The 1 diet rule you must follow

You’ve probably heard that losing weight requires just the right formula.

You know, a formula requiring you to track:

  • calories
  • saturated fat
  • unsaturated fat
  • sugar
  • salt
  • carbs
  • protein

Exhausted yet?

I know. There are just too many things to think about.

But a new study finds that it may NOT have to be all that much work. You may, in fact, be able to put aside all that counting and lose weight by adding just 1 thing into your eating plan. 1

Want to know what it is?

Let’s take a look at the study to find out.

Researchers funded by the National Heart, Lung and Blood Institute split 240 overweight folks into 2 groups.

Group #1 was told to follow the American Heart Association’s diet plan, monitoring carbs, protein, saturated and trans fats, cholesterol, sugar, sodium and alcohol. They were encouraged to eat more fruit, vegetables, whole grains and fiber; choose lean animal proteins and plant proteins; and eat fish at least twice weekly.

Group #2 was told to eat at least 30 grams of a certain nutrient a day. That’s it.

After a year, Group #2 lost almost as much weight as Group #1.

Yes, even though they focused on only 1 thing, they still lost almost as much as the group who had to keep track of multiple rules.

So what is this magical nutrient that allowed Group #2 to forget about all the other rules and still lose weight?


Yup. Good old fiber.

Fiber factoids

It’s incredibly important for your health, and helps you lose weight, for several reasons. Fiber is a type of nondigestible carbohydrate. Unlike most carbs, the body can’t break down fiber into sugar.

Instead, fiber passes through the body undigested. It adds bulk to your diet and makes you feel fuller faster, so it helps curb hunger, which enhances your weight-management efforts.

There are 2 types of fiber:

  • Soluble fiber dissolves in water. Foods high in soluble fiber, such as oatmeal, nuts, beans, lentils, flaxseed and apples, can help lower glucose and cholesterol levels.
  • Insoluble fiber doesn’t dissolve in water. Foods high in insoluble fiber, including whole grains and vegetables, can help move food through your digestive tract, promoting a healthy, er, constitution.

Both are crucial to get. And Americans don’t get nearly enough. The U.S. National Academy’s Institute of Medicine recommends 25 grams and 38 grams of fiber per day for women and men aged 18–50 years, respectively.

America’s average intake? Only about 16 grams per day.

Pretty pathetic.

So let’s change that here and now. A few hints to increase your fiber intake:

1. Start slowly. Adding too much fiber to your diet too quickly can cause gas, bloating and cramps.2

Consider adding about 5–6 grams of extra fiber each week until you are at the recommended intake. This will allow the body time to adjust to the higher level without you doubling over in pain.

2. Drink extra water. When you boost your fiber intake, drinking plenty of water (about 8 cups per day) will help you avoid constipation.

3. Choose fiber-rich foods.

  • Instead of juice, go for the whole fruit or veggie, which is packed with fiber.
  • Read food labels for fiber content.
  • Add an extra serving of beans or veggies.
  • Choose RealDose RealReds at snack time. RealReds not only packs a generous 6 grams of fiber per serving, it also provides the polyphenol phytonutrient equivalent found in 6 servings of whole fruits.
  • To get you going, here are a few fiber-rich foods and their fiber content.
Rich Sources of Fiber
Food Fiber (grams)
RealDose RealReds, 1 serving 6
Black beans, ½ cup 8.3
Pinto beans, ½ cup 7.6
Navy beans, ½ cup 6.7
White beans, ½ cup 6.3
Kidney beans, ½ cup 5.5
Fruits & Veggies
Artichoke, cooked, 1 medium 10.3
Blackberries, 1 cup 7.6
Green peas, ½ cup 4.4
Apple (with skin), 1 medium 4.4
Orange, 1 medium 3.0
Strawberries, sliced, 1 cup 2.9
Parsnip, ½ cup 2.8
Carrots, raw, ½ cup 2.8
Spinach, cooked, ½ cup 2.2
Apple (without skin), 1 medium 2.1
Corn, ½ cup 2.0
Cabbage, raw, ½ cup 1.1

Hmmm. Maybe the formula for losing weight ISN’T so complicated after all!

Steve Sisskind, M.D.

Hi, I'm Dr. Steve Sisskind, Chief Medical Officer & Founder at RealDose Nutrition.

As a young physician, I struggled because my patients came to me with serious health issues, but I didn't have the right tools to help them. Medical school taught me how to put "band aids" on their symptoms with drugs and surgery, but not how to address the root causes of their problems.

Years later I discovered a better approach... based on the fundamental idea that the power of nutrition can transform your health and vitality. But there's a lot of confusion... What foods should I eat? Which supplements should I take? What does the science say?

I have dedicated my life to answering these questions... And I share this knowledge with you every day here at RealDose Nutrition.

I invite you to connect with me by joining my free private community. I've helped thousands of people and I know I can help you too!

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References:1. Ma Y, Olendzki BC, Wang J, et al. Single-component versus multicomponent dietary goals for the metabolic syndrome: a randomized trial. Ann Intern Med. 2015;162(4):248-57. PMID: 25686165.

2. King DE, Mainous AG 3rd, Lambourne CA. Trends in dietary fiber intake in the United States, 1999-2008. J Acad Nutr Diet. 2012 May;112(5):642-648. PMID: 22709768.

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  1. The article addresses the amount of fiber for ages18-50 is the amount the same for someone in their 60’s ?

    • Dr. Steve Sisskind

      Hi Vicki,

      Thank you for writing in and for sharing your concerns with us! Yes, we recommend a daily intake of 30 grams of fiber every day for most healthy individuals. However, if you have digestive or gastric issues, it would be best to speak with your personal doctor as your needs or usage may need to be adjusted accordingly. Make it a healthy day!

  2. An interesting article, and this information should be discussed more often. I am surprised that the level of fibre in the listed fruits is not higher. Blackberries is the exception.

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