r/nutrition • u/thugnuts1 • 6h ago
Lowest cal highest protein foods?
What's the easiest way to hit as much protein but staying as low in calories as possible
r/nutrition • u/ThymeLordess • Apr 08 '26
Hello from the new RD mods! We are starting a new monthly (for now) series where we will help you learn the facts about a nutrition topic. These posts may include the latest nutrition research, evidence-based information about popular topics we see you all posting about, or maybe random interesting nutrition information. A lot of work is going into this, and we ask that comments remain respectful. We have no objective other than to use our (way too many) years of nutrition and science education to help you learn. We understand that not everyone will agree on… literally anything… and as scientists we certainly welcome, and even encourage, healthy debate. We give you our word that we will do our homework and endeavor to remain as objective and truthful as possible, ensuring our citations are current and peer reviewed. We ask you to keep this in mind if you comment in disagreement. On that note, we welcome you to this month‘s topic Understanding Protein!
Our inaugural post focuses on protein, a topic we see debated ad nauseam on this sub, although I bet many of you are still confused about how much protein we actually need! Protein is absolutely essential for the continuation of life on Earth, and we could not survive without it, as it makes up a good part of our bodies and is needed for most of the biological processes that help us survive. One of three macronutrients (which are protein, carbohydrates, and fats) the human body needs to ingest, deficiency weakens the immune system, makes wound healing more difficult, and leads to loss of muscle mass, putting the body at risk for injury and falls. The most serious consequence of deficiency is a type of malnutrition called kwashiorkor, which can cause death.
Every protein inside and outside the body is made of a long chain of amino acids (AA) that are folded in all different ways, generally the way it looks will be determined by what it needs to do. Proteins are found inside every single cell in the human body and make up every single enzyme needed for every single metabolic reaction. An example of structure and function is in our muscles; they are held together by fibrous proteins and filled with all types of special proteins, some of which are designed to stretch and contract, others that turn general energy from the food we eat into mechanical work, and even more that can store some of this energy in case we don’t eat for a little while or just need a burst of energy. Basically protein is very, very important!
Before we discuss the current protein recommendations we must appreciate the science that explains where these recommendations come from, so buckle up for some biochemistry my friends! In a nutshell, amino acids are organic compounds (based on carbon) that all have the same backbone (H2NCHRCOOH) with a “side chain” that is made up of various combinations of carbons, hydrogens, oxygens, and an occasional sulfur.
Over 500 amino acids have been identified, but we only care about 20 of them because these 20 amino acids make up everything from the edamame I ate for dinner to our entire genetic code! (For all you smarty pants out there, I recently learned that two new amino acids have been identified!) The N in the molecular formula above stands for nitrogen, which is kind of what makes protein special. Protein is 16% nitrogen, meaning 1 gram of nitrogen equals 6.25 g protein.
We consume nitrogen in the protein we eat, and amino acids are broken down in the stomach and small intestine by digestive enzymes (which are also proteins), and distributed to be used for various metabolic functions. We’re also losing a bit of nitrogen through sweat, respiration, flatus, skin flaking, and nail/ hair growth, and most of all from poop, which is the reason why why it makes such good fertilizer.
When we eat just enough nitrogen to compensate for what is lost we call this a “neutral nitrogen balance.” A “positive nitrogen balance” is preferable when we want to increase our muscle mass, when we’re losing weight (intentionally or unintentionally), or if we have a significant injury that needs to heal. If we can‘t meet our protein needs we will be in “negative nitrogen balance,” which means that the dwindling supply of nitrogen gets delegated to the most essential of functions; muscle, hair, and nails are the first to get sacrificed. We never want to be in a negative nitrogen balance.
Studying nitrogen balance is what has led to our current protein recommendations, and the FAO/WHO/UN periodically gathers scientists from around the world to review and update these guidelines, which get more precise and accurate as the technology to measure nitrogen balance improves. Our current protein recommendations come from meta-analyses of long-term nitrogen balance studies conducted throughout the world throughout the past 100 years. There is an overwhelming body of evidence that accepts the WHO recommendation of 0.83-1 g/kg/day of protein, which will meet the needs of 97.5% of healthy adults. In terms of numbers this means a person that weighs 68 kg (150 lbs) needs ~68 grams of protein per day (divide by 2.2 to convert pounds to kilograms if you want to calculate this for your weight).
