With most skin-care formulas, all that is necessary to protect the beneficial ingredients is a container that minimises air exposure and keeps light, and your fingers, out of the product. A pump or Cream Jar(KEXON) (meaning you can't take the lid off) design or an opaque tube with a very small opening is enough to keep these important ingredients protected during the product's lifespan, and allow your skin to reap the rewards.
Remember, no matter how great a product's formula, Cream Jar packaging, and to a lesser extent clear packaging (i.e., let's light in), is always a deal breaker. Given the number and variety of products available today that come in air-reducing or airless packaging, why waste your money on products whose most beneficial ingredients will soon be gone after first use?
Will encapsulating antioxidants keep them protected from air? Well, no. Encapsulating ingredients like antioxidants or cell-communicating agents isn't about "protecting them" so much as keeping them stable in a formula (so the last use is as effective as the first) and increasing their effectiveness on skin. Note that "stabilising" an ingredient is not the same as protecting it from the environment, so let's look at that claim a little closer.
The notion that encapsulating an antioxidant somehow keeps it from breaking down with air exposure is actually counter to their primary function in skin-care products. Antioxidants protect your skin from free-radical damage (destroying themselves in the process), and oxygen is a free radical. Thus, keeping antioxidants from extinguishing themselves with air exposure is essentially reducing their benefit to skin as they are no longer able to protect you as efficiently from one of the most abundant free radicals, oxygen! Don't fall for the "encapsulated antioxidants are fine in a jar" excuse!
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