Aug 2005 00:56:59 -0700 (PDT)
From: Doug Skrecky <>
Subject: 190'th update on fly longevity experiments
This is the 190'th update of my fly longevity experiments. Average
temperature was 25.4 C during this run. Estimated maximal longevity (EML)
using the formula (363 - T*11.2) is 78 days.
Recently a pomegranate juice from POM became available in Canada.
This is a refrigerated, and hence fresher product than the
(unrefrigerated) Kambiz pomegranate paste that I had used earlier. This
run tests to see if freshness makes a difference in the longevity
results.
To my great surprise the answer to this question appears to be
negative, at least at the lower dosages. Although pomegranate paste has
repeatedly bested control longevity in the past, it had never come up
against a control, which itself tested the limit set by EML. Although
pomegranate at the appropriate dosages bested control two, it failed to
beat control one. I interpret this as implying that pomegranate probably
exerts no anti-aging effect as such, but instead can help reduce pathogen
associated mortality, and so increase the likelyhood that some (fragile)
flies can live to an extreme old age.
Run #190 Percent Survival on Day
supplement 13 23 30 40 47 56 66 76 83
________________________________________________________
control one 100 100 100 100 80 40 20 20 0
control two 83 75 58 42 33 8 0 - -
pomegranate juice 10% 62 39 46 23 15 8 0 - -
" 20% 100 70 60 60 50 20 10 0 -
" 40% 100 90 80 70 70 50 30 10 0
" 100% 100 100 100 86 57 0 - - -
pomegranate paste 1/2 tsp 100 100 100 90 90 20 0 - -
" 1 tsp 100 100 100 88 63 38 25 0 -
" 2 tsp 100 100 63 25 13 0 - - -
" 4 tsp 100 83 50 50 0 - - - -
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