I got Mercola's junkmail...it's pure scaremongering! I used to read them with interest - but then i used to dread them appearing in my inbox. Most of the content is to induce fear about illness and comfort offered by the pushing of his products to 'save you' from the fear! About 5% would be informative info. But the package selling technique he has puts me off completely.
I agree Vit C from lemons are better than supp. vit C.
I would also juice the skins - the juice doesn't keep as long but it's certainly a punchier taste!