Jim:
To follow up on a recent post: According to canning sources, it is the Vitamins A, C, B1, B2 that are the most susceptible to degradation over time with 33%- 50% losses immediately upon canning and additional losses of 5-20% per year (based on storage conditions). Let us look at best (33% loss at canning and 5% per year ) and worst case (50% loss at canning and 20% per year) losses per year for five years.
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Percentage of Remaining Vitamins:
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| Storage Period | Best Case | Worst Case |
| Year One | 62.7% | 40% |
| Year Two | 59.5% | 32% |
| Year Three | 56.6% | 26% |
| Year Four | 53.7% | 20% |
| Year Five | 51% | 16% |
Thus, under best case conditions, five years of storage. yields about a 50% loss.
Under worst case conditions a near total loss of 84% with only 16% of these vitamins remaining.
Consider these losses in your storage planning. Regards, – S.F. in Hawaii