Dave Asprey

So as I was writing my big longevity book, which is called Superhuman,

I added a bunch of different prebiotic fibers to my diet and I measured and I quadrupled the amount of bacteria and the types of bacteria in three months.

So there's an argument for prebiotic fiber.

There's also an argument that says if you don't eat any prebiotic fiber, it'll shift your gut bacteria so they make less toxins.

That's kind of a fringe argument.

It makes sense and I've seen it work for some people, but my recommendation now is you want 20 to 40 grams of soluble fiber unless you have bacterial overgrowth in your gut.

Oh, a high-fiber diet is always going to wreck you because they're giving you Metamucil and basically ground up sticks and twigs and sawdust.

And, of course, you're going to be farting all the time.

Studies show like 17 times more vegans fart than people who eat normal food.

So, oops, sorry about that, vegans.

But, okay, so high-fiber diet is going to make you feel bloated, it's going to make you feel uncomfortable, and it's going to have less energy in it, and it's going to suck minerals and fats from your body.

Don't do that.

High-soluble fiber, you can do that, and it's going to make more beneficial fatty acids in your gut.

Never do a high-fiber diet with grape nuts and all that kind of stuff.

It's just a bad idea.

So you don't eat whole wheat.

If it's not working, you probably need digestive enzymes.

So as we age and as we don't have enough salt, we make less stomach acid.

And stomach acid's job is to sterilize the food and break it down, and then we need enzymes to absorb it fully.

So if you're farting all the time, especially if it smells like death...