Kcalm Research

Nutrition5k: Towards Automatic Nutritional Understanding of Generic Food

Dr. Maya Patel — Wed, 11 Mar 2026 00:00:00 GMT

A landmark CVPR 2021 study introducing a 5,006-dish dataset with video, depth, and nutritional annotations — enabling computer vision models that outperform professional nutritionists at predicting calories and macronutrients from food images.

Healthy Eating Index (HEI-2020): The Science of Measuring Diet Quality

Dr. Maya Patel — Wed, 11 Mar 2026 00:00:00 GMT

How the USDA Healthy Eating Index and Harvard Alternative Healthy Eating Index score diet quality across 13 components — and what decades of validation research reveal about their link to chronic disease and mortality.

NOVA Food Classification: Understanding Ultra-Processed Foods

Dr. Maya Patel — Wed, 11 Mar 2026 00:00:00 GMT

The NOVA system classifies all foods into four groups by degree of processing. Large cohort studies now link ultra-processed food consumption to obesity, cardiovascular disease, and all-cause mortality.

Dietary Reference Intakes: The Science Behind Nutrient Recommendations

Dr. Maya Patel — Wed, 11 Mar 2026 00:00:00 GMT

EAR, RDA, AI, UL — the NASEM Dietary Reference Intake framework underpins every nutrition label and dietary guideline. Understanding these concepts reveals why nutrient flagging thresholds matter.

Global Dietary Guidelines on Sugar, Sodium, and Fat

Dr. Maya Patel — Wed, 11 Mar 2026 00:00:00 GMT

A comparative review of dietary limits from the WHO, American Heart Association, and Dietary Guidelines for Americans — where they converge, where they differ, and the evidence behind the numbers.

The Three-Process Model of Alertness

Dr. Maya Patel — Wed, 11 Mar 2026 00:00:00 GMT

Åkerstedt and Folkard's 1987 model describes how homeostatic sleep drive, circadian rhythm, and sleep inertia interact to shape daily alertness — validated across 35+ years of military and aviation research.

SAFTE/FAST: How the US Military Predicts Fatigue

Dr. Maya Patel — Wed, 11 Mar 2026 00:00:00 GMT

The Sleep, Activity, Fatigue, and Task Effectiveness model — developed at Walter Reed Army Institute of Research — is the gold standard for biomathematical fatigue prediction. But it has zero nutrition inputs.

Dehydration and Cognitive Performance: A Meta-Analysis of 33 Studies

Dr. Maya Patel — Wed, 11 Mar 2026 00:00:00 GMT

A systematic meta-analysis finds a small but highly significant effect (ES = -0.21, P < 0.0001) of dehydration on attention, executive function, and motor coordination — even at mild levels of 1-2% body mass loss.

The PREDICT Study: Personalized Nutrition at Scale

Dr. Maya Patel — Wed, 11 Mar 2026 00:00:00 GMT

The largest personalized nutrition study ever conducted found that identical twins show different metabolic responses to the same foods — gut microbiome, meal timing, and sleep matter more than genetics alone.

Chrononutrition: How Meal Timing Affects Metabolic Health

Dr. Maya Patel — Wed, 11 Mar 2026 00:00:00 GMT

Time-restricted eating research shows that a 10-12 hour eating window improves insulin sensitivity and metabolic markers — independent of calorie intake. When you eat matters as much as what you eat.

Glucose Variability and Cognitive Performance

Dr. Maya Patel — Wed, 11 Mar 2026 00:00:00 GMT

Glucose spikes and crashes impair attention, memory, and executive function with a striking r=0.83 correlation between glycemic variability (MAGE) and cognitive scores — even in non-diabetic adults.

Caffeine Pharmacokinetics: The Science Behind Your Coffee

Dr. Maya Patel — Wed, 11 Mar 2026 00:00:00 GMT

Caffeine blocks adenosine receptors within 20 minutes, peaks at 45 minutes, and has a half-life of 4.5-6.4 hours. Its dose-response follows an inverted-U curve — 200mg is optimal, 400mg+ shows diminishing returns.