Nutrition

Nutrition is the single biggest lever you have. Training, sleep, and supplementation all matter — but none of them compensate for a broken diet. The klatiPRO nutrition framework ties together the three macronutrients (protein, fats, carbohydrates) and the digestion process.

Key takeaways

• Calories matter, but source matters more — high-protein diets burn roughly 160–240 extra kcal/day from thermic effect alone; calories are necessary but not the whole picture
• Protein is non-negotiable — the protocol targets 2g/kg goal body weight for adults training regularly, 30–40g per meal, from high-quality animal sources; the only macronutrient your body cannot store for later use
• Fat builds hormones and membranes — saturated for cooking, olive oil daily, omega-3 from fish; fat-soluble vitamins need dietary fat to absorb
• Carbs are strategic fuel — the protocol uses 150–300g/day for active adults depending on training volume, front-loaded to morning/afternoon, from potatoes, rice, oats, fruit; fiber is the most important carbohydrate for long-term health
• Bioavailability varies dramatically — heme iron absorbs 5–10× better than plant iron; alpha-linolenic acid (ALA) barely converts to EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid); cooking and vitamin C improve absorption
• Combining protein + fat + fiber with carbs — associated with 20–50% smaller glucose spikes compared to carbs alone in controlled studies
• Source quality changes nutrient content — wild-caught small fish have dramatically more omega-3 than farmed; eggs from hens that range outdoors can have 3–4× more vitamin D; grass-finished beef has 2–5× more omega-3 and CLA (conjugated linoleic acid) than grain-fed
• Ultra-processed food is the primary enemy — more than fat, carbs, or salt; its industrial formulations are associated with gut barrier damage, satiety override, and chronic disease

Energy balance — necessary but not the whole picture

Calories determine whether you gain or lose weight. This law of thermodynamics doesn’t break.

• Surplus → weight gain (ideally muscle if training + adequate protein)
• Deficit → weight loss (ideally fat if protein is high + resistance training)
• Maintenance → body recomposition possible if protein and training are optimized

But the source of those calories matters:

• 100 calories from chicken breast don’t behave the same as 100 calories from sugar
• Protein costs 20–30% of its calories just to digest (thermic effect)
• Fat costs 0–3%, carbs 5–10%
• Fiber calories are partially or fully offset by fermentation and SCFA production

This is why high-protein diets have a metabolic advantage — they burn more energy during digestion and preserve muscle, which is itself metabolically active tissue.

The three macronutrients

Each macro has a distinct role. Your body needs all three, but the proportions and sources matter.

Protein — build and repair

Protein provides the amino acid building blocks for muscle, enzymes, hormones, immune cells, and structural tissue. It’s the only macronutrient your body can’t store — you need a steady supply.

Protocol target: 2g per kg of goal body weight per day for adults aiming to build or maintain muscle with resistance training, split across 2–4 meals with at least 30–40g net protein per meal.

Why this target:

• Each meal needs ~30–40g to trigger meaningful muscle protein synthesis (the leucine threshold is ~2.5–3g, which requires roughly this amount of whole protein)
• Spreading intake across meals keeps amino acid levels elevated through the day
• Higher protein increases satiety and thermic effect

Quality matters: digestibility, amino acid completeness, and heavy metal contamination vary widely by source. See the full protein post for net protein utilization (NPU), digestible indispensable amino acid score (DIAAS), and heavy metal data.

Fat — hormones, membranes, and energy

Fat builds cell membranes, insulates nerves, produces hormones (testosterone, estrogen, cortisol), absorbs fat-soluble vitamins, and is the primary energy store.

Protocol approach: emphasis on saturated fats for cooking (stable at heat), monounsaturated fat daily (olive oil), and omega-3 from fish + supplementation. Minimize seed oils and eliminate trans fats.

See the full fats post for the omega-6:omega-3 ratio, cooking stability, cholesterol science, and the seed oil debate.

Carbohydrates — fuel and fiber

Carbs are the preferred fuel for high-intensity work. Your muscles and brain run on glucose. Fiber (technically a carbohydrate) feeds gut bacteria and produces short-chain fatty acids (SCFAs) essential for gut barrier integrity.

Protocol approach for active adults: 150–300g/day depending on training volume and calorie budget, front-loaded to morning/afternoon, sourced from potatoes, rice, oats, fruit. Fructose limited to whole fruit (<20g/day men, <15g/day women from non-fruit sources).

