NIFS Healthy Living Blog

Protein was once primarily associated with fitness enthusiasts and bodybuilders. It was commonly found in supplements like powders, bars, and shakes. In recent years, however, protein has made its way into mainstream marketing, and now it can be found in nearly everything—from coffee and pasta to popcorn and even soda.

The excitement around protein isn’t unfounded. This macronutrient plays many important roles in the body. Protein helps repair and build muscle tissue, supports immune health, and can help promote feelings of fullness while stabilizing blood sugar levels. However, like most things in nutrition, balance is key. Consuming too much protein may come with some unintended consequences.

First, consuming excess amounts of any macronutrient—whether protein, carbohydrates, or fat—can lead to excessive calorie intake and potential weight gain. Even if total calorie intake stays within recommended ranges, prioritizing protein at the expense of carbohydrates and fats can create a macronutrient imbalance. Carbohydrates and fats serve as the body’s primary and preferred sources of energy, and limiting them too much may leave the body without the fuel it needs.

When adequate carbohydrates and fats are not available for energy, the body may begin converting excess protein into energy. This process produces urea as a byproduct, which must be filtered out by the liver and kidneys. Over time, excessive protein intake can place additional strain on these organs. The body also requires more water to eliminate this waste, which may increase the risk of dehydration if fluid intake is not sufficient.

So how much protein is too much?

While there is a minimum recommended daily intake for protein, there is no universally agreed-upon maximum for healthy individuals. Current dietary guidelines suggest that many adults benefit from consuming about 1.2–1.6 grams of protein per kilogram of body weight per day, depending on activity level and health goals.

For example:

• A person who weighs 150 pounds (68 kg) may aim for roughly 82–110 grams of protein per day.
• A person who weighs 200 pounds (90 kg) may aim for roughly 108–144 grams per day.

To maintain balance and allow room for carbohydrates and fats, a common rule of thumb is to keep protein intake at or below about 2 grams per kilogram of body weight per day.

For more individualized recommendations—especially for those with specific health conditions such as kidney or liver disease—consulting with a registered dietitian is the best way to determine appropriate intake levels.

For those looking for a quick and convenient way to support their daily protein needs—especially after exercise—this high-protein shake recipe is an easy option to try:

High Protein Espresso Breakfast Shake