"Access to this site is permitted for registered users only. Unauthorized access to confidential, proprietary, and/or written material in this area is a violation of U.S. federal law." - yeah right!
Useful, sure - but "invaluable"?
Sure, now the NSA can have records of my heart rate in addition to the GPS locations of both myself and the woman I am having an extramarital affair with.
Having the latest information is always so important. You can learn that salt is bad, then you can know when they figure out that salt isn’t really bad. Same with fats. You can learn that butter is bad for you, use margarine instead, then when they find out that transfats are bad, you can switch back to butter. You can learn to avoid sugar, and then you can find out that high-fructose corn syrup is bad, and that sugar is much better for you. You can find out that aspirin is a blood thinner, and switch from aspirin to Tylenol. Then when you find out that Tylenol damages your liver, you can switch to Ibuprofen. Later, when you learn that Ibuprofen is implicated in erectile disfunction, you can switch back to aspirin.