How Much Protein Should You Eat a Day? The Evidence

Published on 26 October, 2026

There is a number where extra protein stops doing anything for muscle, and it has been measured. A meta-analysis of resistance training trials found that beyond a total intake of about 1.62 grams per kilogram of body weight per day, additional protein produced no further gains in lean mass. Below that, more helps. Above it, you are buying expensive urine.

Daily Protein Requirements by Goal

Intake	Who it applies to	What it achieves
0.8 g per kg per day	The official recommended dietary allowance for adults	Prevents deficiency. It is a floor, not a target
1.0 to 1.2 g per kg per day	Older adults, and anyone losing weight	Protects muscle; the allowance is widely argued to be too low for this group
1.6 g per kg per day	Anyone resistance training for muscle	The measured ceiling for training gains. Beyond it, no further benefit

For a 70 kilogram adult those work out at roughly 56 grams, 70 to 84 grams, and 112 grams a day respectively. The gap between the official allowance and the training figure is the source of most of the confusion online: both numbers are correct, and they answer different questions.

The Research Behind 1.6 Grams per Kilogram

A systematic review, meta-analysis and meta-regression examined protein supplementation and resistance training in healthy adults. It found supplementation significantly enhanced gains in muscle strength and size, and that beyond total intakes of about 1.62 grams per kilogram per day there were no further gains in fat-free mass.

The benefit of supplementation decreased with age, and it was greater in people already resistance-trained. The people who most need protein to protect muscle get less benefit from supplementing it, and beginners gain from training itself regardless of what they drink afterwards.

Protein Needs for Older Adults

The recommended dietary allowance of 0.8 grams per kilogram was derived from nitrogen balance studies, which establish the amount needed to avoid deficiency rather than the amount that supports best function.

Work in older adults has argued directly that this allowance may not be adequate to maintain skeletal muscle. Aging brings anabolic resistance, meaning muscle responds less to a given dose of protein, so older adults need more rather than less. Given that loss of muscle is one of the clearest predictors of losing independence, this is not an academic point.

Protein Timing: Does It Matter When You Eat It?

Less than commonly claimed, and not nothing. Research on protein distribution and muscle-related outcomes has found associations between per-meal dose and frequency and both lean mass and muscle performance, while a broader review asked whether the evidence supports the distribution concept and found the case less settled than the popular version.

The practical reading: hitting your daily total matters most. Spreading it across three or four meals of roughly 25 to 40 grams each is sensible and easy, and chasing precise timing windows is a refinement rather than a requirement. Most people's actual problem is a breakfast containing almost no protein at all, which is worth fixing before anything subtler.

Vegetarian Protein Sources

This is harder than on an omnivorous one and entirely achievable. Plant proteins are generally lower in one or more essential amino acids, which matters across a day rather than at each meal, and the practical answer is variety rather than precise combining at every sitting.

Food	Protein per 100 g	Practical note
Soy, as tofu, tempeh or edamame	Tofu around 17 g; tempeh higher	The one plant protein with a complete amino acid profile
Lentils and beans, cooked	Around 8 to 9 g	The staple. Volume makes up for concentration
Greek yogurt and paneer	Yogurt around 10 g	Dairy is the easiest lever for vegetarians
Eggs	Around 13 g	Complete protein; two eggs give roughly 12 g
Nuts and seeds	Around 20 to 30 g	Calorie-dense, so a contributor rather than a base
Seitan	Very high	Wheat gluten; unsuitable for anyone avoiding gluten
Whole grains and quinoa	Quinoa around 4 g cooked	Contributes across the day rather than carrying a meal

A vegetarian aiming at 1.6 grams per kilogram generally needs to make protein a deliberate component of every meal rather than assuming it arrives. Our guide to moong dal covers one of the easiest staples for this.

Is High Protein Bad for Your Kidneys?

In people with healthy kidneys, there is no good evidence that higher protein intakes within the ranges discussed here cause kidney damage. The concern originates in people who already have chronic kidney disease, where protein restriction is sometimes part of management.

If your kidneys are healthy, 1.6 grams per kilogram is not a risk. If you have chronic kidney disease, protein intake is a medical question and belongs with the clinician managing your care rather than with a general article.

