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A Freyd category consists of two categories C and K with an identity-on-objects functor J: C → K, where: - C has finite products - K is symmetric premonoidal (with a functor ⊗ z ) - J maps finite ...
Not all vitamin C serums are created equal. One of the most effective forms of vitamin C is L-ascorbic acid. Read more to learn the benefits and which serums to buy on any budget.