Concerned you may be part of the other 2.5% of people? We already know we excrete more nitrogen when we are wounded building muscle, or trying to maintain muscle mass in a catabolic state, but what does this mean? A common internet recommendation seen is 0.8-1 g/lb (1.76-2.2 g/kg), which is more than double what WHO recommends! The International Society of Sports Nutrition recommends 1.4-2 g/kg (95-136 g per day for someone 150 lb/68 kg) for “healthy, exercising individuals.” If you exercise daily and your kidneys are at peak functioning then this recommendation is absolutely appropriate, although evidence suggests that increasing protein intake above the currently accepted 1 g/kg/day may not have much benefit.
Now that we know where our protein recommendations come from, what is the deal with animal vs plant sources? Both animal and plant sources contain protein, but the proteins in animal tissue (like our bodies! and the lamb chop I had for dinner) contain all the essential amino acids, whereas plant sources contain some, rarely all have varying levels of each amino acid but rarely enough of all essentials to meet our protein needs in full. Someone that eats animal proteins will easily exceed their protein recommendations, and someone that only consumes plants can easily meet their protein needs also as long as they eat a variety of foods to ensure they get enough of every essential amino acid.
So this is the deal with protein! Please let us know what you think, and also what you want to learn about next. We are happy to share our knowledge and will continue to disseminate evidence-based nutrition information.
r/nutrition • u/AutoModerator • May 04 '26
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r/nutrition • u/thugnuts1 • 6h ago
What's the easiest way to hit as much protein but staying as low in calories as possible
r/nutrition • u/Wild_Duck8926 • 4h ago
Most people have to take their lunch to work, it has to be affordable, and it has to taste okay. I've thought about this a lot, and know a lot of people struggle with this and resort to unhealthy or expensive lunch items. It seems impossible to get enough protein in lunches unless you want to prepare shredded chicken or prep for the week.
Are there any simple combinations of food out there that are filling, meet nutritional goals, and are actually affordable?
r/nutrition • u/cnotes462 • 1h ago
Before I start, yes I know, non instant oatmeal is better. Make my own overnight oats with healthy ingredients, bla, bla, bla, etc.
My wife and I are debating whether eating the quaker (or equivalent) instant oatmeal packets are better than just not eating anything.
Like, you're supposed to eat breakfast so might as well eat that instead of nothing at all right? Better than sugar cereal or just din be to toast.
Edit to clarify: These would be the brown sugar cinnamon, apple cinnamon, cinnamon spice(?) packets
r/nutrition • u/wobblelikeapenguin • 1d ago
I’m trying to understand which amino acids are present in egg whites versus egg yolks, but I keep finding conflicting information online.
Do both contain all nine essential amino acids, just in different amounts? Are any amino acids found only in the white or only in the yolk? What about the non-essential amino acids?
I’d appreciate reliable sources or a side-by-side breakdown. Ideally, I’d like to distinguish the amino acid profile per gram of protein from the total amounts in the white and yolk of one egg. Thank you!
r/nutrition • u/Apprehensive-Gear512 • 1d ago
Hello! My name is Larissa Coonce and I am an honor’s student at Indiana State University. I am assisting Dr. Virgil Sheets of Indiana State University to conduct a study of personal characteristics and food preferences. You need to be at least 18 years old and a resident of the US. The survey should take under 10 minutes and it is completely anonymous. Here is a link to the survey:
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Thank you for your consideration!
r/nutrition • u/antroboomin • 2d ago
I’ve seen people mix whatever juice they have (tart cherry, pomegranate, cranberry) and psyllium to make a “fiber jelly”. As someone who avoids fruit juices I’m curious, does reintroducing soluble fiber that was lost during the juicing process offset the effects of the bad sugar?
r/nutrition • u/No_Actuator_5149 • 2d ago
Has anyone ever drank Kefir milk and know more about it? I recently tried it for the l first time and it is really good! I was thrown off a little at first because it's more like yogurt then milk (not quite as thick though). And it's full of probiotics and protein! The blueberry flavor is delicious.
r/nutrition • u/Dior-Homie67 • 3d ago
It seems that gluten free diets have been popular lately even among people that aren’t celiac. I know Matt Damon cut out gluten to prepare for Odysseus, along with other things, and got down to 167 pounds. Just curious if anyone has cut out gluten and felt anything notably different.
r/nutrition • u/Select_Safe548 • 4d ago
Most brands dont list the amount of caffeine in their icecream or if it was made using powder/decaf/etc. Is there a way to find out the caffine levels in my favorite coffee icecream?: Trader Joes Coffee Bean Blast
r/nutrition • u/MsNiOris • 6d ago
What do we think about having rounds as a regular for our diet? I am trying to fiber max as the kids say and I can’t seem to be consistent with anything else but prunes.
