Nutrition investigations

Updated 10 Oct 2026

Some useful questions cross nutrient boundaries. These investigations follow foods and eating patterns, the demands of training, performance supplements, and newer experimental ideas. Each connects the relevant evidence to a practical decision and keeps the outcome being tested clear.

Food choices

Taste, portions and the evidence behind an optional food change.

Which fruit change would make this diet better?Kiwi, berries, melon and the limits of translating fruit-extract research into everyday food.
Walnuts, almonds or macadamias?Different nutrient contributions, modest human lipid results and a practical reason to keep the nuts I enjoy.
What would cocoa, matcha, coffee or tea actually add?Enjoyable drinks, outcome-specific bioactive research, caffeine and the difference between a food and an extract.
Cocoa flavanols at a desk and around trainingWhat recent trials show about artery-function measurements, what they do not show about performance, and why cocoa exposures cannot be read from a chocolate percentage.
Linoleic acid, omega-6 and the seed-oil questionEssential-fat references, missing food measurements and what human dietary trials actually show about inflammation.
Coffee, tea and the cost of alertnessWhat randomized coffee days, recent dementia associations and theanine experiments change about a drink chosen for daily life.
Are mushrooms a useful food or a brain supplement?Vitamin D from verified UV treatment, ergothioneine associations and the mixed human results for lion's mane.
Ergothioneine: what did the human mushroom and capsule trials change?New 2025–2026 trials distinguish absorbed exposure, selected memory and sleep findings, and the case for an ordinary mushroom meal.
Yogurt, dairy fat and the food matrixWhat controlled food comparisons establish about full-fat versus nonfat yogurt, cheese versus butter, and whether another dairy product would improve this diet.
What are the herbs in chimichurri doing?Flavor, uncertain herb quantities, a mixed-spice blood-pressure trial and the small effects of chilli.
Iodine in yogurt, fish and saltWhy plausible iodine sources still leave my daily quantity unknown.
Rice, arsenic and the microwave pouchWhat product tests, cooking experiments and current exposure references can establish about a convenient daily staple.
How can small fish stay enjoyable without so much salt?A practical comparison of sardines, cured anchovies and other seafood, with portion, mercury and storage questions kept distinct.
Whole nuts, butter and measured energyWhat controlled balance experiments establish, and why my calorie estimate stays an estimate.
Choosing seafood by species, taste and actual monitoringSmall oily fish make sense, but mercury, sodium, and source-specific contamination answer different questions.
Cocoa contaminants, serving size and the limits of product testsLead and cadmium results deserve context: concentration, amount, frequency and test scope determine what a finding means.
Carotenoids, preparation and the existing mealWhat carrot feeding studies establish about uptake, vitamin A conversion and a manageable food swap.
Whole fruit, smoothies and juice: what changes?Fullness, food intake and glucose are different outcomes.
Pomegranate and trainingFruit, juice and extracts differ.
Matcha, attention, stress and sleepWhole-leaf matcha trials offer narrower results than promises of calm focus, better sleep or faster muscle growth.

The whole eating pattern

Questions about meals, hydration, storage and repeated observations.

Food patterns and the food matrixWhat dietary-pattern and controlled-feeding trials add to a nutrient table, and what their results cannot isolate.
Fermented foods and the microbiomeYogurt is already part of my routine; the research adds specific possibilities without turning microbial diversity into a health diagnosis.
Hydration, electrolytes and saunaMy unmeasured hydration, proposed observations and contrasting training studies.
Meal combinations, raw eggs and storageMaking the foods work as enjoyable meals, with useful absorption interactions and practical limits on all-day dairy drinks and leftovers.
Calibrating energy and body compositionWhy body weight, appetite and time at the gym do not establish maintenance calories, and how repeated observations can improve the estimate.
Late meals, appetite and sleepWhat changing the arrangement of existing food might accomplish, without inventing a fasting window or a bedtime cutoff for late training.
Fluoride and drinking-water exposureWhy fluoride needs dental and water context rather than a food-table deficiency flag, including current San Francisco measurements and unresolved lower-exposure research.
Calorie restriction, aging and the demands of trainingWhat the CALERIE trial changed in metabolic risk markers, biological-aging estimates, bone and physical function—and how those results relate to a diet being rebuilt around heavy training.

Training and recovery

Enough food, connective tissue and performance supplements.

