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this really bothered me

95% of people aren’t making this dead-simple dietary change.

Arnold Schwarzenegger <[email protected]>

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Tuesday, September 8, 2026

Arnold's Pump Club promotes the importance of adding fiber to one's diet, citing a large study that found eating more fiber reduces the risk of various diseases. They highlight that most Americans do not get enough fiber, but suggest simple additions to one's routine can help close the gap. The brand also mentions developing something to help with the fiber gap.

Read this email as text

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.

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