Sports Nutrition

Ramadan and Elite Sport: How Muslim Athletes Train Through the World's Most Demanding Fast

60-90% of Muslim professional athletes fast during Ramadan while competing. Here's what the evidence says about managing sleep, hydration, and training load.

5 min read · 2026-10-27

The Athlete Who Eats Less to Perform Better Is Often the One Whose Performance Deteriorates Fastest.

RED-S — relative energy deficiency in sport — impairs performance across nine physiological systems simultaneously. The threshold is energy availability below 30 kcal per kilogram of fat-free mass per day, and it occurs in both male and female athletes across all sports.

5 min read · 2026-10-27

The Adaptogen That Blunts Cortisol Without Dulling Performance: Rhodiola Rosea Explained

Rhodiola rosea reduces perceived effort and cortisol without sedation. Learn what the clinical data actually shows and how to apply it for training and recovery.

5 min read · 2026-10-27

Pre-Competition Nutrition: The 48-Hour Protocol That Protects Your Race

The 48 hours before competition are about elimination, timing and precision — not eating more. Fibre traps, glycogen topping, sodium loading and race-morning timing are the variables that separate prepared athletes from unprepared ones.

5 min read · 2026-10-20

Pre-Sleep Nutrition: Glycine, Theanine and Overnight Recovery

Three nutritional compounds with controlled trial evidence for improved sleep quality in athletes: glycine (3g), L-theanine (200mg), and tart cherry concentrate (30ml twice daily). The mechanisms are distinct and complementary.

5 min read · 2026-10-20

Pregnancy Nutrition for Active Women: What Prenatal Advice Misses

Prenatal vitamins cover folate and iron. They don't cover the full picture of what an active pregnant woman needs — and the gaps in choline, DHA, and iodine have documented consequences for foetal neurodevelopment.

5 min read · 2026-10-20

Probiotics and Post-Exercise Immunity: The Open Window Evidence

Intense endurance exercise creates an immunological open window of 3–72 hours during which URTI risk is elevated. Learn how specific probiotic strains restore mucosal SIgA, reduce illness incidence in athletes, and support immune function without blunting training adaptation.

5 min read · 2026-10-20

Protein and Bone Health: Debunking the Acid-Load Calcium Myth

The acid-ash hypothesis claimed high protein leaches calcium from bones. Fenton 2011 and subsequent meta-analyses demolished this myth. What protein actually does to skeletal health.

5 min read · 2026-10-20

Protein in a Caloric Deficit: Protecting Lean Body Mass

The 1.6g/kg protein recommendation is built for energy balance. Athletes in a caloric deficit face anabolic resistance and elevated muscle protein breakdown that shift the optimal intake to 2.3–3.1g/kg lean body mass — a target most cutting programmes fail to meet.

5 min read · 2026-10-20

The 30-Minute Anabolic Window After Training Has Generated More Supplement Sales Than Scientific Evidence. The Meta-Analysis That Should Have Ended the Myth — and Why Total Daily Protein Still Matters More.

Schoenfeld & Aragon's 2013 review and 2017 RCT demonstrated that the 30-minute post-workout protein window is not a meaningful driver of hypertrophy when total daily protein intake is equated. Distribution across 4+ meals and per-meal leucine threshold matter more than peri-workout timing.

5 min read · 2026-10-20

Quercetin and Polyphenols: Exercise Adaptation and the Blunting Catch

Quercetin and EGCG activate AMPK and SIRT1 — the same molecular switches as exercise. Here's what the human trial evidence says about performance benefits.

5 min read · 2026-10-20

Plant Protein DIAAS: The Score That Replaced PDCAAS for Vegan Athletes

PDCAAS was replaced by DIAAS as the gold standard for protein quality scoring in 2013. Most sports nutrition guidance hasn't caught up — and plant-based athletes are making supplementation decisions based on the outdated framework.

5 min read · 2026-10-13

Postpartum Return to Training: The Nutrition Science Most Athletes Ignore

Returning to sport after childbirth demands more than rest. Breastfeeding adds 500 kcal/day of demand, relaxin persists for months, and iron deficits compound. Here is the evidence.

5 min read · 2026-10-13

Powerlifters Periodise Their Training Across the Year. Most Forget to Periodise Their Nutrition. Here's What an Optimised Strength Nutrition Calendar Looks Like.

