I found a website that helps you choose the best brand/type of CBD oil for you. Here is the link for the site https://www.cbdoilusers.com/cbd-oil-buyers-guide/. If you scroll down to the line of the do's and don'ts you will find this " Click Here To See Our List of Recommended CBD Hemp Oil Brands" in green. If you click on this it will give you the different brands to comparison shop for the best brand for you. I hope this helps some.

I love it...It has helped tremendously with my Fibro pain...Not as much for the RA...I have tried three different sources: Enlita Farms, GreenRoads, and Lazarus Naturals....Prices vary and it is good to do a lot of research....Tinctures tend to come in bottles of 250 ML and up....But keep in mind, what the number on the bottle represents is how many TOTAL MLs of CBD are in the bottle, not how many you are getting in a dose....I find that high potency CBD tinctures work best for me...I need 25-30 ML of CBD a day to touch my pain...

I also carry gummy edibles..They are expensive, but offer a quick and precise dose :)

Good luck in your research :)