How Much Protein Do You Need Per Day? Honest 2026 Guide

How Much Protein Do You Need Per Day? The Honest 2026 Guide

By NUDAY Editorial · Reviewed by NUDAY Research Team · Last updated May 2026

"How much protein do I need?" is one of the most-asked nutrition questions on the internet — and most answers either undersell it (sticking with the outdated 0.8g/kg figure) or oversell it (claiming you need 300g a day).

The honest answer sits in a wide, defensible range that depends on your body weight, activity level, age, and goals. This guide gives you the actual numbers, a calculator table you can use today, and the deeper truth about protein sources, timing, and what to do if you can't hit your target through food alone. Every claim is sourced to published research.

How much protein should you eat per day?

Daily protein needs range from 0.8g per kg of body weight (the absolute minimum for sedentary adults) to 2.2g per kg (for active people building muscle), with most active adults sitting in the 1.6–2.0g per kg range.

The 0.8g/kg figure is technically a minimum to prevent deficiency — it represents the floor of what you need to not develop protein malnutrition, not the optimal amount for performance, body composition, or healthy aging. According to a 2017 International Society of Sports Nutrition position stand, "for athletic individuals, daily protein intakes should range from 1.4 to 2.0g per kg of body weight." Newer research published in 2021 in the Journal of the International Society of Sports Nutrition goes higher — up to 2.4g per kg — for individuals in calorie deficit trying to preserve muscle.

The TL;DR — most active adults should aim for somewhere between 1.6g and 2.2g per kg body weight per day. For a 70kg person, that's 112–154g protein daily.

What is protein and why does your body need it?

Protein is a macronutrient made up of amino acids — the building blocks your body uses to construct muscle, hormones, enzymes, antibodies, and virtually every tissue in the body.

Unlike fat and carbohydrate, protein cannot be stored in significant amounts. Your body needs a steady incoming supply to maintain and repair tissues, support immune function, produce hormones, and rebuild muscle after training.

The nine essential amino acids your body cannot produce on its own — histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine — must come from food. The most important one for muscle building is leucine, the amino acid that triggers the mTOR pathway responsible for muscle protein synthesis.

This is why the protein source matters as much as the dose. Complete proteins (whey, casein, eggs, meat, dairy) contain all nine essential amino acids in usable amounts. Incomplete proteins (collagen, pea, rice on their own) are missing or low in one or more — limiting their effectiveness for muscle building regardless of total quantity eaten.

How much protein do you need based on your body weight?

The simplest way to calculate your daily protein target is to multiply your body weight in kilograms by a factor that matches your activity level — from 0.8 (sedentary baseline) to 2.2 (muscle building).

Body weight	Sedentary (0.8g/kg)	Active general (1.4g/kg)	Muscle building (1.6–2.2g/kg)
50 kg / 110 lb	40g	70g	80–110g
60 kg / 132 lb	48g	84g	96–132g
70 kg / 154 lb	56g	98g	112–154g
80 kg / 176 lb	64g	112g	128–176g
90 kg / 198 lb	72g	126g	144–198g
100 kg / 220 lb	80g	140g	160–220g

This table assumes lean body mass. People with significant excess body fat may want to calculate based on lean body weight rather than total weight to avoid overestimating needs.

How much protein do you need for building muscle?

For active people building muscle, daily protein should sit between 1.6 and 2.2g per kg of body weight, distributed across 3–5 meals throughout the day, with each meal containing at least 20–30g of complete protein.

The 2018 meta-analysis in the British Journal of Sports Medicine by Morton et al. — covering 49 studies and 1,863 participants — found that protein intake above 1.62g per kg per day produced no additional muscle gains in most healthy adults. The ceiling sits around 2.2g/kg for advanced or larger athletes.

The most-overlooked variable isn't total daily protein but per-meal distribution. Each meal should contain enough protein to trigger muscle protein synthesis — that means crossing the "leucine threshold" of approximately 2.5–3g leucine per meal, equivalent to:

• 25g of whey protein
• 30g of egg or meat protein
• 35–40g of plant protein (because of lower leucine content)

Eating 150g of protein in two giant meals is less effective than spreading the same 150g across 4–5 meals — your body can only synthesise muscle from one meal's worth of protein at a time.

