“Maxxing” Out on Balance: Getting the Most From Fiber and Protein

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First it was protein maxxing. Now fiber maxxing is having its moment.

In the case of protein and fiber, there is plenty to like about the attention they’re getting. We need protein. Most of us could probably benefit from paying more attention to fiber.

But do we really need to max out either one? Maybe what we need to max out is balance.

So, What Is Fiber Maxxing?

Unlike a formal diet, fiber maxxing doesn’t come with a particular set of rules. It’s essentially the idea of intentionally eating more fiber-rich foods throughout the day.

And there is a good reason fiber is getting some overdue attention. A commonly cited guideline is about 14 grams of fiber for every 1,000 calories consumed. You may also have seen the familiar recommendations of roughly 25 grams a day for women and 38 grams for men, with somewhat lower recommendations for adults over 50.

The problem isn’t usually that we’re failing to “max” our fiber. It’s that many of us aren’t getting enough in the first place.

That makes increasing fiber a very worthwhile goal. But there’s no prize for cramming as much as possible into a day. In fact, increasing fiber too quickly can leave you with bloating, gas, cramping and a very unhappy digestive system.

If you’ve been eating relatively little fiber, increase it gradually and make sure you’re drinking enough fluids along the way.

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Fiber Is About a Lot More Than Being Regular

Mention fiber and most of us immediately think of digestion and regularity. That’s certainly one of its jobs, but it’s hardly the whole story.

Fiber can help with blood sugar

Soluble fiber slows digestion and the absorption of carbohydrates. Instead of carbohydrate being rapidly digested and glucose quickly entering the bloodstream, adding fiber—and protein—to a meal can help create a slower, more gradual response.

That’s one reason foods such as beans are so interesting nutritionally. Yes, they contain carbohydrates, but those carbohydrates arrive packaged with fiber, resistant starch and protein.

It can help with cholesterol and heart health

Certain soluble fibers can help lower LDL cholesterol. Oats, barley, beans and lentils are particularly useful sources. Fiber-rich dietary patterns are also associated with better cardiovascular health overall.

It feeds the neighborhood in your gut

Here’s where fiber becomes much more interesting than its old reputation as “roughage.”

We don’t digest all dietary fiber ourselves. Some of it makes its way to the colon, where our gut microbes ferment it and use it as food. In the process, those microbes produce compounds called short-chain fatty acids, including butyrate. These compounds help nourish the cells lining the colon and are involved in metabolic and immune functions throughout the body.

Different plant foods provide different types of fibers and other compounds, which is why variety matters. Eating oats every morning is wonderful, but oats plus beans, berries, vegetables, whole grains, nuts and seeds gives your gut microbes a much broader menu.

Fiber can help us feel satisfied

Fiber-rich foods tend to take longer to digest and often provide considerable food volume for relatively few calories. Combine that with protein, which is also highly satiating, and something interesting happens: rather than concentrating entirely on eating less, we can concentrate on building meals that naturally leave us satisfied. It’s a much more pleasant way to think about eating than counting everything down to zero.

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Which Foods Give Us the Most Fiber?

“Eat more vegetables” is good advice, but it doesn’t necessarily tell us how to reach 25 or 30 grams of fiber in a day. Some foods do considerably more of the heavy lifting than others.

Food	Serving	Approximate Fiber
Lentils	1 cup cooked	15–16 g
Black beans	1 cup cooked	15 g
Chia seeds	1 ounce	10 g
Raspberries	1 cup	8 g
Whole-wheat pasta	1 cup cooked	6 g
Pear or Apple with skin	1 medium	5–6 g
Quinoa	1 cup cooked	5 g
Broccoli	1 cup	5 g
Oatmeal	1 cup cooked	4 g

Those numbers also show why a perfectly respectable salad doesn’t necessarily make for a high-fiber diet. Lettuce and a few vegetables contribute fiber, but adding beans, lentils, seeds, berries or whole grains can turn that meal into something much more substantial.

You don’t necessarily have to count every gram. An easier approach is to put a meaningful source of fiber into every meal and let all the smaller sources add up around it.

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But What About Protein Maxxing?

Protein has been enjoying its own moment in the nutrition spotlight—and for good reason. We need protein to maintain and repair muscle and other tissues and to make enzymes, hormones and many other substances the body uses every day. Maintaining adequate protein becomes especially important as we get older and naturally become more vulnerable to losing muscle mass.

But protein maxxing can develop the same problem as fiber maxxing. If the goal becomes simply getting the protein number as high as possible, it’s easy to end up with a day filled with meat, eggs, protein shakes, bars and high-protein dairy products—and surprisingly little fiber.

Go too far in the opposite direction and fill the day with fruits, vegetables and grains without paying attention to protein, and you can create another imbalance. Neither nutrient has to lose.

Protein + Fiber: Now We’re Getting Somewhere

Instead of asking whether we should be protein maxxing or fiber maxxing, what happens if we simply put the two together?

Eggs + oatmeal and berries. Greek yogurt + chia seeds and fruit. Chicken + beans and a chopped salad. Fish + quinoa and broccoli. Turkey + whole-grain bread and vegetables. Lentils + chicken and roasted vegetables.

Suddenly we’re building meals that provide protein for muscle and tissue, fiber for the gut and metabolic health, carbohydrates for energy, and the vitamins, minerals and plant compounds that come along with whole foods.

And something else happens. Take away the words protein maxxing and fiber maxxing and look at the foods we’ve assembled: fish, chicken, eggs, yogurt, beans and lentils, vegetables, fruit, whole grains, nuts and seeds, olive oil. We’ve more or less backed our way into a Mediterranean-style eating pattern.

Nutrition trends keep acquiring new names—protein maxxing, fiber maxxing, gut-health foods, plant diversity, healthy fats—and when we put all the good parts together, we often rediscover eating patterns that people have followed for generations. Maybe we didn’t need another extreme after all.

The Two Questions That Make This Easy

Rather than keeping a running tally of every gram at every meal, try looking at your plate and asking: Where’s my protein? Where’s my fiber? Then fill in the rest with a variety of whole foods.

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A simple mix-and-match day might look like this:

Meal	Choose a Protein	Choose a Fiber Anchor	Add Some Produce
Breakfast	Eggs, cottage cheese, Greek yogurt	Oats, chia, whole-grain toast	Berries, apple, pear
Lunch	Chicken, turkey, tuna, eggs	Beans, lentils, quinoa	Mixed salad or vegetables
Snack	Yogurt, cheese, nuts	Chia, nuts, whole grain	Fruit or berries
Dinner	Fish, chicken, lean beef, tofu	Beans, barley, quinoa, potato with skin	One or two vegetables

You don’t need every item in every column. It’s a framework, not another set of food rules.

One day breakfast might be eggs with whole-grain toast and berries. Another might be Greek yogurt with oatmeal, chia and fruit. Lunch could be a chopped chicken salad with chickpeas. Dinner could be salmon, quinoa and broccoli.

Before you know it, you’ve accumulated a respectable amount of both protein and fiber without spending the entire day doing nutrition math.

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Maybe We Don’t Need to Max Out Anything

It’s great that protein and fiber are having their moments. A reminder to put enough protein on the plate, or to reach for beans, berries, oats and whole grains more often, is a good thing either way.

But somewhere along the way, more doesn’t have to become the goal. Our bodies need protein. They need fiber. They also need healthy fats, carbohydrates, vitamins, minerals, water and the thousands of naturally occurring compounds that come along when we eat a varied diet of real foods.

Maybe the healthiest lesson to take from both trends is also the simplest.

Don’t max out protein. Don’t max out fiber. Max out the balance.

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