See the full carbohydrates post for glycemic index (GI) vs glycemic load (GL), fructose metabolism, resistant starch, fiber types, and carb timing.

Thermic effect of food (TEF)

Your body burns energy just to digest, absorb, and process food. This is called the thermic effect and it varies dramatically by macronutrient:

What this means in practice:

• 100 kcal from protein → net ~70–80 kcal after digestion
• 100 kcal from carbs → net ~90–95 kcal
• 100 kcal from fat → net ~97–100 kcal

This is the metabolic advantage of high-protein diets. Eating 200g of protein per day burns roughly 160–240 kcal extra just from digestion — equivalent to 30 minutes of walking.

Micronutrient essentials

Vitamins and minerals don’t provide energy but control nearly every metabolic process. Modern diets commonly fall short in several:

Common deficiencies

Nutrient density — the NRF concept

Not all foods are equal calorie-for-calorie. Nutrient-Rich Food (NRF) scoring measures how many beneficial nutrients a food provides relative to its calorie content.

The NRF index sums 9 positive nutrients (protein, fiber, vitamins A/C/D/E, calcium, iron, potassium) and subtracts 3 negative ones (saturated fat, added sugar, sodium), all normalized per 100 kcal.

High NRF: leafy greens, liver, eggs, salmon, berries, legumes Low NRF: refined grains, sugar-heavy snacks, deep-fried foods, ultra-processed products

This is the concept behind the klatiPRO food database — the NRF score is calculated for every food so you can compare nutrient density across the entire spectrum.

Bioavailability — not all nutrients absorb equally

The amount of a nutrient in food is not the amount your body absorbs. Bioavailability varies by:

Form of the nutrient

What increases absorption

• Vitamin C + non-heme iron: vitamin C can double or triple non-heme iron absorption
• Fat + fat-soluble vitamins: vitamins A, D, E, K absorb 3–10× better with dietary fat
• Fermentation: reduces phytic acid in legumes and grains → better mineral absorption
• Cooking: breaks down cell walls, denatures anti-nutrients → more accessible nutrients
• Adequate stomach acid: essential for iron, B12, calcium, zinc, magnesium absorption

What decreases absorption

• Phytic acid (legumes, grains, nuts) → binds iron, zinc, calcium
• Oxalates (spinach, beet greens) → bind calcium
• Tannins (tea, coffee) → bind iron and protein
• Calcium and iron compete → don’t take calcium supplements with iron-rich meals
• High-dose zinc competes with copper → long-term high zinc without copper → copper deficiency

See the digestion post for the full anti-nutrient table and how preparation reduces them.

Food source quality — not all chicken is the same chicken

Bioavailability tells you how well a nutrient absorbs. But the amount of that nutrient in the food before absorption varies dramatically based on how the animal was raised or the plant was grown. Two chicken breasts can look identical and have very different nutrient profiles.

Wild-caught vs farmed fish

Practical takeaway: wild-caught small fish (sardines, mackerel, anchovies, herring) are the best option — high omega-3, low mercury, no farming concerns. Wild-caught salmon is excellent but more expensive. Farmed salmon is still better than no fish — the omega-3 content is lower but not zero. The hierarchy: wild small fish > wild salmon > farmed salmon > no fish.

Grass-fed/finished vs grain-fed beef

Important distinction: “grass-fed” and “grass-finished” are different. Some cattle eat grass early then switch to grain in feedlots for fattening. Only “grass-fed AND grass-finished” (or “100% grass-fed”) means the animal ate grass its entire life. Labels vary by country — check certifications.

Practical takeaway: grass-finished is nutritionally superior, but conventional beef is still a high-quality protein source. If budget is limited, prioritize wild fish over upgrading beef.

Pastured vs conventional eggs

Practical takeaway: pastured eggs are one of the cheapest nutrient upgrades available. The yolk is where the quality difference concentrates — eat the yolk. “Free-range” and “cage-free” are weaker standards than “pastured” — they may only mean access to a small outdoor area.

Organic vs conventional produce

This one is more complex than the marketing suggests:

• Pesticide residue — organic produce has lower synthetic pesticide levels (organic farming uses natural pesticides, which are not necessarily safer). Washing and peeling removes most surface residue from conventional produce
• Nutrient content — evidence for a nutrient advantage of organic over conventional food is limited and inconsistent; soil quality and freshness matter more than the organic label
• The “Dirty Dozen” approach — if budget is limited, buy organic for thin-skinned produce that absorbs more pesticides (strawberries, spinach, apples, grapes) and buy conventional for thick-skinned produce (avocados, bananas, onions, melons)

Practical takeaway: organic certification doesn’t guarantee higher nutrient content. Local, seasonal, recently harvested produce often beats out-of-season organic shipped from across the world — freshness degrades nutrients faster than farming method improves them.