Nutrition and training stress interact. Hall 2012 shows >500 kcal surplus accelerates fat not muscle. Helms 2014 raises cut protein to 2.3–3.1g/kg. Here's the year-round framework.

5 min read · 2026-10-06

Omega-3 (EPA/DHA) for Muscle Recovery: Dose and Evidence

Omega-3 fatty acids — specifically EPA and DHA — directly potentiate mTORC1-driven muscle protein synthesis independent of leucine intake. Most athlete nutrition protocols ignore this pathway entirely.

5 min read · 2026-10-06

Paleo Diet and Athletic Performance: What Paleolithic Athletes Really Ate

The paleo diet's evolutionary logic is genuinely interesting. Its application to trained athletes — who have carbohydrate demands that hunter-gatherers matched through entirely different food sources — is more complex than the popular framing suggests.

5 min read · 2026-10-06

Two Athletes Take Identical Protein Supplements. One Absorbs 40% More Usable Amino Acids Than the Other. The Difference Is Not the Supplement — It Is the Gut Microbiome Processing It.

Your gut microbiome critically determines how much of your protein, omega-3, and micronutrient supplements are actually absorbed. Learn how gut bacteria affect bioavailability, why inter-individual variation is enormous, and what to do about it.

5 min read · 2026-09-29

Natural Muscle Gain Rate: How Much You Can Build Per Year

Lyle McDonald's rate model shows year 1 allows up to 1.1kg/month of lean mass; year 3+ drops to 0.2kg/month. Understanding the diminishing returns curve changes everything about training expectations.

5 min read · 2026-09-29

Gluten-Free Athletes and NCGS: Why 41% Probably Should Not Be

Non-coeliac gluten sensitivity in athletes: Biesiekierski 2011 and 2013, the FODMAP confound, Lis 2015 RCT showing no performance benefit, and the wheat ATI alternative explanation.

5 min read · 2026-09-29

Athletes Are Taking Magnesium for Sleep — But Most Are Using the Wrong Form at the Wrong Time

Magnesium deficiency is the most common micronutrient insufficiency in trained athletes — and its impact on sleep architecture, muscle recovery, and nervous system function is widely underestimated.

5 min read · 2026-09-22

Not All Magnesium Is Equal: Why Threonate Crosses the Blood-Brain Barrier When Glycinate Doesn't

Magnesium L-threonate uniquely increases cerebrospinal fluid magnesium and synaptic density. Here's the evidence hierarchy across magnesium forms and what it means for athlete cognition and recovery.

5 min read · 2026-09-22

Magnesium, TRPM6 and Glucose Uptake: The Overlooked Connection

Magnesium activates the TRPM6 transporter that enables insulin receptor tyrosine kinase signalling. Deficiency impairs GLUT4 translocation and post-exercise glucose uptake. Here's the mechanism athletes need to understand.

5 min read · 2026-09-22

Marine vs Bovine Collagen: Which Source Actually Works for Athletes?

Not all collagen supplements are equal. Marine and bovine sources differ in peptide molecular weight, bioavailability, collagen type, and athletic application. Here's the evidence.

5 min read · 2026-09-22

Barry Sears Said 40-30-30. The Mediterranean Diet Says Something Different — And the Data Takes Sides

The Zone Diet promises eicosanoid balance at 40-30-30 macros. The Mediterranean Diet delivers different ratios — and PREDIMED-Plus data on cardiovascular outcomes, inflammation, and performance.

5 min read · 2026-09-22

Your Athlete Isn't Burnt Out. Their Thyroid Is Starved of Iron. Here's the Overlooked Mechanism.

Low ferritin doesn't just impair oxygen transport — it starves thyroid peroxidase of its iron cofactor, impairing T4-to-T3 conversion and reducing resting metabolic rate. Here's what coaches and athletes miss.

5 min read · 2026-09-15

Calories vs Macros: What Isocaloric Metabolic Ward Studies Settle

Metabolic ward studies controlling for total calories consistently show minimal differences between macro ratios for fat loss. Learn what Sacks 2009, Hall 2015, and protein leverage theory reveal — and where macros genuinely do matter for athletes.

