CommunityFood & Appetite

The Truth about "Calories"

28 replies16 peopleMar 28, 2026☆ Follow
Summary

Is CICO a reliable practical method for losing weight or does biology make calorie math misleading and incomplete?

The thread shows CICO works after the fact to explain weight change but fails as a predictive tool because absorption varies, metabolism adapts, and hormones dominate outcomes. Participants note that GLPs succeed where simple deficits often stall, and individual responses to food and exercise differ enough to break simple formulas. Most agree calorie labels are rough estimates rather than precise measurements.

What this discussion establishesWhere people disagree

Whether CICO remains a useful everyday tool for most people despite its limitations, or whether its dominance in advice actively misleads.

Still open

Whether any specific long-term dietary pattern can produce substantial sustained weight loss without medication for the majority of people.

Nothing here is advice.

28 replies · 16 people
SlowLedger42archiveopening postMar 28

People who hang around this spot often pick up on how casually I brush aside talks involving energy balance or food energy counts. Anyone lacking deep dives into various eating approaches might puzzle over that attitude, given how common those numbers are in weight discussions and how doctors push them hard. My reasons for ignoring them feel solid to me, yet folks new to those odd theories could question if this rests on sense or something else. This note should offer a bit to think over without getting too tangled. I will skip some finer points on purpose so it stays straightforward for anyone without special terms.

Basic rules about energy staying constant have worked well across science fields and form a key part of heat laws. Breaking those rules would upend the whole system, but that has not occurred. When folks mention food energy counts they mean a way to gauge stored power in what we consume. Researchers test this by setting the item on fire inside a sealed tool that tracks heat output. They add a set spark to start the burn then check how far the temperature rises beyond what the spark alone would cause. That extra rise gets labeled as the power from the item.

If our guts acted like full fireboxes and our only task was staying warm then those counts might track well since turning fuel straight into warmth works at full return. But bodies handle far more than heat so ideas of effort and return rates matter. Think of powering a vehicle. Only a small slice of the power in fuel turns into motion while most escapes as unused warmth that gets vented away. Any effort to create movement from power follows the same limit and never hits full return. Heat laws include a notion of disorder that captures this leftover waste.

Those quick to claim energy balance equals just the first heat rule often skip the second rule on disorder. If what we ate landed in a holding spot and the body used it later at some fixed return rate then energy balance would describe things neatly after a simple tweak. Different food types carry different processing costs though. Protein for instance demands extra work to break down compared with starches even though both get listed at the same count per unit. That means the body gains less usable effort from a given amount of protein than from the same amount of starches.

Balance fans already note this point and treat it as extra output which fits inside their view. I mention it only to show how the printed count on a package often fails to match the actual outcome after eating. One clear case appears when someone takes in far more protein than other types. The body cannot store or use the excess well and the person loses mass anyway. All power still balances in the end but the setup causes extra waste and a starvation like result.

Type 1 sugar issues before any shots offer another sign. Without the needed hormone blood sugar climbs while cells stay hungry and the liver keeps producing more. Kidneys then flush the excess out. The body could switch to other fuels yet hormone signals keep it stuck in the same loop leading to fast loss. Recent tests with drugs that lower one hormone show rats can hold steady weight and sugar levels without shots.

A further hint comes from eating only one macro type for a stretch. Insulin stays reduced and mass drops even with large amounts taken in. I do not suggest trying this but the outcome shows how shifts in signals can change results.

Hormone effects end up steering mass shifts in these cases. Energy balance never breaks yet it stops helping predict what will happen once signals change. Without gear to track every output detail we can only watch the scale and note patterns over time. The balance idea explains past drops perfectly since any loss must equal some average gap. Predicting ahead from counts alone fails though because the same daily total can lead to different paths depending on what gets chosen.

Many assume drugs that tweak hormones work only by cutting intake. Intake drops play a role but those drugs also nudge output rates upward. One animal test tracked two groups on identical totals of the same items. The group given the drug lost more and faster than the group whose portions were trimmed to match.

SlowLedger42archiveMar 28

Basically, the balance of energy intake against output explains weight changes once they have already occurred, yet it offers little help when someone actually wants to drop pounds. People have always realized that eating smaller amounts of their regular meals would tend to reduce body weight, without needing any formal measurement of energy content. That much stood out plainly from the beginning. An emphasis on this balance often leads folks to assume the particular items on their plate make no difference, even though those choices matter quite a bit.

IronWillow59archiveMar 28

I found that really fascinating! Appreciate you putting it together. My background doesn't cover much in biology or physics so I can't really speak to those parts, though I recall seeing a film years ago on how various individuals react in unique ways when they suddenly consume way more food, like some packing on fat while others build muscle without working out, a few getting nauseous and throwing up the excess, and others staying the same size maybe by moving around more unconsciously. It's clear that dropping pounds isn't as straightforward as folks often claim.

