Chapter 5: Protein on Keto: How Much, and Why It Is Not the Enemy

Summary: On keto, carbs are the limit, protein is the target, and fat fills whatever hunger is left; for most adults the studies point to about 1.2 to 1.6 grams of protein per kilogram of body weight per day, well above the RDA.

The short answer

Eat enough protein every day. It is a goal to hit, not a number to stay under.
The RDA (0.8 g/kg) is the minimum to avoid deficiency, not the amount that best protects muscle or controls hunger.
About 1.2 to 1.6 g/kg per day is where studies on appetite and weight management point (Leidy et al., 2015).
In a steep calorie deficit, higher still: a 2011 review gives 1.8 to 2.0 g/kg per day, depending on the size of the deficit (Phillips & van Loon, 2011).
Healthy kidneys: a 2018 meta-analysis found no different change in kidney filtration on higher protein (Devries et al., 2018). If you have kidney disease, set your number with your doctor.

KetoDick on this: he calls protein "a target, not a limit" and suggests women start around 80 g a day, more if tall or training hard (video 1JbK1_ClDmY; video UygKGoP_BtA).

Where protein fits in a keto plate

A keto day has three parts, and each one works differently.

Macro	Its role on keto	How you set it
Carbs	The limit	Keep under your daily cap (see Carbs)
Protein	The target	Hit a daily number by body weight
Fat	The flexible part	Eat to fullness; it is what comes down when hunger drops

Fat makes up most of the calories on keto partly because protein has a practical ceiling. You can only eat so much of it before it stops being useful, and carbs are kept low on purpose. Fat fills the rest of the energy you need.

KetoDick on this: in his early videos he explains "high fat" this way: carbs are capped, protein tops out, so the rest has to come from fat. He puts that protein ceiling near 220 g a day for an adult man, about 880 kcal (video cTGYIFOTPl8; video 9AGpKAfs3Yk). That 220 g figure is his; the evidence pages used for this guide do not give a protein ceiling. See Too much protein on keto?.

He also says the goal is low carb, not high fat (video cTGYIFOTPl8), and that when weight loss stalls, the calories to cut are fat calories, not protein (video 8Jk5ShSUpFY). The Fat chapter covers that side.

The RDA is a floor, not a goal

The US and Canadian Recommended Dietary Allowance (RDA) for adults is 0.80 g of protein per kg of body weight per day (National Academies, 2005). Europe's reference is 0.83 g/kg (EFSA, 2012).

These numbers come from nitrogen-balance studies. A meta-analysis of those studies found a median requirement of 0.65 g/kg per day, and 0.83 g/kg covered 97.5% of people (Rand, Pellett & Young, 2003). In plain terms, the RDA is the amount that keeps almost everyone out of deficiency.

It was not designed for someone eating fewer calories to lose fat while trying to keep muscle. That is why studies on weight loss, appetite and aging use higher numbers. EFSA also describes intakes up to about twice its reference value as commonly eaten and considered safe (EFSA, 2012).

More detail: Is the protein RDA enough?

The numbers by body weight

Source	Who it covers	Grams per kg per day
RDA (National Academies, 2005)	Healthy adults, minimum	0.80
PROT-AGE (Bauer et al., 2013)	Adults over 65	1.0 to 1.2
Leidy review (Leidy et al., 2015)	Appetite and weight management	1.2 to 1.6
ISSN (Jäger et al., 2017)	Most people who exercise	1.4 to 2.0
Phillips & van Loon (2011)	Energy restriction, by size of deficit	1.8 to 2.0

To turn this into grams, multiply your weight in kg by the number. Weight in pounds divided by 2.2 gives kg. A 70 kg (154 lb) woman eating 1.2 g/kg needs about 84 g a day.

Full table by body weight, per-meal amounts and how to count: How much protein on keto?

Will extra protein knock you out of ketosis?

This is the most common protein worry on keto forums. The idea is that extra protein gets turned into sugar through a process called gluconeogenesis, and that this raises blood sugar and stops ketosis.

The body does make glucose from amino acids and other sources, and a 2014 review covers how this works along with protein's effects on fullness and calorie burn (Pesta & Samuel, 2014). The evidence used for this guide does not report a protein amount, in the 1.2 to 2.0 g/kg range, that ends ketosis.

KetoDick on this: he says the keto community has a "huge inappropriate fear of protein" (from the video), and that cutting protein to break a stall often costs muscle, so he tells people to err high (video UygKGoP_BtA). In his line-by-line response to a 2019 Men's Health article, he rejects its claim that keto limits protein to 100 g a day (video 1JbK1_ClDmY).

More detail: Too much protein on keto? Gluconeogenesis explained

Protein and fullness

Reviews on this topic report that protein increases fullness (Westerterp-Plantenga et al., 2009). In one trial, raising protein from 15% to 30% of calories, with carbs held the same, led people to eat 441 fewer kcal per day on their own, and they lost 4.9 kg over 12 weeks (Weigle et al., 2005). That trial had 19 adults.

A review of 24 trials found that energy-restricted, higher-protein diets gave a little more weight and fat loss and less loss of lean mass (Wycherley et al., 2012).

KetoDick on this: he names protein and fibre as the two most filling parts of a daily diet (video 1JbK1_ClDmY).

More detail: Protein and fullness and Hunger and fat loss.

Protein and muscle while you lose weight

When you eat less, your body can lose muscle along with fat. Enough protein limits that loss. That matters because muscle supports strength, daily movement and how your body looks at a given weight.

Most of the muscle studies used men or trained athletes. None of the studies on the protein evidence page was specific to women aged 30 to 60 on low-carb diets. The direction of the findings is consistent, but the exact numbers come from other groups.

KetoDick on this: he says protein should be set by lean mass, with carbs as the limit and fat as the part that drops as hunger falls (video 8Jk5ShSUpFY).

More detail: Losing muscle on keto and Body recomposition.

Protein after 50

Older adults need more protein per kg, not less. The PROT-AGE group recommends 1.0 to 1.2 g/kg per day for adults over 65, and 1.2 to 1.5 g/kg with acute or chronic illness (Bauer et al., 2013).

In the Health ABC study of 2,066 adults aged 70 to 79, the group eating the most protein lost about 40% less lean mass over three years than the group eating the least (Houston et al., 2008).

More detail: Protein after 50 and Keto for women over 40.

Protein and your kidneys

In adults without kidney disease, a 2018 meta-analysis of 28 studies (1,358 people) found that higher protein intakes did not change kidney filtration (GFR) differently from normal or lower intakes (Devries et al., 2018). "Higher" meant at least 1.5 g/kg per day, at least 20% of calories, or at least 100 g a day.

People who already have kidney disease are a different case. The 2014 review flags caveats for them (Pesta & Samuel, 2014). If you have kidney disease or reduced kidney function, talk to your doctor before raising protein.

KetoDick on this: he tells anyone with a kidney issue, type 2 diabetes or pre-diabetes to involve their doctor (video GojQvo_2GS0).

More detail: Does high protein hurt your kidneys? and Who should talk to a doctor first.

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Last verified: 2026-10-31