5 min read · 2026-09-15

L-Carnitine and Fat Transport: What the Trials Actually Deliver

L-carnitine is essential for fat oxidation via CPT1 — but supplementation fails to raise muscle carnitine without insulin co-ingestion. Stephens Wall 2007, Broad 2005 meta-analysis, TMAO risk.

5 min read · 2026-09-15

Macro Timing and Distribution: How Daily Spread Changes the Outcome

Meeting daily macro targets is the floor, not the ceiling. How protein, carbohydrate, and fat are distributed across meals directly influences muscle protein balance, glycogen replenishment, and training adaptation.

5 min read · 2026-09-15

HMB Supplementation: The Specific Use Case for Muscle Protection

HMB supplements are marketed as muscle builders for everyone. The evidence says something quite different — and far more specific. Here is what the research actually shows.

5 min read · 2026-09-08

The Intermittent Fasting Mistake That's Silently Undermining Your Training Adaptations

IF works for fat loss and metabolic health — but combining it with strength or endurance training without adjusting the eating window creates a specific problem most coaches miss.

4 min read · 2026-09-08

Iron Absorption: Haem vs Non-Haem and the Role of Hepcidin

Non-haem iron bioavailability is 1–20% depending on absorption promoters and inhibitors. Hepcidin — the master iron regulator — is elevated for 3–6 hours post-exercise, blocking intestinal iron absorption. Knowing this changes supplementation timing completely.

5 min read · 2026-09-08

Athletes Have Been Using Glycaemic Index Wrong for 40 Years

GI was developed for diabetes management, not sport. Here's how glycaemic load reframes carbohydrate strategy for performance athletes — and when GI actually matters.

5 min read · 2026-09-01

Elite Endurance Athletes Have a Measurably Different Gut. Here's What's in It — and Why It Matters.

Elite marathon runners carry significantly higher concentrations of Veillonella atypica — a bacterium that converts exercise-produced lactate into propionate, an additional fuel source. The gut microbiome is now a measurable performance variable.

5 min read · 2026-09-01

The Most Underused Component of Endurance Race Preparation Is Not a Training Session. It Is Practising Your Nutrition Protocol in Training — and Most Athletes Never Do It.

GI distress causes 30–50% of DNFs in ultramarathon events and is the most common non-musculoskeletal reason for performance decline in long-course triathlon. The gut is trainable — and training it requires deliberate practice with race-day nutrition protocols during training.

5 min read · 2026-09-01

Heat Stress and Gut Permeability: What Happens Above 39°C

Exercise heat stress disrupts intestinal tight junctions, triggering LPS endotoxaemia that drives systemic inflammation and exertional heat stroke risk. Learn the I-FABP marker, splanchnic vasoconstriction mechanism, and evidence-based gut protection strategies.

5 min read · 2026-09-01

Exogenous Ketones: What the Evidence Actually Shows for Athletic Performance

Ketone esters and salts are marketed as a fourth fuel source for athletes. The evidence is mixed, nuanced, and training-status dependent. Here is what Cox, Holdsworth and Dearlove actually found.

5 min read · 2026-08-25

Fasted Cardio Burns More Fat During the Session. It Does Not Burn More Fat Overall.

Fasted cardio increases fat oxidation during the session but produces no additional fat loss over 24 hours. Here is what the evidence says about substrate use and body composition.

5 min read · 2026-08-25

Glutamine and Immunity: The Amino Acid Endurance Athletes Deplete

Glutamine drops 20–30% after prolonged exercise, suppressing lymphocyte activity and URTI resistance. Here's the science and how dietary protein protects immunity.

5 min read · 2026-08-25

Dehydration and Strength: 2% Body Weight Loss Costs Up to 8%

Dehydration of 1.5–2% body weight reduces muscular strength by 4–8% and endurance capacity by more. Here is the neuromuscular physiology and hydration protocol.

5 min read · 2026-08-11

DHA in Pregnancy: Why 200mg Is the Floor for Foetal Brain Development

Helland 2003 found +4 IQ points from maternal DHA supplementation. The foetal brain accumulates 30g of DHA in Q3. Most prenatal supplements are underdosed. Here's the evidence.

5 min read · 2026-08-11

The Dietary Inflammatory Index: Is Your Diet Fuelling Recovery or Systemic Inflammation?

