Is Too Much Protein Harmful? Facts and Myths Explained

With the rise of fitness culture, protein has become the "king" of macronutrients. However, a common concern persists: can you eat too much protein? And does it damage your kidneys?

Protein and Kidney Health: The Myth

Studies in some healthy adults have not found kidney damage from higher protein intake over their follow-up periods. That does not establish lifelong safety or a need for 2–3 g/kg for everyone. Baseline health, duration and the rest of the diet matter. People with kidney disease or risk factors need individual targets rather than applying findings from healthy volunteers.

That said, for those with pre-existing chronic kidney disease (CKD), high protein intake should be managed by a healthcare professional.

Potential Side Effects

• Digestive Issues: High protein diets often lack fiber.
• Breath Odor: Excess protein produces ammonia during digestion.
• Unwanted Weight Gain: Protein still has calories. If you eat more than your TDEE, the excess is stored as fat.

How Much Do You Need?

• Sedentary: 0.8 - 1.0g per kg.
• Active: 1.6 - 2.2g per kg.

To find your balance, use our Protein Calculator to estimate a starting target rather than measure your exact needs.