Is 150 Grams of Protein Too Much? Here's What the Research Says
Short answer: For active adults weighing 75–93 kg, 150g of protein per day falls right in the evidence-backed optimal range of 1.6–2.0g/kg. It is neither excessive nor universal. Whether 150g is right for you depends entirely on your body weight, activity level, and goal. For lighter or sedentary individuals, 150g exceeds their needs — but is not harmful to healthy kidneys.
Key Takeaways
- 150g of protein is optimal for active people weighing 75–93 kg at a 1.6–2.0g/kg target.
- For lighter or sedentary individuals, 150g exceeds their needs — though it remains safe.
- High protein diets (including 150g) are safe for healthy adults with no kidney disease.
- Context — body weight, activity level, and goal — determines whether 150g is right for you.
The Optimal Protein Range Explained
The research on protein requirements for active adults consistently points to a range of 1.6–2.2g per kilogram of body weight per day as optimal for muscle maintenance and growth. This range, supported by the International Society of Sports Nutrition (ISSN), the American College of Sports Medicine (ACSM), and numerous meta-analyses, reflects what is needed to maximize muscle protein synthesis above the basic deficiency-prevention RDA of 0.8g/kg.
At 150g per day, you can calculate whether this is optimal by dividing 150 by your body weight in kilograms. The resulting g/kg ratio tells you where you fall:
- If the result is 1.6–2.0g/kg: 150g is in your optimal zone
- If the result is below 1.6g/kg: 150g is at the low end for you — consider increasing
- If the result is above 2.2g/kg: 150g exceeds what research shows is needed, though it is not harmful
Who 150g of Protein Is Right For
The table below shows for which body weights and goals 150g falls into the optimal, sufficient, or excessive category:
| Body Weight | Goal | 150g = X g/kg | Assessment |
|---|---|---|---|
| 65 kg (143 lbs) | Muscle gain | 2.31g/kg | Slightly above optimal — fine |
| 70 kg (154 lbs) | Muscle gain | 2.14g/kg | Upper optimal range — good |
| 75 kg (165 lbs) | Muscle gain | 2.0g/kg | Optimal for muscle gain |
| 80 kg (176 lbs) | Muscle gain | 1.875g/kg | Optimal sweet spot |
| 85 kg (187 lbs) | Muscle gain | 1.76g/kg | Optimal range |
| 90 kg (198 lbs) | Muscle gain | 1.67g/kg | Good baseline for muscle gain |
| 95 kg (209 lbs) | Muscle gain | 1.58g/kg | Low end — consider 160–170g |
| 70 kg (154 lbs) | Fat loss | 2.14g/kg | Excellent for fat loss muscle retention |
| 80 kg (176 lbs) | Fat loss | 1.875g/kg | Good for fat loss |
| 60 kg (132 lbs) | Maintenance | 2.5g/kg | Exceeds maintenance needs |
As the table shows, 150g is optimal or near-optimal for active individuals in the 75–93 kg range targeting muscle gain. For fat loss, where protein needs are elevated, 150g serves well for those up to 80 kg.
Who 150g May Be Too Much For
150g of protein exceeds the evidence-based optimal range for:
- Sedentary individuals under 80 kg: someone weighing 60 kg with no exercise has an optimal target of around 72–96g per day. 150g is over double their actual need.
- Lighter women (50–60 kg) with low activity levels: optimal targets for this group are typically 65–100g. 150g is achievable but not necessary.
- Children and adolescents: protein needs for younger individuals are calculated differently. 150g would be excessive for most children and many teenagers.
The important nuance is that exceeding the optimal range at 150g is not dangerous for healthy adults — it simply represents diminishing returns. Excess protein above optimal needs is metabolized and used for energy or converted to glucose. It does not build extra muscle above what training stimulates.
Is 150g of Protein Safe?
For healthy adults without pre-existing kidney disease, 150g of protein per day is safe. The concern about high protein and kidneys originates from research in people with pre-existing kidney disease, where reducing protein intake is sometimes therapeutic. This finding should not be generalized to healthy individuals.
A 2016 study by Antonio et al. published in the Journal of the International Society of Sports Nutrition followed trained athletes consuming 2.5–3.3g/kg of protein (well above 150g for most) for a year and found no adverse effects on kidney function, blood markers, or body composition beyond expected changes from training.
Additional safety context: the liver processes excess amino acids, and healthy kidneys excrete the resulting urea without issue. Adequate hydration supports this process. There is no meaningful safety concern at 150g for a healthy adult. For a thorough look at the safety data, read our guide on can too much protein be harmful.
How to Hit 150g Per Day
If 150g is your target, distributing intake across 3–4 meals makes it practically achievable. A simple framework:
- Breakfast: 35–40g (e.g., 4 eggs + Greek yogurt = ~38g)
- Lunch: 40–45g (e.g., 150g chicken breast + cottage cheese = ~45g)
- Dinner: 45–50g (e.g., 200g salmon + lentils = ~48g)
- Snack: 20–25g (e.g., protein shake or tuna = ~25g)
For a detailed day-by-day meal plan at 150g, see our practical guide on how to hit 150g of protein per day. To confirm whether 150g is actually your right target, use our protein intake calculator with your exact body weight and activity level.
Is 150g the Right Number for You?
Enter your body weight, activity level, and fitness goal to get a precise, personalized protein target — not a one-size-fits-all number.
Frequently Asked Questions
Is 150 grams of protein a day too much?
For most active adults weighing 75–93 kg, 150g falls in the optimal 1.6–2.0g/kg range. It is not too much for this group. For lighter or sedentary individuals, 150g exceeds their needs but is not harmful to healthy kidneys.
Is 150g of protein too much for a woman?
It depends on body weight and activity. For a highly active woman weighing 75 kg or more, 150g is appropriate. For a lighter sedentary woman, 150g exceeds her optimal range — though it remains safe for healthy kidneys.
Can eating 150g of protein damage kidneys?
No evidence supports kidney damage from 150g of protein in healthy adults. Major research reviews confirm high protein diets are safe for people with healthy kidneys. Those with pre-existing kidney disease should follow their doctor's guidance.
How do I know if 150g of protein is right for me?
Divide 150 by your body weight in kg. If the result is between 1.6 and 2.0, 150g is in your optimal range. For a more precise recommendation, use our free protein intake calculator.