Collagen, broth and connective tissueWhat collagen studies actually measure, where the clinical evidence reaches, and what that means for a broth preference.
Creatine: exposure, timing and what actually improvedRecent human trials separate muscle stores, training outcomes, body composition, sleep and cognition—and leave fewer reasons to chase a precise workout window.
Buffers, beetroot and the actual effortBeta-alanine, bicarbonate and nitrate have different exposure requirements, and recent trials show why a short sprint, repeated set and fatigued time trial need separate judgments.
Enough energy to train and recoverWhy calorie estimates, appetite and energy availability answer different questions, including what is known in men.
Performance supplements with a specific jobCreatine, caffeine, nitrate and beta-alanine answer different performance questions; useful effects and tradeoffs depend on the test.
Antioxidants, training and the food–supplement distinctionCellular adaptation, performance and recovery markers do not always move together; high-dose vitamin experiments are not a verdict on fruit.
Protein timing and the foods I already eatWhether ayran throughout the day, an evening chicken meal and ordinary foods warrant a stricter protein schedule or different purchases.
Carbohydrate timing and the actual sessionWhen pre-workout food, carbohydrate drinks and recovery timing change performance—and what that means for brief sprints and low-volume lifting.
Ginger, turmeric and pineapple: soreness is not injury healingPositive, null and newer human trials separate pain relief, restored function and tissue repair—and ordinary food from concentrated preparations.
Fish oil and muscles: which outcome matters?Laboratory protein synthesis and older-adult strength answer different questions.
Ketone drinks: performance, recovery and cognitionNew human trials distinguish raised blood ketones from better training, recovery or thinking, and distinguish monoesters from salts and other compounds.
Sleep, appetite and what recovery studies measureHuman experiments connect sleep with eating and muscle measurements; their limits matter when interpreting a training diet.
Collagen: food exposure and functional outcomesCloser readings of broth composition, tendon measurements and newer athlete studies.

Nutrients working together

Protein and energy, bone loading, food absorption and laboratory interpretation.

Protein, available energy and trainingWhy a protein target cannot substitute for enough energy, and why acute synthesis, lean-mass changes and performance are distinct outcomes.
Calcium, vitamin D and the loading of boneWhat supplementation and exercise trials establish about bone, and why a calcium-rich food log does not settle vitamin D status or injury care.
Iron absorption without turning meals into a timetableVitamin C, dairy and tea interact with iron, but acute absorption experiments and long-term iron status answer different questions.
When supplements change the meaning of a blood testBiotin can interfere with assays, while creatine can complicate creatinine interpretation; neither permits ignoring an abnormal result.
Why potassium can exceed sodiumWhere the potassium in my food estimate comes from, what restaurant salt leaves unknown, and what blood-pressure trials actually establish.
Vitamin D, blood tests and clinical outcomesHow ordinary adequacy, testing, training, respiratory illness and aging studies answer different questions.
Vitamin K2 and coronary calcificationNew 2026 imaging trials, earlier counterevidence and limits of clinical interpretation.
Resveratrol, exercise and grapesFunctional outcomes from supplement trials, with a separate decision about grapes.
Fish oil: formulation, outcomes and actual risksWhy REDUCE-IT and STRENGTH differed, what their absolute benefits and harms were, and what this means for small fish and lifting.
B vitamins and homocysteine: what changed in humans?Positive and null trials separate a lower blood marker from better health.

Experimental interventions

Compound identity, exposure, human outcomes and unresolved tradeoffs.

Peptides: precision is something to demonstrateTarget selectivity, exposure and measured human outcomes are different kinds of precision.
BPC-157, TB-500 and GHK-Cu: what has been tested in people?Separate compound identity, route and recovery outcomes before combining promising signals.
Growth-hormone drugs: a biomarker is not the resultCJC-1295, ipamorelin, tesamorelin and ibutamoren differ in identity, evidence and intended population.
Longevity research: exposure, biomarkers and useful outcomesMOTS-c, epitalon and NAD precursors have very different human evidence, including consequential new results from 2026.
Incretin drugs: weight, muscle and useful outcomesWhat GLP-1, dual and triple agonist trials establish, including the September 2026 retatrutide results.
Glycine, NAC and GlyNAC: what changed in humans?Older-adult signals, a larger null trial and the gap between antioxidant markers and useful recovery.
Myostatin and activin: more tissue, more function?Muscle-directed therapies, the 2026 obesity combination trials and a newly approved treatment for spinal muscular atrophy.
Spermidine: exposure, autophagy and human outcomesA primary memory null, selected immune and imaging signals, and the question of useful function.
Taurine, aging, and performanceAnimal lifespan findings, contradictory human aging data, and what small exercise trials actually show.
Urolithin A and the gap between cells and performanceHuman muscle, running, and immune trials provide real signals alongside important null results.
Rapamycin, immune function, and trainingDifferent mTOR drugs have produced vaccine signals, failed infection trials, and a new exercise result that challenges assumed synergy.
Metformin and the assumption that healthy interventions add upDiabetes prevention evidence, muscle-adaptation trials, and new functional results do not establish a benefit for healthy training.
Senolytics and the first useful human questionsA new randomized liver-disease result is promising, while bone and lung trials show why cell-clearance claims need specific outcomes.
NAD precursors: exposure and training functionPositive thresholds, primary nulls and the crucial exercise comparator.
Elamipretide: a peptide tested against physical functionBlinded results, uncontrolled extensions and the limits of disease-specific approval.

How to read the evidence

Intake references, measurements and the decisions they can support.

Reading intake references without inventing a minimum and maximumWhat RDA, AI, EAR, UL, CDRR, AMDR and Daily Value mean, and how they fit a personal food record.
What a nutrition trial actually provesRead the outcome, comparator and analysis before turning an interesting result into a food or supplement decision.
Knowing what a supplement actually containsIngredient identity, dose, label units and independent testing must be checked separately from evidence of benefit.

Reading an intervention

The relevant questions are what it changes, at what exposure, in which population, and with what demonstrated outcome. A result in cells, a change in a blood marker and an improvement in people's health or performance establish different things. The sections retain these distinctions beside their claims.

The notebook holds the current decisions. The food record shows what I actually ate and how that felt.