Are high-protein diets safe? (2024)

FAQs

Are high-protein diets safe? ›

Too much protein can cause health problems, including weight

They found that while the prevailing advice for promoting good health is that increasing the proportion of protein in daily calorie intake is beneficial, consuming protein in excess not only doesn't add to the development of lean muscle but can cause unintended adverse health effects.

Consuming more protein than the body needs can cause symptoms such as intestinal discomfort, dehydration, nausea, fatigue, headaches, and more. Chronic protein overconsumption can also increase the risk of conditions such as cardiovascular disease, blood vessel disorders, liver and kidney issues, and seizures.

In conclusion, a high protein diet can be beneficial for workout, as it can aid in muscle building, increase metabolism, and help you feel full. However, there are also potential drawbacks, including the risk of kidney damage, dehydration, and nutrient imbalances.

Globally, most people exceed minimum protein consumption recommendations, but Americans and Canadians take it to another level. Despite eating more protein than any other region, Americans and Canadians eat the least amount of plant-based protein — instead, they get it from animal meat, dairy, and eggs.

Extra protein intake also can lead to elevated blood lipids and heart disease because many high-protein foods you eat are high in total and saturated fat. Extra protein intake, which can tax the kidneys, poses an additional risk to people predisposed to kidney disease.

High protein intake has been shown to significantly boost metabolism and increase the number of calories you burn. This can amount to 80–100 more calories burned each day ( 22 , 23 , 24 ). In fact, some research suggests you can burn even more.

According to the Dietary Guidelines for Americans 2020–2025 , adult males should get at least 56 grams (g) of protein and adult females at least 46 g daily. However, some research suggests that eating more than this amount may help you lose body weight and fat while retaining or even building muscle mass.

Protein adds a metabolic burden on your body, especially on the kidneys. A high protein intake for a long time can cause digestive, kidney, and bone disorders. People with a very active lifestyle can tolerate higher amounts of protein than those with a sedentary lifestyle.

What are the side effects of a high-protein diet? ›

Some high-protein diets limit carbs so much that you might not get enough nutrients or fiber. This can cause problems such as bad breath, headache and constipation. Some high-protein diets allow red meats, processed meats and other foods high in saturated fat. These foods may increase your risk of heart disease.

Can too much protein be harmful? The short answer is yes. As with most things in life, there can be too much of a good thing and if you eat too much protein, there may be a price to pay. For example, people that eat very high protein diets have a higher risk of kidney stones.

High dietary protein intake can cause intraglomerular hypertension, which may result in kidney hyperfiltration, glomerular injury, and proteinuria. It is possible that long-term high protein intake may lead to de novo CKD. The quality of dietary protein may also play a role in kidney health.

Some high-protein diets limit carbs so much that you might not get enough nutrients or fiber. This can cause problems such as bad breath, headache and constipation. Some high-protein diets allow red meats, processed meats and other foods high in saturated fat. These foods may increase your risk of heart disease.

You shouldn't eat too much protein. Eating more protein than recommended won't have health benefits and could actually cause side effects. If you eat more than 2 grams per kilogram of body weight per day, you might start experiencing symptoms ranging from GI discomfort and dehydration to kidney disease.

“Yes, there is such a thing as too much protein,” Nicholas says. “The general consensus is that two grams per kilogram of body weight is the upper limit for most adult males.” So, if you weigh 185 pounds, you shouldn't be eating more than 168 grams of protein per day.

It's hard to provide a specific answer since so much is still uncertain and the experts themselves don't agree. However, for the average person (who is not an elite athlete or heavily involved in body building) it's probably best to aim for no more than 2 gm/kg; that would be about 125 grams/day for a 140-pound person.