Research-backed daily protein targets for your body weight, activity level, and goal — with a personalized meal plan and food-source servings.
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Primary goal
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Goal
How Much Protein Do You Really Need?
The RDA (Recommended Dietary Allowance) for protein is 0.8 g per kg of body weight — but this figure represents the minimum to prevent deficiency in sedentary adults, not the optimal amount for health, body composition, or performance. For anyone who exercises regularly, current research consistently points to significantly higher targets.
The International Society of Sports Nutrition (ISSN) recommends 1.4–2.0 g/kg for exercising individuals, while research on muscle hypertrophy specifically points to 1.6–2.2 g/kg as the range where muscle protein synthesis is maximized. During a caloric deficit (fat loss phase), requirements increase further — 2.3–3.1 g/kg of lean body mass — because protein helps preserve muscle tissue when calories are restricted.
Protein Targets by Goal — Reference Table
Goal
Min (g/kg)
Optimal (g/kg)
Max useful (g/kg)
Notes
Sedentary (RDA)
0.8
1.0
1.2
Minimum for deficiency prevention
General fitness
1.2
1.4
1.6
Light exercise 1–3×/week
Endurance sports
1.2
1.6
1.8
Running, cycling, swimming
Maintenance (active)
1.4
1.6
2.0
Preserve mass, moderate training
Muscle gain
1.6
2.0
2.4
ISSN hypertrophy recommendation
Fat loss (preserve LBM)
1.8
2.4
3.1
Higher needs during deficit; per LBM
Body recomposition
2.0
2.4
3.1
Simultaneous cut & build
Strength/power athlete
1.6
2.0
2.4
Powerlifting, Olympic lifting
Combat sports
1.6
2.0
2.4
Higher during weight-cut phases
Why Lean Mass Matters More Than Total Weight
Protein’s primary job is building and repairing lean tissue — muscle, organs, connective tissue. Fat mass doesn’t have meaningful protein turnover, so it doesn’t increase protein requirements. Using lean body mass (LBM = total weight − fat mass) as the basis for protein calculations is more accurate, especially for people with higher body fat percentages.
For example: two people both weigh 90 kg. Person A has 15% body fat (LBM = 76.5 kg). Person B has 35% body fat (LBM = 58.5 kg). At the same activity level and goal, Person A needs more total protein than Person B because they have more metabolically active tissue to feed. Total-weight calculations overestimate needs for Person B.
Protein Timing: Does It Matter?
Research shows that spreading protein intake across 3–5 meals produces better muscle protein synthesis than eating the same amount in 1–2 large sittings. The “muscle full” effect suggests that muscle protein synthesis is maximally stimulated by roughly 0.4 g/kg per meal (about 25–40g for most people), after which additional protein in that sitting provides diminishing returns for muscle building — though it still contributes to satiety and other functions.
Post-workout protein matters, but the “anabolic window” is wider than once thought — 3–5 hours rather than 30 minutes. A high-protein meal within a few hours of training is sufficient. Pre-sleep protein (casein or a mixed protein source) also supports overnight muscle protein synthesis, making it a useful strategy for muscle gain.
Complete vs. Incomplete Protein Sources
A complete protein contains all 9 essential amino acids (EAAs) in adequate amounts. Animal sources (meat, fish, dairy, eggs) are complete. Plant sources are typically incomplete or lower in one or more EAAs — but this is easily addressed by combining sources (rice + beans, for example) or eating enough variety throughout the day. Leucine specifically is the key amino acid that triggers muscle protein synthesis, and plant sources generally provide less leucine per gram of protein, meaning plant-based individuals may benefit from slightly higher total protein intake.
Top Protein Foods by Efficiency
Food
Protein (g/100g)
Serving
Protein per serving
Category
Chicken breast (cooked)
31
100g
31g
Meat
Turkey breast (cooked)
29
100g
29g
Meat
Tuna (canned, drained)
26
85g can
22g
Fish
Salmon (cooked)
25
100g
25g
Fish
Whey protein powder
80
30g scoop
24g
Supplement
Greek yogurt 0%
10
170g cup
17g
Dairy
Cottage cheese 2%
12
113g ½cup
14g
Dairy
Eggs
13
50g large
6g
Dairy/Egg
Tempeh
19
100g
19g
Plant
Hemp seeds
32
30g
9.5g
Plant
Tofu (firm)
8
100g
8g
Plant
Edamame
11
100g
11g
Plant
Lentils (cooked)
9
100g
9g
Plant
Frequently Asked Questions
Is 1g of protein per pound of body weight a good rule?
The "1g per pound" rule (≈ 2.2 g/kg) is popular in fitness communities and falls near the upper end of what research supports for muscle gain. It's not dangerous, and it's easy to remember — but it may be more than necessary for some people and slightly insufficient during an aggressive fat-loss phase for others. Research suggests 0.7–1.0g per pound (1.6–2.2 g/kg) covers the optimal range for most exercising adults.
Can you eat too much protein?
In healthy individuals, high protein intake (up to 2.5–3.1 g/kg) is well-tolerated and not harmful to kidneys. The concern about kidney damage from protein applies primarily to people with pre-existing kidney disease. The main practical "too much" issue is that excess protein above what the body can use for muscle synthesis is simply oxidized for energy — no extra muscle is built, and calories add up. Beyond about 2.4 g/kg, marginal muscle-building benefit becomes negligible for most people.
How much protein can your body absorb per meal?
The body can digest and absorb virtually unlimited protein — but the rate at which muscle protein synthesis is maximally stimulated per meal is roughly 0.4 g/kg body weight (about 25–40g for most people). Protein beyond that in a single sitting is still absorbed, but is used for energy rather than muscle building. This is why spreading protein across multiple meals (3–5 per day) is more effective for muscle building than eating it all at once.
Do plant-based athletes need more protein?
Yes, slightly. Plant protein sources generally have lower leucine content and digestibility compared to animal proteins. The leucine threshold to trigger muscle protein synthesis is easier to hit with animal sources. A practical adjustment is adding 10–20% to total protein targets for plant-based athletes (roughly 1.8–2.6 g/kg vs. 1.6–2.2 g/kg for omnivores), and focusing on high-leucine plant sources like soy, hemp, and lupini beans.
Should protein intake change on rest days vs. training days?
Muscle protein synthesis remains elevated for 24–48 hours after resistance training, meaning rest days are actually critical recovery and growth days. Maintaining consistent protein intake on rest days is recommended — it doesn't need to match training day intake precisely but shouldn't drop dramatically. Some athletes slightly reduce carbohydrate intake on rest days but keep protein stable.
Does protein intake matter for fat loss?
Significantly. High protein during fat loss serves three purposes: (1) preserving lean muscle mass that would otherwise be catabolized along with fat, (2) increasing satiety — protein is the most filling macronutrient — making it easier to sustain a caloric deficit, and (3) a higher thermic effect of feeding: protein requires more energy to digest (20–30% of its calories) compared to carbs (5–10%) or fat (0–3%). This is why fat loss protocols with adequate protein produce better body composition outcomes than low-protein caloric restriction.
What about protein for older adults?
Protein needs actually increase with age. Older adults (50+) experience anabolic resistance — muscle protein synthesis responds less efficiently to protein stimulation. The current evidence suggests 1.2–1.6 g/kg for sedentary older adults (compared to 0.8 g/kg RDA) and up to 2.0 g/kg for those who strength train. Higher per-meal doses (35–40g) may be needed to overcome this blunted response. Adequate protein combined with resistance exercise is the most effective intervention against sarcopenia (age-related muscle loss).