How much protein do you actually need per day?

Protein is the only macronutrient with a daily target worth tracking, and the number most people have heard is the wrong one for their situation.

The RDA is a floor

The recommended dietary allowance — around 0.8 g per kilogram of bodyweight for adults — was set to prevent deficiency in a general, largely sedentary population. It answers the question "how little can a person eat without developing a problem".

That is a useful public health number and a poor personal target for anyone lifting weights, losing fat, or over sixty. Treating a floor as a ceiling is the single most common protein mistake.

What the evidence supports for people who train

For adults doing resistance training, the range that repeatedly comes out of the literature is roughly 1.6 to 2.2 g per kilogram of bodyweight.

The lower end is adequate for most people in maintenance. The upper end is most useful when you are in a calorie deficit, because protein requirements rise as energy availability falls — your body is more inclined to break down muscle when it is short of fuel.

For a 70 kg person that is 112 to 154 g a day. For a 55 kg person, 88 to 121. The derivation and what to do if you carry a lot of body fat are in protein per kilo: where the number comes from.

Above roughly 2.2 g per kilogram, the evidence for further benefit thins out quickly. It is not harmful in healthy people; it is simply calories that could have been fat or carbohydrate.

Why protein specifically

Three reasons it earns its place ahead of the other two macros.

It preserves muscle in a deficit. Losing weight always costs some lean tissue. Adequate protein plus resistance training minimises how much, which is the difference between finishing a diet smaller and finishing it smaller and weaker — see losing fat while keeping the muscle you built.

It is the most filling macronutrient per calorie. A deficit with adequate protein is substantially easier to hold than one without, for reasons covered in fibre, fullness, and the macro nobody counts.

It costs more to process. Roughly 20 to 30 per cent of protein's energy is spent digesting and metabolising it, against under 10 per cent for carbohydrate. A small effect, in the right direction.

Distribution: useful, not decisive

The muscle-building response to a meal is limited in size and lasts a few hours. That argues for spreading protein rather than concentrating it.

The practical version: three to five meals containing roughly 0.3 to 0.4 g per kilogram each. For a 70 kg person, that is four meals of 25 to 30 g.

This matters less than total intake and it is not nothing. It is also easier in practice — reaching 140 g across four meals is straightforward; reaching it in two is unpleasant. More detail in protein timing: what matters and what doesn't.

Reaching it on Indian food

This is where the number stops being abstract. A typical Indian vegetarian day — poha, dal and roti, sabzi and rice — lands around 45 to 55 g of protein. The target for a 70 kg person is more than double that.

The gap closes with a small number of deliberate additions:

• Curd, one katori with two meals: +10 g
• Paneer or tofu, 100 g: +18 g
• Two eggs, if eaten: +12 g
• A second katori of dal: +7 g
• Roasted chana or sprouts as a snack: +7 g
• Soya chunks, 30 g dry: +16 g

Which of these to use, and what each costs in calories, is worked through in vegetarian protein worth the calories it costs and hitting your protein without a single scoop.

Quality, briefly

Protein sources differ in their amino acid profile and digestibility. Animal sources and soy are complete on their own; most plant sources are lower in one essential amino acid.

This matters far less than it is made to sound. Eating a variety of legumes, grains and dairy across a day covers it, and the old advice to combine complementary proteins within a single meal has not held up. The detail is in complete protein.

Is more ever harmful?

In healthy people with normal kidney function, intakes well above 2.2 g per kilogram have not been shown to cause harm in the studies that have looked. They also do not help.

People with existing kidney disease are a genuine exception and should follow medical advice rather than general guidance. Nothing here is medical advice.

What about supplements?

Whey is a convenient concentrated protein source and nothing more. The meta-analytic finding is that protein supplementation improves training outcomes, and the effect is explained by the extra protein rather than by the powder.

If you reach your target from food, a tub of whey buys you convenience. If you do not, it is a cheap and effective way to close the gap. That is the whole argument, expanded in is whey protein necessary, or just convenient.

Protein for people who do not lift

The ranges above assume resistance training. Without it, the picture changes but not to the RDA.

In a calorie deficit without training, protein still protects lean mass, and something in the region of 1.2 to 1.6 g per kilogram is a reasonable target. You will lose more muscle than a lifter would regardless, which is the argument for lifting rather than for eating less protein.

Over sixty, requirements rise rather than fall. Older adults respond less strongly to a given dose of protein, so both the daily total and the per-meal amount need to be higher — commonly 1.2 to 1.6 g per kilogram with 30 to 40 g per meal. This is covered in what changes about fat loss after 40.

Sedentary and weight-stable, the RDA genuinely is adequate. Most people reading a page about protein targets are not in this group.

What a day at target looks like

For a 70 kg person aiming at 130 g, on ordinary Indian food:

• Breakfast: three eggs and two rotis — 24 g
• Mid-morning: one katori curd — 5 g
• Lunch: chicken curry (120 g meat), two rotis, rice, salad — 34 g
• Snack: 30 g roasted chana — 7 g
• Dinner: 120 g paneer in a sabzi, dal, two rotis, curd — 38 g
• Before bed: 200 ml milk — 6 g

That is 114 g, which is close and not quite there — a useful demonstration that the target requires deliberate choices rather than good intentions. Adding 30 g of soya chunks to the dinner sabzi, or a second serving of curd, closes it.

Tracking it

Track two numbers: calories and protein. Carbohydrate and fat can be left to fill whatever is left, subject to a sensible minimum for fat.

Two numbers is barely more work than one, and it is where most of the remaining benefit of tracking sits, which is the argument in do you need to track macros, or just calories.