To conduct my semi-scientific experiment, I bought two of the most popular brands of edible UV protection on Amazon: Heliocare, which brands itself as a dietary supplement that "promotes younger looking skin" and "helps maintain the skin's ability to protect against sun-related effects and aging," and Sunsafe Rx, which promises to "defend against both UVA and UVB rays" as long as you take it up to one hour before sun exposure.
I immediately note that the discreet and seemingly incredibly important disclaimer Heliocare provides on its Amazon listing -- "Heliocare is not a sunscreen and should be used in addition to topical sun protection" -- doesn't appear on the physical packaging. Meanwhile, Sunsafe Rx, whose suffix is inherently misleading, includes a pamphlet within its packaging that repeatedly swears that the product is as scientifically proven as it is revolutionary, claims that are definitely, definitely not untrue. The bottle also boasted "natural defense from within," which sounded like a rejected tagline from a Crouching Tiger, Hidden Dragon sequel. But I still popped the pills.