Everybody on here makes their own choice, some buy it pre-filtered USP only,some get it off Amazon, some pay an arm and a leg for it off of med lab supply. There's a lot of different ways to find it, I found this stuff on Amazon and it was only 23 bucks for a quart, and it's a 60/40 ratio according to the nutritional facts label.. just depends on what you want to do, you can even buy a bottle of C8 and c10 and mix them together . I don't see the point in buying it pre-filtered because you have to filter it anyways to put it in vials, but some people might look at that differently, It all comes down to personal preference, be prepared to pay triple $ if you get it USP pre-filtered though, and if you look at the cost of .2 um filters, It cost almost nothing to filter it. I always filtered my own grape seed oil and one thing I noticed is, this stuff is WAY easier to filter, It literally pushes through a filter like water.. I've never seen a carrier oil filter that easy, back in the day I used to use a caulking gun with 60 ml syringes, and I would literally bend the handle on the gun constantly from the force it would take, this shit you can literally squeeze with your bare hand with little to no effort at all