For what purpose? If others are skeptical or apathetic, don't make their choices your business. As much as it hurts to see people you care about making mistakes, often there's nothing you can or should do about it.

I think it's curious that you tagged this question with "evangelism" because you are essentially talking about "making disciples" or not, right?

If people are genuinely curious and interested, then I suggest that you invite them over to cook and eat with you. Once they see that paleo meals can be delicious and satisfying, they might begin to want to know more. Then you can give them reading materials that confirm that the yummy meal was indeed healthy! But ultimately, I find that offering paleo food that's tasty and satisfying is the best first course of action. Then hit them with the research.

Yes, interesting question. We have this problem in our family. Step-daughter has what we believe to be Chronic Pain Syndrome, yet will do NOTHING but take drugs to try to manage. She will not even entertain the notion that ketogenic diets do, indeed, have an effect on migraine, and other problems that she has. Can't go there anymore. It's a waste of our time, even though she can see our results. To make matters worse, her "religion" says to eat grains in abundance and meat sparingly. Oy!

I tell them that this is what works for me, and explain all the changes I've experienced. However, I also tell them that it's not for everyone. If you do it wrong or half-way, you can really end up damaging yourself. I point them to some of the excellent resources on the web that will help them get started in the same way I did.

I've learned to just say that I'm on a doctor prescribed diet. If they ask for details I tell them no processed foods and no grains. (This is actually true, as one of my docs is Dr Westman) Hearing it's MD prescribed seems to limit the criticism. What I get most often is...."oh do you have celiac" and when I say no, I sometimes get confused looks.

I think it's extremely important that we remember to respect the lifestyle decisions of others. It's natural to want to tell the whole world about this amazing new lifestyle we've found and how much better we feel and how YOU can do this too! It's one thing if people ask about your diet and you respectfully explain how you've changed your eating, etc. Otherwise, I say just don't talk about it. And I live with two vegetarians. If they ever ask, I'll tell them. But for now, whatevs. Different strokes for different folks.

I have found it is slippery slope that can get you into preachy waters quick. I usually just show the results and point to the websites. If they come back a good talk begins.

No one here is interested in doing without carbs. I make the simple statement that I cut out all carbs and their faces go blank. I just do my thing and let them continue doing their thing.

If I sense the person has a genuine interest and will listen with an open mind, I will carefully explain why I eat the way I do. To those who ask but are closed minded or just think I'm weird I say I eat this way because it's a religious choice. Then when they ask what religion I say "Atheist".

Trying to convert others is a no-win situation. Take responsibility for your own choices and lead by example. Most people just aren't interested in a thoughful approach to diet and exercise (or a thoughtful approach to anything for that matter).