SteadyLedger26archiveMar 28

This overview hits the mark perfectly. Plenty of individuals continue believing that calories in versus out handles every aspect. Altering internal energy pathways using GLP-1 compounds offers benefits beyond mere intake and expenditure. Really appreciate the detailed look once more!

QuietLantern79archiveMar 28

That was a solid article. It looks like folks often fail to notice the variations in how individuals break down and use what they eat.

BlueTimber78archiveMar 29

It does the job well enough for most folks, which explains why people stick with the approach. This whole thing is basic stuff, not some complex game. Logging intake, monitoring body mass, maintaining a shortfall comes naturally since the energy count data sits right there for anyone to check. That it lacks perfect simplicity doesn't affect the vast majority. Threads like these encourage individuals to view themselves as exceptional cases. I tend to dismiss any post claiming to reveal the real facts. Everyone's just the same ordinary material in the end. Though I see the point being made, I still find value in using energy counts as a method, since it serves a purpose despite not covering everything.

IronWillow59archiveMar 29
↳ replying to @BlueTimber78

It's not like anyone's arguing against the idea that tracking intake versus output works for a few folks, or that we should ignore it completely as a method. You clearly missed the point of what was said and threw in some odd unrelated complaints that don't connect to the discussion at all. My view is that folks deserve correct details and they get to choose for themselves rather than having someone else decide what's important. These days learning about how the body functions with things like hormones apparently turns you into someone overly sensitive.

PlainQuill53archiveMar 29

I've gone back and forth with you on similar points in older threads, and though the piece looks clear overall there's another angle worth noting. What you take in from meals doesn't always match what actually gets handled by your system since some items like roughage or the shells on kernels slip through untouched while certain lipids do the same based on how your digestion works or how your body deals with blood sugar shifts. Those gaps can throw off any tracking attempts and leave someone puzzled when the scale stays put even after trying hard. It doesn't throw out the whole in versus out balance but just means the figures used were off. The output side has its own issues too since a shortfall often makes the body cut back on motion like small habits during the day. Back when I dropped a big amount of weight in my younger years without those meds after tough lower body sessions I'd feel drained enough at my job to stay still during breaks sometimes even stopping breathing without noticing until I had to catch up. That older study adjusted plans for each person to hit the same overall drop across the group. Basically plenty of individual differences can make the basic model miss the mark yet if every detail were known it would line up for anyone and cut down on the back and forth.

SharpCinder28archiveMar 29
↳ replying to @BlueTimber78

This really highlights how sellers view folks like me in transactions, which strikes me as pretty funny.

CopperSignal27archiveMar 29

I wonder whether shifting the balance of protein fat and carbs can actually change how the body works over many years to favor sustained fat reduction. Some data indicate that very low carbohydrate eating curbs hunger because ketone bodies influence areas of the brain that govern fullness yet the impact stays modest and falls well short of what certain medications achieve. I have come across few extended trials that document meaningful ongoing weight reduction from any eating plan or activity program lasting multiple years and exceeding roughly that modest range but if large studies exist I would like to see them. One common complaint about simple energy balance math is that most individuals misjudge their actual food consumption so the arithmetic rarely lines up. Few people factor in how much total daily burn declines once weight drops both from losing active tissue and from an adaptive slowdown triggered by extended lower intake and that this reduced burn rate can linger for years or remain permanent after major loss. When I weighed far more the predicted rate of change aligned closely with the gap between intake and estimated needs producing steady monthly decline but later the identical intake produced no further change once body mass had fallen substantially because expenditure had dropped sharply. Standard formulas seldom reflect that kind of halving or its prolonged duration. I believe food choices and timing can influence appetite signals to a degree yet my own method centers on keeping nutrient levels steady avoiding sharp blood sugar swings and steering clear of concentrated energy sources rather than pursuing a ketogenic pattern.

WarmMeadow92archiveMar 29

On this site I've supported the idea of balancing energy in and out. Honestly my attention has stayed mostly on what goes in without digging deep into what gets burned. I avoid eating more to match any added activity body heat or shifts in hormones. After dropping over a hundred pounds I've adjusted my overall food amounts downward. My main aim is shedding weight and for me that comes from handling intake. Should another method exist that skips intake control I'd like to explore it. Does anyone have a concrete approach they're pushing or does this stay at the idea stage?

BlueTimber11archiveMar 29

There's this show I enjoy tuning into because it covers research papers about energy balance quite frequently. The subject really is intricate and intriguing. Individuals vary in the energy they extract from meals and expend through actions. For instance those estimators for daily needs often contain significant inaccuracies for numerous causes still many treat them as definitive online.