The Dietary Inflammatory Index scores your diet on a -9 to +8 scale. Athletes with high-DII diets show elevated hs-CRP, impaired recovery, and blunted adaptation. Here is how to fix it.

5 min read · 2026-08-11

Dietary Nitrate and Beetroot Juice: The Nitric Oxide Performance Evidence

Dietary nitrate from beetroot reduces the oxygen cost of exercise by 3–5% and improves time-to-exhaustion by up to 16–22%. The mechanism is bacterial conversion of nitrate to nitrite to nitric oxide in the oral cavity — which means mouthwash before competition eliminates the entire benefit.

5 min read · 2026-08-11

You Might Be Eating Enough Protein — But Not Absorbing Enough. Digestive Enzymes Explain the Gap.

Protease supplementation, HCl production, and brush border enzyme activity determine how much dietary protein actually reaches muscle tissue. Here's the science athletes often miss.

5 min read · 2026-08-11

Cyclical Keto for Hybrid Athletes: Getting Fat Adaptation Without Sacrificing High-Intensity Power

The cyclical ketogenic diet uses periodic carbohydrate refeeds to restore glycogen for high-intensity training while preserving fat-adaptation benefits. Here's the evidence and the protocol.

5 min read · 2026-08-04

Copper, Ceruloplasmin and Iron: Why Supplements Do Not Raise Ferritin

Copper deficiency silently impairs iron metabolism. Without adequate ceruloplasmin, iron cannot leave storage or be incorporated into haemoglobin — regardless of how much you supplement.

5 min read · 2026-07-28

Chrono-Nutrition: Why Your Circadian Clock Cares When You Eat

Same calories, same macros, different timing — and the outcomes diverge. Chrono-nutrition explains why your circadian clock controls metabolic efficiency.

5 min read · 2026-07-21

Coeliac Disease in Athletes: The Silent Deficiency That's Wrecking Performance

Coeliac disease causes villous atrophy that blocks iron, B12, folate, and calcium absorption. Many athletes are undiagnosed for years. Here's the nutritional science and performance impact.

5 min read · 2026-07-21

Collagen DIAAS Is Zero: Why Athletes Should Still Take It

Collagen contains no leucine and cannot stimulate muscle MPS. Yet it significantly boosts tendon collagen synthesis via a separate pathway. Here's the science behind the dual-supplement strategy.

5 min read · 2026-07-21

Collagen for Joint Health: Dosing, Timing and the Evidence Base

Collagen supplements are often dismissed as wellness marketing. But the specific protocol with evidence — gelatin + vitamin C, taken 60 minutes before exercise — is mechanistically distinct from general collagen powder use.

4 min read · 2026-07-21

Caffeine Washout Before a Race: The Sensitivity Reset Protocol

Regular caffeine users blunt their own ergogenic advantage. A structured pre-competition washout protocol restores adenosine receptor sensitivity — maximising race-day caffeine effect.

5 min read · 2026-07-14

Carb Cycling: Training-Day vs Rest-Day Nutrition for Athletes

Carbohydrate cycling — varying carbohydrate intake based on daily training demand — optimises muscle glycogen on high-output days while improving fat oxidation on low-output days. The mechanism is GLUT4 translocation and post-exercise insulin sensitivity.

5 min read · 2026-07-14

Carbohydrate Loading Is Not Just 'Eating More Pasta'. The Protocol That Actually Maximises Race-Day Glycogen.

Muscle glycogen capacity is approximately 400–600g in trained athletes — but most reach race day at 60–70% of that ceiling. The modified carbohydrate loading protocol from Bergström 1967 onwards can push glycogen stores to true ceiling in 36–48 hours.

5 min read · 2026-07-14

CGM for Athletes: What Postprandial Glucose Actually Tells You

Elite athletes are using CGM devices to reveal wildly different glucose responses to the same foods. The science of postprandial glucose variability and what it means for fuelling.

5 min read · 2026-07-14

Chews vs Gels vs Liquid Carbohydrate: Which Fuelling Format Wins on Race Day?

Energy chews, gels, and carbohydrate drinks all supply race fuel — but their gastric emptying rates, palatability profiles, and practical applications differ significantly. Here's the science.

