The Most Powerful Dietary Intervention in Nutritional Science Has Been Sitting There (And Ignored By 95% Of People)

Most nutrition advice asks you to subtract something. Cut carbs, drop calories, eliminate this food, avoid that one. What if the most powerful thing you could do was just add more of one thing to your diet?

In one of the largest studies we’ve ever seen (and we’ve covered thousands), scientists found that eating more fiber meaningfully reduced your risk of heart disease, stroke, type 2 diabetes, and colorectal cancer. 

Researchers analyzed 185 prospective studies and 58 clinical trials representing approximately 135 million person-years of data, which is about as close to definitive as nutrition science ever gets. Compared to people eating the least fiber, those eating the most saw 15 to 30 percent lower rates of all-cause and cardiovascular mortality.

At a minimum, you want about 25 grams per day. Unfortunately, the average American currently eats around 15 grams. Even more staggering, data suggests that 95 percent of Americans don't get enough fiber.

You don't need a dramatic diet overhaul to close the gap. A cup of lentils and a whole avocado are both loaded with fiber. Add an apple and a handful of almonds to your current routine, and you're getting more than the average person. Pick one high-fiber food you actually enjoy and start there, and the rest gets easier. 

Or, if you need help, we developed something special to help close the fiber gap.

A Note From Arnold: We Did Something About The Fiber Gap

I've spent 60 years in fitness. I've watched this industry sell people everything from exotic superfoods and random ingredients with names nobody can pronounce, to supplements that change every three years when the trend shifts.

How many of you have wasted money on detox teas, testosterone boosters, or fat loss supplements?

Meanwhile, the most powerful dietary intervention in nutritional science has been sitting there the whole time, with too much data to ignore.

Fiber matters. It's real health, longevity, gut health, and heart protection. But it's boring. No one posts about it.

That bothered me. So we decided to do something about it. And that's why we spent the last two years building Fiber+. It’s the first and only supplement we’ve ever developed. It’s that important. 

When we partnered with Momentous to create Fiber+, I told them I only wanted to do this if we did it right. Not a basic powder in a new container. Not a product that moves things through your gut and calls it a day.

For that, you need resistant starch. It's something we first wrote about in this newsletter years ago, not long after we started, and I immediately asked Adam to look into it more.

Resistant starch is the ingredient that most fiber products are missing. It directly feeds your good gut bacteria. They eat it. I'm not the science guy, but Adam says it drives the kind of inflammation reduction and metabolic improvements that show up in your cholesterol, blood sugar, and energy.

Fiber+ actually uses three distinct fiber sources. Psyllium for immediate results you can feel — the sludge, as I call it. Resistant starch (Solnul™) to transform your microbiome. Rice bran hull for long-term protection. No artificial sweeteners. No artificial flavors. No orange flavor. 6 grams of fiber per serving.

If you're already taking probiotics, keep taking them. But understand what you're missing without fiber: you're importing healthy bacteria and giving them nothing to eat. Think of it as soil for everything already working inside you. You wouldn't plant flowers without soil.

As an APC reader, you get 35% off your first subscription or 14% off a one-time purchase. The code PUMPCLUB applies automatically at checkout.

Try Fiber+ today. We built it for you because we know your gut, and the rest of your body, will thank you.

Look. I don’t care if you actually buy the thing. If you start adding more fiber to your diet, I’m happy. And if you need an assist, we’ve created something to help. 

— Arnold

P.S. If you’re curious about how much fiber you’re consuming, we created a two-minute quiz for you. The entire APC team took the Fiber Quiz, and it was eye-opening (and we think about this stuff all day long). 

Most people have no idea what their actual daily intake looks like because they've never tracked it. Run the exercise once — just once — to find out where you're starting from.