It's a foldable tyre, so I would fold it into an old shoe box and keep it in your garage as a spare. It will probably be good for at least two years.
I'm not expecting you to get a bad cut on one of your tyres, but I once hit a large, jagged, rock on a Pyrenean descent at around 45mph. (I was following someone, so saw it really late and couldn't swerve it.) It cut the tyre to the casing, causing the inner-tube to partially bulge. It was in the middle of nowhere, but this being a Vittoria tyre I was able to ride, slightly more carefully than normal, 25 miles to where we were staying and change the tyre in the hotel garage.
The good people at Vittoria have taken the decision away from you now Graham. Only the bottom tyre of the road range, the Zaffiro which is non-folding, are available without Graphene.
As for taking Omega 3 and Turmeric for joints or eating oily fish, there may not be clear evidence to support it, but there is some for general health which is enough for me.