AmberSignal57archiveMar 29
↳ replying to @SlowLedger42

People differ in how effectively they break down what they eat. That variation in processing means nutrient uptake won't match across individuals, so calories should follow the same pattern.

SlowLedger42archiveMar 29
↳ replying to @BlueTimber78

CICO gets pushed hard everywhere as the main explanation for dropping pounds, yet glp drugs keep gaining traction, which suggests the approach falls short for plenty of folks. Adjustments do exist in bomb testing to account for things like fiber that doesn't fully burn, but those tweaks still miss how gut bacteria sometimes turn fiber into usable fats or how nitrogen readings don't always match actual protein content. Even with better tweaks the whole calorie framework stays limited because hormones and other factors steer what the body actually does with incoming energy. It sets an outer bound at most, not a reliable forecast of results. Keto shows one way to drop insulin and trigger faster fat loss even when intake looks high on paper. Nobody would pick full diabetes as a method, but keeping insulin low demonstrates the hormonal side can override simple tallies. Lumping everything into broad macro buckets hides real differences, like how starch turns straight into glucose most cells handle while sugar splits into fructose that the liver must rework much like alcohol. Fructose also hits harder on tissues than equal glucose amounts. Some patterns hint that fall foods high in fructose plus certain fats might cue the body to store reserves ahead of leaner months, and a few animals need those fats to handle seasonal shifts at all. Treating every fat the same could block seeing those distinctions. Even strict weighing leaves calorie numbers as rough guesses, though processed items give tighter estimates because they break down easily. Whole foods vary more in what actually gets absorbed. Since energy burned stays hard to pin down without lab gear, it ends up guessed backward from intake and scale changes. That works for past averages but gives no clue what tomorrow brings. Trying to hold intake under a fixed line while hoping output stays put is what most people mean by the method, yet it leaves the real variable out of reach. The fact that people still hunt for hormone-based routes shows the basic model alone doesn't deliver. Plenty of studies point to unexpected ways specific foods shift weight, and keto hints at useful levers even if it doesn't lock everything down for everyone.

WarmMeadow92archiveMar 29
↳ replying to @SlowLedger42

Simply balancing what you eat against what you burn won't hold up forever when a deeper metabolic problem is involved, just as forcing a cheerful outlook fails to ease major depression. It's not feasible to will yourself into a better mood if a chemical disruption is fueling the whole issue. In some situations prescriptions end up necessary to restore balance. Carrying extra weight follows the same pattern. Those particular medications don't offer an easy exit; they instead fix the initial imbalance that left hunger impossible to control from the beginning. This is what brings us to the discussion.

BlueSignal52archiveMar 29

I used to accept the energy balance idea without questioning it much until this discussion caught my attention. Evidence on the topic looks like it's expanding and future work on metabolism focused on individuals would be welcome. Over time custom strategies based on personal metabolic traits should replace broad universal methods.

SlowLedger42archiveMar 29
↳ replying to @WarmMeadow92

I might not fully grasp what people intend by that abbreviation. It usually stands for the notion that managing intake while treating expenditure as steady lets someone forecast weight shifts from the gap between them. Is that not your meaning here? The approach can fall short even without any metabolic condition present. Those lacking such conditions actually encounter larger shortfalls, since their systems adjust most readily to match varying fuel amounts.

Progress on nutrition research looks unlikely in the near term, though drug development will continue. Two main obstacles limit work on food influences. Discovering an optimal eating pattern that restores healthy weight with little effort would cut earnings across medical fields centered on ongoing illness management. No one tied to those earnings wants that fixed, and government bodies tend to follow lobby pressures instead. Only a wealthy individual treating it as a personal cause might shift the situation.

Even setting that aside, ethics panels would block proper tests anyway. One British researcher attempted to examine shifts toward very low carbohydrate eating but could not secure approval, since the plan appeared risky and untested. Approval arrived only after reversing the design so long-term users of that approach switched to official guidelines, checking whether health markers improved. Outcomes aligned with expectations, showing declines on the standard plan. Separate investigations into reduced carbohydrate methods arose from a project backed by a wealthy individual. Most current trials on lowering carbs barely trim intake from around forty percent of macros down to thirty, which falls well short of what counts as genuinely low in this space.

I am not suggesting any particular plan holds the solution, only pointing out the barriers to solid investigation beyond personal trials. Personal experiments therefore remain the main route to fresh insights, which feels unfortunate overall.

BlueSignal52archiveMar 29
↳ replying to @SlowLedger42

Those arguments seem reasonable and not easy to contest. It's gloomy yet probably correct. Still, that's one reason groups like this hold value. People describing their authentic findings provides nearly impartial details for now.

