Diets · honest read
Paleo
Whole foods by category rule. The food quality is the mechanism - not the stone-age story.
carbs 25–40% · protein 25–35% · fat 30–45% of calories
What it is
Paleo is a whole-foods eating pattern built on meat, fish, eggs, vegetables, fruit, nuts, and seeds - and defined just as much by what it leaves out: grains, legumes, dairy, added sugar, and sweeteners. The framing is evolutionary - eat roughly what pre-agricultural humans ate - but the practical effect is simpler than the story. Nearly everything ultra-processed disappears from your plate in a single move.
Unlike keto, paleo is not a low-carb diet by definition. Carbohydrates typically land at 25–40% of calories, coming from fruit and starchy vegetables like sweet potato and squash, with protein running higher than in most standard diets. There is no counting requirement built in: the rules are about food categories, not numbers.
How it works day to day
Meals center on a protein - meat, fish, or eggs - plus vegetables, with fruit and nuts filling the snack and dessert slots. Breakfast is usually the biggest adjustment, since cereal, toast, oatmeal, and yogurt are all off the list; eggs and leftovers become the default answer.
Label reading matters less here than in most diets, because most paleo-compliant food has no label. The work moves to shopping and cooking: the produce section, the meat counter, and a repertoire of simple meals you can actually keep up. Eating out works if you order plainly - a protein and vegetables, hold the bread, beans, and cheese.
In practice, strictness varies. Plenty of people run a looser version that readmits butter, ghee, or white rice, and the pattern still functions as a whole-foods filter. What you log is what counts - the diary tracks the diet you actually eat, not the one on the label.
Advantages
Ultra-processed food exits by default
The exclusion list removes nearly everything packaged, sweetened, and refined in one move, without requiring you to count anything. For many people that single change does most of the work.
Protein and fiber carry the satiety
Meals built on protein and vegetables are filling per calorie. Small trials report that people on paleo tend to eat less without being told to - appetite does the restricting instead of willpower.
Category rules are easy to follow
Paleo can be stated in one sentence and applied at any market, menu, or dinner table. No arithmetic, no app required at the moment of decision - which makes the rules unusually portable.
Small trials show real short-term movement
Versus standard comparison diets, small randomized trials report improvements in weight, waist circumference, and blood pressure over weeks to months. Modest, short-term, small samples - but consistent in direction.
Risks & who should be careful
If you take glucose or blood-pressure medication
A shift to whole foods with fewer refined carbs can move blood sugar and blood pressure enough to matter alongside medication. Doses are your prescriber’s to adjust - talk to them before you start, not after a low reading.
Calcium needs a plan once dairy is out
Cutting dairy removes the easiest calcium source in most diets, and it does not replace itself. Canned fish with bones, leafy greens, almonds, and tahini can cover the gap, but only if they actually show up in your week - this is worth tracking rather than assuming.
Kidney conditions, pregnancy, and breastfeeding
Paleo runs higher in protein than standard diets, so anyone with a kidney condition should involve their clinician before raising protein intake. Pregnancy and breastfeeding raise energy, calcium, and iodine needs that a restrictive pattern can miss - work with your care team rather than winging it.
You are cutting foods with good evidence behind them
Legumes and whole grains are consistently associated with favorable outcomes in large observational cohorts, and they are cheap. Dropping them is part of the rule set, not a health upgrade - go in knowing that trade-off is real.
Cost and staying power
A cart built on meat, fish, and fresh produce costs more than one built on grains and legumes, and adherence over the long haul is a known weak point in trials. The best version of paleo is the one you can still afford and still want to eat in six months.
The metabolic-health factor
Small trials show improvements in weight, waist, and blood pressure versus standard diets. The honest read on why: paleo swaps ultra-processed food for whole food and raises protein, and those two moves - not the evolutionary framing - are the likely drivers. Eating patterns that make the same moves without the paleo label tend to show similar effects.