r/nutrition • u/AbjectPawverty • 7d ago
I know the studies say there are longevity benefits and stuff, but to get my recommended daily amount of fiber it seems like I have to plan every meal around it, and even then I often come up short unless I'm adding in beans or lentils... Is it actually worth it? Does anyone have tangible benefits they see day to day, or is it all setting yourself up for the future?
r/nutrition • u/lexjutsu • 9d ago
So I know that the shell of an egg has a crazy amount of calcium, so could you save the shell every time you have eggs and mince it up into a fine dust and use that to season your foods to up your intake of calcium?
Let me know your thoughts 💭
r/nutrition • u/cindyx7102 • 10d ago
I know a lot of it is successful corporate marketing, but I feel like there's more to it than that based on how pervasive the protein obsession is.
r/nutrition • u/AriKat_33333 • 9d ago
Would eating 80 lemons in one sitting be bad?
ok bye
r/nutrition • u/throwawayGreenland • 17d ago
My nutrition book says:
Ketone bodies provide an alternative fuel source during starvation, but when their production exceeds their use, they accumulate in the blood, causing ketosis. Because most ketone bodies are acidic, ketosis disturbs the body’s normal acid-base balance.
To spare body protein and prevent ketosis, the body needs 50 to 100 grams of carbohydrate a day.
ketosis (kee-TOE-sis): an undesirably high concentration of ketone bodies in the blood and urine.
Is this correct?
r/nutrition • u/u-Wot-Brother • 18d ago
Suppose you make a pot of split peas and a pot of cream of wheat. Both are cooked and then allowed to cool overnight before eating. The former is kept as is, but the latter has psyllium husk added to it prior to resting overnight — as much as would make it have equal fiber calorie-for-calorie as the split peas.
From the perspective of digestive health and glycemic index (ie: disregarding the other benefits the split peas have, like the extra protein), will the split peas still be “better”, or does the body not really distinguish between low fiber foods mixed with fiber versus foods that are naturally high fiber?
(And, as a bonus question, what if you instead had a theoretical fiber paste slathered on a slice of white bread, again making the fiber-per-calorie of your meal identical? In this case, the fiber isn’t mixed into the low fiber food, but you’re still consuming them together. Does this meaningfully differ from the “evenly incorporated fiber” option, or even the “naturally high fiber” option?)
I’m sure this is splitting hairs, but I’m curious.
r/nutrition • u/Only-Highlight-3569 • 18d ago
What do you think?
r/nutrition • u/MurphysLaw021 • 22d ago
Like let’s say you drink a cup of milk every day, maybe take an iron pill every day cuz you don’t get enough, or eat 3 servings of fruit every day. But one day you miss your cup of milk, your iron pill, or 1-3 servings of fruit. Would drinking 2 cups of milk the next day or adding whatever vitamin/portion you missed to the next day plus consuming your regular serving make up for it? Is it too much at that point? Or is it pointless?
r/nutrition • u/blackwatchdva • 22d ago
I know those specific ingredients cover a good amount of ground in terms of nutrients necessary for the body, but is it possible to live off of that as a daily meal?
What are some common foods (like, "found at Walmart" common) to make up for what this meal doesn't cover?
r/nutrition • u/alambi • 23d ago
Does being regular mostly always mean enough fibre has been consumed or is this a poor indicator? Can you be regular and consume very low fibre?
r/nutrition • u/Acrobatic-Damage-522 • 25d ago
Why the same black beans from different brands with the same weight serving size have very different amounts of fiber?
Which label is accurate?
HEB dried black beans:
Serving size: 1/4 cup or 35 grams dry
Calories: 80
Fiber: 12 g
Protein: 8 g
Walmart Great Value:
Serving size: 1/4 cup or 35 grams dry
Calories:120
Fiber: 5 g
Protein: 8 g
r/nutrition • u/Only-Highlight-3569 • 25d ago
I know ham and other processed meats are unhealthy but Is it ok to eat 2-4 slices of ham daily or will that still have negative health consequences?
r/nutrition • u/velvetbay • 26d ago
Hi all, just wondering about these cooking methods and nutrients from produce. If you boil or simmer vegetables like cabbage, spinach, kale, green beans, carrots, daikon, potatoes etc in a broth that you eat (as in soup, NOT boiling and then draining the water), do you get all the nutrients they contain? Or are some nutrients destroyed by this cooking process? TIA!