The priority ladder for food quality upgrades

When budget forces choices, upgrade in this order (highest impact first):

1. Wild small fish over farmed large fish — biggest omega-3 and contaminant difference
2. Pastured eggs over conventional — cheap upgrade, large nutrient difference in the yolk
3. Organic “dirty dozen” produce — reduces pesticide exposure where it matters most
4. Grass-finished beef over conventional — meaningful but smaller nutrient difference than fish or eggs
5. Local/seasonal produce over imported organic — freshness often outweighs farming method

Meal composition — how combining foods changes everything

Eating macronutrients together changes how your body responds compared to eating them alone.

Protein + fat + fiber = flattened glucose curve

Adding protein, fat, or fiber to a carbohydrate-containing meal:

• Slows gastric emptying → slower glucose entry into the bloodstream
• Reduces peak blood glucose by 20–50% compared to carbs alone
• Reduces peak insulin by a similar margin
• Increases satiety → less total food intake over the day

Practical example:

• White rice alone → fast glucose spike, fast insulin spike, hungry again in 2 hours
• White rice + salmon + vegetables → slower absorption, lower peak, fuller longer
• Cooled rice + salmon + vegetables → even better (resistant starch reduces available glucose further)

Order of eating matters

Emerging research suggests that eating fiber and protein before carbohydrates in a meal reduces the glycemic response more than eating everything mixed together. The fiber and protein slow gastric emptying before the carbs arrive.

Individual variation

No single diet works identically for everyone. Key genetic and environmental factors:

Genetic variation

• CYP1A2 — determines caffeine metabolism speed; fast metabolizers clear caffeine in ~3 hours, slow metabolizers in 7–9 hours. See caffeine
• FTO (fat mass and obesity-associated) gene variants — associated with appetite regulation; some variants increase hunger signaling, making caloric surplus easier
• ApoE4 — affects cholesterol metabolism; carriers may need to limit dietary cholesterol and saturated fat more than others
• MTHFR (methylenetetrahydrofolate reductase) — affects folate metabolism; common variants may need methylfolate instead of synthetic folic acid
• Lactase persistence — genetic variation determines whether you produce lactase into adulthood; ~65% of the global population reduces lactase production after childhood

Microbiome variation

The same food produces different glucose responses in different people — partly because their gut bacteria process it differently. A study that tracked 800 people found that individual glucose responses to identical meals varied by up to 4×. Factors: microbiome composition, sleep quality, stress level, recent meals, meal timing.

Activity level

• Sedentary person and competitive athlete have very different carb needs (roughly 150g vs 400g+ per day depending on training volume)
• Training is associated with improved insulin sensitivity → muscles absorb glucose more efficiently
• Resistance training increases resting metabolic rate through added muscle mass
• Post-workout nutrition window: real but overblown — total daily intake matters more than exact timing

Ultra-processed food — the primary enemy

Ultra-processed foods (UPFs) are industrial formulations with ingredients you wouldn’t find in a kitchen: emulsifiers, thickeners, artificial colors, hydrogenated oils, high-fructose corn syrup, artificial sweeteners, and preservatives.

Research consistently shows that a 10% increase in ultra-processed food consumption is associated with:

• Higher all-cause mortality
• Higher cardiovascular disease risk
• Higher rates of metabolic syndrome, type 2 diabetes, and obesity
• Gut barrier damage (emulsifiers directly increase intestinal permeability)

Why UPFs are different from whole foods with the same macros:

• Engineered for hyper-palatability → overrides natural satiety signals
• Low nutrient density despite high calorie density
• Contains inflammatory additives (emulsifiers, trans fats, excessive omega-6)
• Lacks fiber, polyphenols, and protective compounds found in whole foods
• Often contains compounds that damage the gut barrier

The klatiPRO rule is simple: if you can’t identify every ingredient, don’t eat it.

Putting it all together — the klatiPRO nutrition framework

Each of these principles is explained in depth in the linked posts. The protocol page (klatiPRO) puts it all into a daily routine.

• check klatiAPPROVED for klati approved sources

Research