I've noticed something going on with this topic that might make your advocacy even more impactful: Psychological resistance.

I've noticed those with chronic conditions are very sensitive to suggestions, especially that a diet might "fix" them. One friend went trough prolonged trauma as a child with feeding tubes and powder diets that "would cure them", and is totally blocked mentally on the topic.

Some research on your part and sharing with your audience on how and in what manner to actually bring this up might help.

Tone, wording, motivation, outcome.

It's likely many of us share and can share dozens of videos and books on what seems completely logical to us, but the sick are often "addicted" to their habit of sickness.

The human mind has a way of identifying with its faults:

"I'm the person who eats twinkies everyday, just as i wanted to as a kid",

"MS is a genetic disease, there nothing i can do about it, this is my life now"

or whatever issue, becomes their personality.

So by going up to someone digitally or in person and telling them that this thing they have spent countless hours for doctor visits, family worry and money on medical bills about, can be cured by eating a steak....you would think is good news, but the psychology of communication informs it will actually be received as an attack.

Compassion and patience, because we don't have all the answers either. Today we might be excited about the obvious truth that our bodies are not designed to digest plant matter, but even deeper truths might escape us as those basic ones escape our friends and family.

Truths such as that raw meats and eggs, especially organs contain more nutrition than cooked muscle meats. Raw meats are absorbed by the digestive tract not so much "digested" as with plants or denatured proteins (i.e cooked meats).