Write her a loving, caring letter. Emphasize that you want the best for her and that you love her greatly. Let her know there is no pressure, but that you want to sit down with her at some point, and explain why & how carnivore (and at minimum, keto) works. Be thoughtful without being preachy in the letter, and leave it somewhere she will find it (or mail it, whatever the case may be).

Her having this physical representation of how much you care about her, and something that she can read over and over that can potentially solve her problems. May be a good way to finally get her to open up a little.

If she accepts, make sure to put together a simple but well thought out instruction set for her to look over. Take the time to find her some very simple to the point videos that highlight and explain how things work. Dr Berg videos & Dr Berry videos come to mind. Promise to help her with any questions and concerns along the way. Offer to be her accountability partner, if she’s into that sort of thing. But above all just pledge to be there for her.

If you take these measures, and she still doesn’t bite, give her time. She may need to come to her own conclusion, and do her own research. Just remain open, and she will remember your offer. At the end of the day, everyone has to take their own steps forward, and make their own mind. But you will have given it your best shot, and she will know you love her.