Well . . .my son in law was given rations from the Korean War when he was in the Vietnam War . . .! My worry is that the preservatives change over time. We are always told that pesticides can get stronger and more dangerous. Hard to know what to believe.
There are some things I will use past a "best by" date. With food I generally use my judgement.
I am cautious about other things especially medications. I am probably a bit complacent about sunscreen and will check from now on.
I am flat out finding dates on products at times. They can be very hard to see, and my eyes don't see as well as they once did. I can hardly distinguish shampoo from conditioner when I am in the shower let alone read use by dates.
I use my common sense,my eyes and my nose where food items are concerned!!! I don't have use by dates on stuff I grow myself at all,so I do not need them on many of the items I see for sale! I always remember my dad telling us as kids how soldiers during the war ate rations which could be up to 4 and more years old,and it certainly was not these items which ended up being detrimental to their well-being!! Chocolate,in particular ,even if it goes white, is still edible after many,many years! And as for jams and pickles? They are not called 'Preserves' for no reason!!! We would make all our own delicious preserves when we had too much of anything,and it would last indefinitely as long as the jars were sterile and sealed properly!! No! I take little notice of the Use By dates which are such a huge part of the commercial world of Foodstuffs these days. With make-up,I don't wear it,so this does not affect me,though I would be wary with items such a mascara where the little brush goes in and out of its tube so many times,collecting bacteria on these journeys. I can imagine many eye infections would be caused by such items!! Where sunscreen is concerned,I do not know enough about this sort of thing.I am allergic to the main ingredients anyway,so again I do not tend to be affected by these items which I don't use. I think it is sensible for all of us to use our own common sense and do some research if in doubt about anything.
Depends what it is. If its fresh dairy, no, but long life is fine after checking for smell. Tinned food I've also kept - like tomatoes for cooking but cereals do become softer and can taste like cardboard so they are binned.
I only keep past-date food if it's by accident, as in stuffed in the back of the fridge or pantry. As soon as I notice the date, it's in the bin. Other things like medication or other such stuff, I will usually keep it past date, but I inspect it for any signs that the product turned before each use.
No, not even sunscreen. I used some old makeup once, a few years ago, with no date on it of cause, & I came out with a huge rash over my face. I had to go & see a Dr, in the suburb I was visiting that day. The rash went away, & I throw out the makeup when I got home, so since then I've check all the dates on everything in the bathroom cabinet & thrown them out when they become out of date!