How much protein do you need for fat loss?

For people in a calorie deficit trying to preserve lean muscle, protein needs increase to 2.0–2.4g per kg of body weight — significantly higher than maintenance because the body breaks down muscle for energy when fed less.

The reasoning: in a calorie deficit, your body looks for energy from any available source — including muscle tissue. Higher protein intake creates a stronger signal to preserve muscle while losing fat. According to a 2014 study published in the Journal of the International Society of Sports Nutrition, increasing protein to 2.3–3.1g per kg during energy restriction significantly reduced lean mass loss compared to standard 1.6g/kg intake.

For a 70kg adult in a calorie deficit, that means 140–168g protein daily — a noticeably higher target than maintenance. Hitting this through food alone often requires deliberate planning. Supplementation through shakes, bars, or properly-dosed gummies becomes practical at this level.

Note: this guidance applies to general healthy adults pursuing fat loss for fitness goals. People with disordered eating concerns, medical conditions, or specific dietary restrictions should work with a registered dietitian rather than self-prescribing intake.

How much protein do you need as a woman?

Women's daily protein needs follow the same per-kg formula as men — 1.4–2.2g per kg body weight depending on activity — and women often actually under-consume protein relative to their needs.

The myth that women need less protein than men is not supported by research. Both sexes use protein the same way at the cellular level — for tissue repair, hormone production, immune function, and muscle building. Women's smaller average body weight means their absolute total protein need is lower, but the per-kilogram ratio is the same.

According to a 2022 review in Nutrients on protein needs in women, current data does not support a different protein requirement for women — and many women in fitness and sports underconsume protein, particularly during the luteal phase of the menstrual cycle when needs may temporarily increase.

For a 60kg active woman building muscle, daily protein should sit between 96 and 132g. For most women, this requires deliberate planning — a typical Western diet of 3 meals often hits only 60–80g protein for women, well below the active-fitness range.

How much protein do you need as you age?

Older adults (50+) actually need more protein than younger adults — 1.2–1.6g per kg body weight is the current recommendation — because aging muscle is less responsive to protein, requiring higher doses to produce equivalent muscle protein synthesis.

This concept is called "anabolic resistance" — the muscle's reduced sensitivity to protein with age. A 25-year-old triggers maximum muscle protein synthesis from 20g of whey protein per meal. A 70-year-old needs roughly 35–40g to achieve the same response.

A landmark 2013 study in the Journal of the American Medical Directors Association by Bauer et al. — covering nutrition recommendations for older adults — recommended 1.0–1.2g/kg as a minimum for healthy seniors and 1.2–1.5g/kg for those with acute or chronic illness. Current 2025 research has pushed those numbers even higher for active aging adults.

The implication: a 70-year-old at 70kg should be eating at least 84g of protein daily — often more if active or recovering from any health setback. This is a substantial number that requires deliberate effort to hit through food alone.

Can you eat too much protein?

For most healthy adults, eating too much protein is unlikely to cause harm — research consistently shows no adverse effects from intakes up to 3g per kg body weight in healthy people, though kidney issues or specific medical conditions warrant caution.

The "too much protein damages your kidneys" myth has been repeatedly tested and not supported in healthy adults. A 2018 review in the Journal of Nutrition and Metabolism analysed multiple controlled studies and concluded that high protein intake (up to 2.8g/kg) showed no negative impact on kidney function in healthy people.

People who should consult a doctor before high-protein intakes:

• Anyone with pre-existing kidney disease
• Those with liver conditions
• People with specific metabolic disorders affecting amino acid processing
• Anyone on medications affecting kidney function

For healthy adults, the practical upper limit isn't a safety issue — it's just diminishing returns. Eating 300g of protein when you need 150g doesn't produce more muscle; the excess is broken down for energy or excreted.

What's the best source of protein?

The best protein sources are complete proteins that contain all 9 essential amino acids in sufficient amounts — whey protein isolate, eggs, meat, fish, and dairy lead the rankings, with pea-rice blends being the strongest plant-based option.

