How long does the oil concentrate last? Also, I've been ordering the same kind of E from your company for over 16 years. It looks like the same product as what you seem to be promoting as new here on your website: The Mixed Tocopherols Concentrate. What is the difference from my bottle and yours? To answer your question – the OIL product is the exact same MIXED TOCOPHEROLS oil that comes in the capsules you normally buy. If you have no difficulty swallowing capsules and are happy with the product you have been ordering all these years, you may want to keep buying the capsules. We developed the OIL in the pump bottle for use as a TOPICAL (so people do not have to cut open our capsules to apply to skin), and for vegetarians, people who do not wish to swallow a capsule, and for smaller adjustable dosing for children and pets. There is the equivalent of 24 capsules in the 1oz bottle.