SlowLedger42archiveMar 29
↳ replying to @BlueSignal52

One issue that arises is how followers of various eating plans often split off into their own separate circles. While not matching the separation seen in faith-based groups, the most vocal supporters of approaches like low-carb, plant-only, meat-focused, or ancestral styles start tying these choices to who they are, treating any criticism of the plan as a slight against themselves. I noticed that communities drawing in individuals who've tested multiple styles, seen both wins and setbacks, and bring some knowledge of research tend to offer good chances for discussion and comparison, even if the research part isn't essential. Eventually I shifted away from viewing this mainly as shedding pounds and instead focused on figuring out the reasons behind current health problems, where losing weight is just one element. This way feels gloomier, yet I believe it has better odds of producing real progress.

IronThistle42archiveMar 29

People around here clearly waste far too many idle hours. The full writeup ends up being far too lengthy so I skipped right over it. Too long and I skipped over it. Results vary for everyone, chuckle.

SlowLedger42archiveMar 30
↳ replying to @IronThistle42

I appreciate you sharing those ideas in the conversation we're having.

CopperSignal27archiveMar 30

Estimating the output side of calorie balance isn't completely impossible in my view. Observing body mass shifts helps reveal it though. It's straightforward to track reductions in weight, and mine happened steadily at six kilograms each month. Multiplying that by the energy in fat tissue gives a monthly shortfall of around forty-six thousand calories, equating to roughly fifteen hundred daily. With consumption near sixteen hundred, that points to high burn rates. The extra body mass at one hundred forty-five kilos likely contributes, plus perhaps elevated metabolism when heavier and overeating. That might account for expending more than three thousand calories daily despite barely moving and staying in bed almost all the time. After dropping weight and increasing movement, shifting from no exercise to three hours of walking daily didn't alter the burn rate inferred from weight changes.

SlowLedger42archiveMar 30
↳ replying to @CopperSignal27

🤔 Didn't I already cover this idea when I wrote back half a day earlier? Edit: Maybe my wording ended up unclear because I picked terms like estimate and derived that overlap a bit. What I meant to get across was that fancy gear might gauge the value straight off yet still amount to a guess in the end since those tools depend on loose readings. I wanted to set apart that direct gauging method from using equations to calculate the result where energy use never gets read straight but instead gets figured from known numbers along with the notion that the calories balance idea holds up. Looking at it now I see I should have worded things better and that's on me.

SlowLedger42archiveMar 30
↳ replying to @CopperSignal27

I noticed the same pattern before those meds. Back then, workouts barely shifted my results at all. It must have helped a little, yet the impact stayed tiny next to changes in what I ate. People focused on energy balance might claim burning rose while moving, but hunger likely drove extra intake or movement fell off at other times, leaving the full-day total nearly unchanged.

SlowLedger42archiveMar 30

If people want to check out the papers behind the research points from my first message and one follow-up, I've listed them here. One paper showed how stopping excess glucagon output fixed blood sugar problems in rodents with type 1 diabetes and returned levels to normal without any insulin shots. A different report described a rat feeding trial where the group given a certain compound dropped more weight than a matched set eating identical calories but receiving nothing extra. There's also work on ground squirrels that changed fat types in their meals and tracked effects on weight gain plus ability to hibernate, where more of one fat led to bigger gains and full success at the seasonal state while lower amounts caused failure or early exit.

KeenKettle43archiveApr 16

I'm wondering how this applies when I'm working to shed some pounds. Should the numbers on the label decide what goes on my plate? Does everything have to come from unprocessed sources? Basically I'm trying to sort out which sources of energy from meals count as helpful and which don't.

SlowLedger42archiveApr 16
↳ replying to @KeenKettle43

What I wrote doesn't give directions on dropping pounds. It just points out how the heavy emphasis on tracking energy intake lacks solid evidence and rests on weaker ground than most assume. Folks realize newspaper astrology columns aren't meant for real decisions, yet they still accept the notion that weight loss comes down to simple math because experts repeat it. I have no idea which eating style might suit anyone. Each option brings its own upsides and downsides, with results varying by individual. Those medications work well, and since you're already involved with them, they likely offer the strongest path. If checking out other eating styles appeals, I spent time in the main online groups around each one and gave them a few weeks to see how they felt. The math approach could be tested too, though keeping it going long term tends to be tough without those medications.

WarmSparrow81archiveApr 16
↳ replying to @KeenKettle43

Checking the listed energy for nuts makes it clear that calorie counting isn't always reliable. Research finds they supply up to twenty six percent less than previously believed when looking at the energy actually taken in by the body. Fiber impacts how much gets absorbed in addition.

PatientSparrow76archiveJun 28
↳ replying to @WarmSparrow81

That whole thing with my grandmother blocking me from grabbing those salty snacks out of the container in her vehicle seemed ridiculous. She figured even a tiny bit might cause weight gain. The number of calories printed on the wrapper only backed up her idea, which cracked me up. I feel like fully embracing a habit of munching on nuts whenever I want.

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