Source	Complete?	Protein per 100g	Leucine %
Whey protein isolate	Yes	90g	~11% (highest)
Chicken breast	Yes	31g	~9%
Beef (lean)	Yes	26g	~8%
Eggs (whole)	Yes	13g	~8.5%
Greek yoghurt	Yes	10g	~10%
Salmon	Yes	20g	~8%
Pea + rice blend	Yes (combined)	~75g (isolate)	~8%
Lentils	No (low methionine)	9g	~7%
Collagen	No (no tryptophan)	~90g (isolate)	~3% (very low)

For a deeper dive on the protein source question, see our companion guide: Whey vs Collagen vs Pea Protein: Which Builds Muscle Best?

When should you eat protein?

The best protein timing strategy is to distribute intake across 3–5 meals through the day, with each meal containing 20–40g of complete protein, spaced 3–5 hours apart.

The reason: muscle protein synthesis is meal-by-meal, not total-day-only. Each protein-containing meal triggers a separate synthesis response that peaks 2–3 hours after eating and tapers over the next 2–3 hours. Eating protein every 3–5 hours keeps the synthesis machinery running through the day.

The 2017 ISSN protein position stand specifically recommends "consuming high-quality protein sources every 3–4 hours" as the optimal pattern. A common practical schedule looks like:

• Breakfast (7–9am): 25–35g protein (eggs, yoghurt, protein smoothie)
• Mid-morning (10–11am): 15–20g protein (gummies, jerky, hard-boiled egg)
• Lunch (1–2pm): 30–40g protein (chicken, fish, beef bowl)
• Afternoon (4–5pm): 15–25g protein (gummies, Greek yoghurt, shake)
• Dinner (7–9pm): 30–40g protein (main meal protein source)

This is where convenient protein formats start to matter. Hitting 25g protein at 4pm via a chicken meal isn't always practical. NUDAY Protein Gummies are designed for these moments — 16g WPI per bag, ready to eat, no shaker needed, no mess.

How NUDAY Protein Gummies fit your daily protein target

NUDAY Protein Gummies deliver 16g of complete whey protein isolate per bag in a chewable format designed for the in-between moments most people miss — between meals, post-workout, while travelling, at work — where hitting daily protein targets through food alone breaks down.

For more on why protein source matters as much as dose, see our companion guides: Do Protein Gummies Actually Work? and Whey vs Collagen vs Pea Protein.

Frequently Asked Questions

How much protein per day to build muscle?

For most active adults building muscle, 1.6–2.2g protein per kg of body weight per day is the research-backed range. For a 70kg adult, that's 112–154g daily. Distribute across 3–5 meals, with each meal containing at least 20–30g of complete protein to trigger muscle protein synthesis.

Is 100g of protein a day enough?

For a 70kg sedentary adult, 100g per day is plenty. For an active 70kg adult building muscle, 100g is below target — you'd want 112–154g. For a 90kg active adult, 100g is significantly under-target. The right number depends on your weight and activity level, not a single universal figure.

Is 200g of protein a day too much?

For most healthy adults, no. Research consistently shows no adverse effects from intakes up to 3g per kg body weight in healthy people. For a 70kg adult, 200g equals 2.85g/kg — well within tolerated ranges. For a 100kg adult, 200g equals 2.0g/kg — solidly in the muscle-building range.

How much protein per kg of body weight?

It depends on goals: 0.8g/kg (sedentary minimum), 1.2–1.4g/kg (general active health), 1.6–2.0g/kg (muscle building), 2.0–2.4g/kg (cutting/fat loss while preserving muscle), 1.2–1.6g/kg (older adults 50+). Multiply your body weight in kg by the factor matching your goal.

How much protein does a woman need per day?

Women's needs follow the same per-kg formula as men. For a 60kg active woman, daily target is 84–132g depending on goals. The myth that women need significantly less protein isn't supported by research — total grams scale with body weight, but the per-kilogram ratio is the same as men.

How much protein after a workout?

