With the obesity epidemic at an all-time high in the US — close to 70% of Americans are overweight or obese — many people could benefit from losing weight. However, for numerous reasons, weight loss is challenging. In addition, some people are tempted to choose the “diet of the month” or a plan that they have read about online or heard about from friends and family. Unfortunately, these diets are oftentimes not the most nutritious, and even with some weight loss, may not ultimately improve health.
So, is there any benefit from improving the quality of one’s diet without weight loss? The answer is YES. Three randomized clinical trials (the gold standard in nutrition research) have shown that by improving what you eat, you can improve cardiovascular risk factors, such as high blood pressure, LDL (bad) cholesterol, and triglycerides, and improve your health.
Examining the evidence
One study examined the effect of the DASH (Dietary Approaches to Stop Hypertension) Diet on blood pressure. The researchers recruited 460 overweight and obese adults with borderline high blood pressure. They provided the participants with food according to DASH diet guidelines. The DASH diet is defined as: low in saturated fat and dietary cholesterol; rich in potassium, magnesium, calcium, and fiber; emphasizing fruits, vegetables, whole grains, and low-fat dairy products; including fish, poultry, nuts, and seeds; and limiting red meat, sweets, and sugary beverages. To prevent any effect from weight changes on the results, researchers regulated calories to prevent weight gain or weight loss. At the end of the 11-week study, the participants’ blood pressure was significantly reduced compared to their baseline blood pressure.
The second study looked at the already very healthy DASH diet and then added sodium limits. Study participants on the DASH diet who were assigned to the lowest sodium limit (1,500 milligrams per day) experienced drops in blood pressure similar to what a blood pressure medication would achieve.
The third trial examined whether changing a few components of the original DASH diet could result in even greater improvement in risk factors. This study, called OMNI Heart (Optimal Macronutrient Intake to Prevent Heart Disease) examined 164 overweight and obese adults with prehypertension or Stage 1 hypertension, and replaced some of the carbohydrates in the DASH diet with either healthy protein (from fish, nuts, beans, and legumes) or unsaturated fats (from olive oil, nuts, avocado, and nut butters). Again calories were kept neutral to avoid weight gain or loss. Results showed that substituting healthy protein or healthy fats for some of the carbohydrate lowered LDL (bad) cholesterol, blood pressure, and triglycerides even further than the DASH diet alone.
Putting it into practice
In summary, for overweight or obese people with borderline high blood pressure, following a DASH diet with a focus on daily consumption of vegetables, fruits, whole grains, low-fat dairy, nuts, and lean sources of protein could result in a reduction in blood pressure. Limiting high sources of sodium, including any canned, convenience, and processed foods, and high-sodium condiments such as salad dressing, pickles, and soy sauce, can produce even greater reductions in blood pressure. Substituting some healthy fat or healthy protein for some of the carbohydrates in your diet may improve your cardiac risk factors even more by lowering triglycerides and LDL cholesterol.
The bottom line is that for those who are overweight or obese, losing weight is not the only way to improve your health. Choosing healthy foods every day can make a positive difference.
|The DASH Eating Plan|
|Food group||Goal servings||Example of one serving|
|Vegetables||4–5/day||1 cup raw, leafy veggies or 1/2 cup cooked|
|Fruit||3–4/day||1 cup berries, 1 medium apple|
|Whole grains*||4–6/day||1 slice whole-grain bread, 1/2 cup cooked|
|Low-fat or fat-free dairy||2/day||1 cup yogurt or milk|
|Nuts, legumes, seeds||4–5/week||1/4 cup nuts, 2 tbsp. nut butter, 1/2 cup legumes|
|Oils and fats*||3/day||1 tsp oil, 2 tbsp. salad dressing|
|Fish, poultry, or lean meats||6 or less/day||1 ounce fish, poultry, or lean meat, 1 egg|
|Sweets||5 or less/week||1 tbsp. sugar, 1/2 cup sorbet|
|For an OMNI Heart eating plan: Limit fruit to 3 servings per day and whole grains to 4 servings per day, and increase healthy protein (fish, legumes, beans, nuts, nut butters) OR increase healthy fats (olive oil, avocado, nut butters, nuts).|
Bible verses for today’s meditation and inspiration: Matthew E. McLaren
“If you, then, though you are evil, know how to give good gifts to your children, how much more will your Father in heaven give good gifts to those who ask him!” – Matthew 7:11
“A cheerful heart is good medicine, but a crushed spirit dries up the bones.” – Proverbs 17:22
“Do not be anxious about anything, but in every situation, by prayer and petition, with thanksgiving, present your requests to God.” – Philippians 4:6
“Above all else, guard your heart, for everything you do flows from it.” – Proverbs 4:23
“For God has not given us a spirit of fear, but of power and of love and of a sound mind.” – 2 Timothy 1:7
“Consider it pure joy, my brothers and sisters,[a] whenever you face trials of many kinds, because you know that the testing of your faith produces perseverance.” – James 1:2-3
“In all your ways acknowledge him, and he will make straight your paths.” – Proverbs 3:6
“Commit your actions to the LORD, and your plans will succeed.”- Proverbs 16:3
“Consider the ravens: They do not sow or reap, they have no storeroom or barn; yet God feeds them. And how much more valuable you are than birds!” Luke 12:24 – Luke 12:24
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