Cutting legumes and dairy is a food-quality trade-off, not a metabolic necessity. There is no solid evidence that these foods harm metabolic health in people who tolerate them; if anything, large cohorts associate both with neutral-to-favorable outcomes. If paleo works for you, it works despite that exclusion, not because of it.
Long-term data is missing. Most trials run weeks to a few months with small groups, and no large randomized trial has followed paleo for years - so whether the short-term improvements persist, and whether the exclusions cost anything over decades, is unknown. Treat paleo as a reasonable whole-foods pattern, not proven superiority.
What recent research says
The trial base is small in every sense: randomized trials of paleo mostly enroll dozens of participants for weeks to a few months. Within that limit, the results lean consistently in the same direction - more improvement in weight, waist circumference, triglycerides, and blood pressure than guideline-based comparison diets over the short term.
Some of the earliest randomized work compared paleo against a conventional diabetes-style diet in small groups of people with impaired glucose control, and paleo came out ahead on several short-term measures. These are hypothesis-generating results from small samples - a different tier of evidence from the large, multi-year outcome trials that exist for the Mediterranean pattern, and no paleo trial of that scale has been run.
A recurring detail worth knowing: participants in paleo trials often eat fewer calories spontaneously, and much of the measured advantage appears to travel with that. Filling food that people eat less of is a perfectly good mechanism - it is just not a uniquely paleo one.
The evolutionary premise itself is on shakier ground than the food. Ancestral diets varied enormously by region and season, and humans have kept evolving since agriculture - adult lactose tolerance in many populations being the clearest example. The evidence that favors paleo supports its whole-food composition, not the origin story attached to it.
Evidence summaries, not medical advice - nutrition research moves, individual responses vary, and your clinician knows your history.
How metabomap tracks it
Set paleo as your diet in metabomap and the macro calculator anchors your targets to the paleo shape - carbs 25–40%, protein 25–35%, fat 30–45% of calories - scaled to your body and goal. Every food you log lands against those targets, with net and total carbs computed server-side on each entry. Sugar alcohols are subtracted wholesale in that math; on paleo it rarely comes up, since sweeteners are off the menu anyway.
The weekly meal planner draws only from paleo-compatible recipes - no grains, gluten, legumes, dairy, added sugar, or sweeteners - and every recipe computes per-serving nutrition from USDA-backed data. That turns the hardest part of paleo, the constant cooking decisions, into a list you shop once.
Because dropping dairy makes calcium the number to watch, the micronutrient report (Premium) shows what your actual logged food delivered - not what a pamphlet assumes. Weight and blood pressure logging cover the two outcomes small trials move most, charted over weeks so you judge the trend instead of this morning. If you pair paleo with an eating window, fasting tracking runs alongside, and sleep logging rounds out the picture.
Questions, answered
Is paleo the same as keto?
No. Paleo typically runs 25–40% of calories from carbohydrate - fruit and starchy vegetables are staples, not violations. You can eat paleo foods at keto carb levels if you choose, but the default paleo shape is moderate-carb, and metabomap tracks each pattern on its own terms.
Do I really have to give up dairy?
The rule set says yes; the evidence is less demanding. There is no solid evidence that dairy harms metabolic health in people who tolerate it - cutting it is a paleo convention, not a metabolic necessity. Plenty of people run paleo-plus-dairy, and the diary tracks whatever version you actually eat.
Will I lose weight on paleo?
Small trials show more weight and waist loss than standard diets over weeks to months, most likely because whole foods and protein make it easy to eat less without counting. There is no guarantee and no long-term trial behind it - your own diary and weight chart are the honest answer for you specifically.
Where does calcium come from without dairy?
Canned salmon or sardines with the bones, leafy greens, almonds, and tahini are the workhorses - but they only count if they actually appear in your week. The micronutrient report (Premium) shows what your logged days really delivered, and if bone health is a live concern for you, that is a conversation to have with your clinician.