How to Meet Your Daily Protein Target

Work out your target: body weight in kilograms times 1.2 if you are mainly concerned with aging well, times 1.6 if you are training for muscle.
Fix breakfast before anything else. It is where most people get almost none, and adding eggs, yogurt or tofu closes a large share of the gap immediately.
Aim for 25 to 40 grams at each of three or four meals rather than one large serving.
Count food before supplements. Powder is convenient and it is not better than food, and the meta-analysis measured total intake rather than its source.
Pair it with resistance training. Protein without the training stimulus does not build muscle; it is the training that creates the demand.
Increase it during weight loss, where the risk is losing lean tissue alongside fat.

Vegetarian Protein at YO1

Everything served at YO1 is vegetarian, which makes protein a question worth raising rather than assuming. Pulses, paneer, yogurt, tofu, nuts and seeds are all on the menu, and the personal wellness consultation with a Health Counselor that opens every stay is the place to discuss intake if you are training, older, or managing weight.

Our guides to the best arm exercises and to reducing belly fat both make the same point from different directions: protein and resistance training together decide whether what you lose is fat and what you keep is muscle.

Book Your Wellness Journey at YO1

Everything served at YO1 is vegetarian, and every stay opens with a personal wellness consultation with a Health Counselor where protein intake is worth raising if you are training, older or managing weight.

To plan a stay built around what you have come for, visit yo1.com.

FAQs

Q: How much protein do I need a day?

A: It depends on your goal. The official allowance is 0.8 grams per kilogram of body weight, which prevents deficiency. Around 1.2 grams suits older adults and anyone losing weight. For building muscle with resistance training, about 1.6 grams per kilogram is the measured ceiling beyond which more adds nothing.

Q: Is 1.6 g per kg really the limit?

A: For resistance-training gains in lean mass, yes, according to a meta-analysis and meta-regression of supplementation trials. Beyond total intakes of about 1.62 grams per kilogram per day there were no further gains in fat-free mass.

Q: Do older adults need more protein?

A: Probably, and more than the official allowance provides. Work in older adults has argued directly that 0.8 grams per kilogram may not be adequate to maintain skeletal muscle, because aging brings anabolic resistance: muscle responds less to the same dose.

Q: Does it matter when I eat protein?

A: Less than commonly claimed. Hitting the daily total matters most, with three or four meals of roughly 25 to 40 grams being a sensible and easy pattern. The more common real problem is a breakfast with almost no protein in it.

Q: Can I get enough protein as a vegetarian?

A: Yes, with deliberate planning rather than assumption. Soy in the form of tofu, tempeh and edamame is the one complete plant protein; lentils, beans, dairy, eggs, nuts and seeds fill the rest. Variety across the day handles the amino acid question.

Q: Is high protein bad for your kidneys?

A: Not in people with healthy kidneys, where there is no good evidence of harm at these intakes. The concern comes from chronic kidney disease, where protein restriction is sometimes part of treatment. If you have kidney disease, this is a medical question rather than a general one.

Q: Do I need protein powder?

A: No. The meta-analysis measured total protein intake rather than its source, and food reaching the same total works the same way. Powder is convenient, particularly for people struggling to hit a target, and it is not superior.

Q: How much protein is in a realistic portion?

A: Roughly: two eggs about 12 grams, 100 grams of tofu about 17 grams, a 150 gram serving of cooked lentils about 13 grams, 150 grams of Greek yogurt about 15 grams, a 30 gram handful of almonds about 6 grams.

Q: Does protein help with weight loss?

A: It helps indirectly and usefully. It is the most filling of the three macronutrients and it protects lean tissue during a calorie deficit, which determines whether the weight you lose is fat or muscle. It does not cause weight loss by itself.

Q: What happens if I eat more than I need?

A: Nothing beneficial for muscle, and no harm in healthy people within normal ranges. Excess protein is used for energy or stored like any other surplus calories, which is why the practical answer is to stop at your target rather than push past it.

Sources

Morton RW, et al. 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. Br J Sports Med. 2018. PMID: 28698222
Campbell WW, et al. The recommended dietary allowance for protein may not be adequate for older people to maintain skeletal muscle. J Gerontol A Biol Sci Med Sci. 2001. PMID: 11382798
Protein Distribution and Muscle-Related Outcomes: Does the Evidence Support the Concept? Nutrients. 2020. PMID: 32429355
Loenneke JP, et al. Per meal dose and frequency of protein consumption is associated with lean mass and muscle performance. Clin Nutr. 2016. PMID: 27086196

Get in Touch

Please take a moment to fill out the form below with your contact information. A YO1 Longevity & Health Resorts representative will reach out to you with additional information.

Press Coverage

Connect with Us, Start Your Journey

Take part in customized health programs that are best suited to meet your individual needs.

Book Your Stay