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James Smith Protein Calculator – How Much Protein Do You Really Need? (No-BS Guide)

Protein gets more misinformation than any other macronutrient. Here's the no-BS truth.

Protein gets more misinformation than any other macronutrient:

  • "Too much protein damages your kidneys."
  • "You only need 50g a day."
  • "Women don't need high protein."
  • "More protein = more muscle."
  • "You can't absorb more than 30g at once."

All nonsense.

Here's the truth — the no-BS, James Smith style truth:

Protein is the most important macro for fat loss AND muscle gain. And most people massively under-eat it.

Why Protein Matters More Than Any Other Macro

Most people care about:

  • A flatter stomach
  • Muscle definition
  • Strength
  • Fat loss

But they focus on carbs, fats, meal timing… Meanwhile, their protein intake is terrible.

Here's what happens when protein is too low:

  • You lose muscle during a diet
  • You stay hungry all day
  • Cravings increase
  • Recovery is slower
  • Training performance drops
  • You look "skinny fat" instead of lean

Now the reverse — when protein is high:

  • You stay full for hours
  • Training improves
  • Metabolism stays higher
  • Muscle stays (or grows)
  • Fat loss is easier
  • You look physically better

Protein is the foundation. Everything else is secondary.

The Perfect Protein Target (Science-Based, No BS)

Forget the old-school "eat 1g per lb" bro-science.

The modern research is clear:

Daily protein: 1.6–2.2g per kg bodyweight

(or 0.7–1g per lb)

Body WeightProtein Target
55 kg90–120g
60 kg100–130g
70 kg115–150g
80 kg130–170g
90 kg145–190g
100 kg160–220g

The James Smith Protein Calculator automatically calculates the right number for your goal: Fat loss, Maintenance, or Muscle gain.

Protein for Fat Loss (The No-BS Answer)

Fat loss is NOT just about calories. It's about losing fat, not losing muscle.

If protein is too low during a calorie deficit:

  • You lose muscle
  • Your metabolism slows
  • You burn fewer calories
  • You feel weak, flat, and tired

This is why high-protein diets always work well for fat loss.

Fat Loss Protein Target:

2.0–2.2g per kg bodyweight

More protein = better hunger control, better fat loss results.

Example for 70 kg person:

70 × 2 = 140g protein

Easy and sustainable.

Protein for Muscle Gain (Yes, It's Lower Than You Think)

Building muscle does NOT require ridiculous protein.

You DO need enough — but more is not better.

Muscle Gain Protein Target:

1.6–2.0g per kg

That's it.

Why lower?

Because your body is in a calorie surplus, which already supports muscle growth.

"Can You Absorb Only 30g Protein Per Meal?" (No-BS Science)

This is one of the biggest myths in nutrition.

  • You can digest ANY amount of protein you eat.
  • Your body uses it over several hours.
  • There is no limit per meal.

The 30g myth has been debunked many times.

If you eat 60g of protein in a meal, your body does NOT flush the rest. It digests and absorbs it slowly.

Best Sources of Protein (Real Food, Not Supplements)

Animal Proteins

  • • Chicken
  • • Turkey
  • • Eggs
  • • Lean beef
  • • Greek yogurt
  • • Fish (salmon, tuna, cod)

Plant Proteins

  • • Tofu
  • • Lentils
  • • Beans
  • • Chickpeas
  • • Edamame
  • • Seitan

Supplements

Whey or vegan protein powders are fine — but not required.

The No-BS Summary

If you want a better body:

  • Eat more protein
  • Hit your daily target
  • Stop obsessing over carbs
  • Use the James Smith Calculator for accurate numbers
  • Be consistent for 8+ weeks

Your hunger drops. Your strength goes up. Your physique improves. Protein works.

Ready to Calculate Your Protein Target?

Use the James Smith Calculator to get your personalized protein target in seconds

Calculate Now

FAQs

How much protein should I eat per day?

1.6–2.2g per kg bodyweight depending on your goal.

Is high protein bad for kidneys?

No. Only an issue for people with pre-existing kidney disease.

Can women eat high protein?

Yes — women benefit from high protein even more than men.

What if I can't hit my protein goal?

Add Greek yogurt, a protein shake, or more lean meats.

Is 30g the max protein you can absorb?

No. You can absorb far more. The 30g myth is incorrect.