Aim for 25–40g of complete protein within 2 hours of training. This crosses the leucine threshold and maximises muscle protein synthesis. For older adults (50+), the post-workout dose should be higher (35–45g) to compensate for anabolic resistance. NUDAY Protein Gummies at 16g per bag work well alongside a small post-workout meal.

Can you build muscle on 50g of protein a day?

Not effectively for most people. 50g protein per day is below the muscle protein synthesis threshold for adults over 45kg body weight. You can maintain existing muscle at this level if otherwise healthy, but building new muscle requires meeting per-meal leucine thresholds across multiple meals — which 50g total can't reliably do.

How much protein at each meal?

20–40g of complete protein per meal triggers maximum muscle protein synthesis in most adults. Younger adults can max out at 20–25g per meal; older adults need 35–45g per meal due to anabolic resistance. Eating 100g protein in two huge meals is less effective than spreading the same 100g across 4 meals.

Is it better to eat protein in the morning or evening?

Distribution matters more than timing. Both morning and evening protein are valuable — morning kickstarts muscle synthesis after the overnight fast, evening protein supports overnight recovery (casein-rich foods are particularly good before bed). The biggest gains come from evenly spaced meals across the day, not optimising one specific time.

What happens if you don't eat enough protein?

Persistent under-intake causes muscle loss, slower recovery, weaker immune function, more frequent injury, hair and nail issues, mood disturbance, and impaired hormone production. Even mild chronic under-intake (1g/kg in active adults) compounds over months into measurable performance and body composition decline.

Key Takeaways

• Daily protein needs range from 0.8g/kg (sedentary minimum) to 2.2g/kg (muscle building)
• Most active adults should target 1.6–2.0g per kg body weight per day
• For a 70kg adult, that's 112–140g protein daily across 3–5 meals
• Each meal should contain 20–40g of complete protein to cross the leucine threshold
• Complete proteins (whey, eggs, meat, dairy) outperform incomplete proteins (collagen, pea, lentils)
• Older adults need MORE protein (1.2–1.6g/kg), not less, to combat anabolic resistance
• Women's per-kg needs are identical to men's — the myth that women need less isn't supported
• Spread protein across the day every 3–5 hours rather than 2 large meals
• NUDAY Protein Gummies (launching soon) deliver 16g WPI per bag for the in-between moments

The bottom line

The honest answer to "how much protein do I need" is a calculation, not a magic number. Multiply your body weight in kg by 1.4 (general active) to 2.2 (muscle building) and you've got your daily target.

The harder truth most articles miss: total daily protein is only half the equation. Per-meal dose, protein source completeness, and timing distribution across the day all matter. Hitting 150g protein in one shake doesn't equal hitting 150g across five meals — the synthesis machinery works meal-by-meal, not all at once.

For most people, hitting daily protein through food alone is possible but requires deliberate planning. The afternoon gap (3–5pm) is where most people fall short. This is where chewable, ready-to-eat protein formats earn their place — fitting protein into moments where shakes and meals don't.

NUDAY Protein Gummies are launching soon — 16g whey protein isolate per bag, the world's first WPI protein gummy at a real dose, formulated for exactly those in-between moments.

Sources & References

1. Jäger, R. et al. (2017). "International Society of Sports Nutrition Position Stand: protein and exercise." Journal of the International Society of Sports Nutrition, 14(1).
2. Morton, R.W. et al. (2018). "A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults." British Journal of Sports Medicine, 52(6).
3. Bauer, J. et al. (2013). "Evidence-Based Recommendations for Optimal Dietary Protein Intake in Older People."Journal of the American Medical Directors Association, 14(8).
4. Antonio, J. et al. (2014). "The effects of consuming a high protein diet on body composition and training adaptations." Journal of the International Society of Sports Nutrition, 11(19).
5. Phillips, S.M. (2014). "A brief review of critical processes in exercise-induced muscular hypertrophy." Sports Medicine, 44(1).
6. Devries, M.C. et al. (2018). "Changes in Kidney Function Do Not Differ between Healthy Adults Consuming Higher- Compared with Lower- or Normal-Protein Diets." Journal of Nutrition, 148(11).