5 min read · 2026-07-14

Plant-Based Athletes Optimising Omega-3 Through Chia Are Getting a Worse Deal Than They Think

The FADS2 enzyme bottleneck means ALA from chia and flaxseed converts poorly to EPA and DHA. Here's what plant-based athletes actually need for omega-3 sufficiency.

5 min read · 2026-07-14

Exercise and Nutrition in Chronic Disease: Why Context Decides Outcome

Prescribing exercise to people with metabolic syndrome or type 2 diabetes without addressing the nutritional environment is like prescribing a drug without the correct dosing protocol.

5 min read · 2026-07-14

Bovine Colostrum and Athlete Immunity: What the Evidence Shows

Bovine colostrum contains growth factors, immunoglobulins and lactoferrin. Here's what the clinical evidence says about its effects on athlete immunity and performance.

5 min read · 2026-07-07

Is Caffeine a Diuretic? The Hydration Myth, Tested

Armstrong 2002 and Killer 2014 both confirmed coffee hydrates as well as water. The caffeine diuretic myth persists in sport — here's what the evidence actually shows.

5 min read · 2026-07-07

Caffeine Accumulation: The Maths of Four Coffees in One Day

Each cup of coffee doesn't clear before the next one arrives. Caffeine accumulates across doses via half-life stacking. Here's the pharmacokinetics — and why it matters for sleep and performance.

5 min read · 2026-07-07

Caffeine and Strength: The Neural Priming Effect Beyond Alertness

Caffeine raises motor cortex excitability and calcium sensitivity to deliver a 2–6% acute strength boost. Discover the neural mechanism and optimal dosing strategy.

5 min read · 2026-07-07

BCAA vs EAA: Why Branched-Chain Aminos Alone Cost You Muscle

BCAAs trigger a partial MPS signal. EAAs complete it. Here's what the science says about why branched-chain amino acids alone are not enough — and what to use instead.

5 min read · 2026-06-30

Berberine for Athletes: AMPK, Glucose Control and the Metformin Comparison

Berberine activates AMPK and improves insulin sensitivity with clinical evidence rivalling metformin. Here's how it applies to body composition and athletic performance.

5 min read · 2026-06-30

Beta-Alanine and Carnosine: The Buffer That Delays High-Intensity Failure

Intramuscular acidosis — the accumulation of H⁺ ions during anaerobic glycolysis — is a primary limiter in efforts lasting 1–10 minutes. Beta-alanine supplementation increases muscle carnosine, the principal intracellular buffer. Here is the mechanism and protocol.

5 min read · 2026-06-30

BMR Prediction Equations: Why They Are Wrong for 20% of People

Every TDEE calculator uses a prediction equation for basal metabolic rate. Every prediction equation has a population-level error of ±10–15%. For an athlete consuming 3,500 kcal/day, that's a potential daily error of 350–525 kcal — the equivalent of a full meal disappearing from the calculation.

5 min read · 2026-06-30

Alcohol and Women Athletes: Why the Same Drink Means 30% Higher BAC

Female athletes reach 30–40% higher BAC from identical alcohol intake due to gastric ADH differences, lower total body water, and hormonal enzyme interactions. Here's the evidence.

5 min read · 2026-06-23

Vitamin C and Collagen Synthesis: Why Antioxidant Timing Matters

Vitamin C is an essential cofactor for collagen synthesis — but timing and dose determine whether it helps or hinders. Learn the Shaw protocol, prolyl hydroxylase mechanism, the ROS double-edged sword, and the evidence for pre-exercise vitamin C + gelatin.

5 min read · 2026-06-23

Ashwagandha (KSM-66) and Cortisol: The RCT Evidence in Athletes

KSM-66 ashwagandha is one of very few adaptogens with proper randomised controlled trial data in athletes. Here is what the cortisol, strength and VO2max research actually shows.

5 min read · 2026-06-23

The Autoimmune Protocol (AIP) Diet: What Athletes With Inflammatory Conditions Need to Know

The Autoimmune Protocol (AIP) eliminates immune-triggering foods to calm systemic inflammation. Learn how athletes use it, what the science shows, and when it works.

5 min read · 2026-06-16

Alcohol and Tendon Repair: How Two Drinks Sabotage Connective Tissue

Alcohol impairs collagen synthesis at doses most athletes consider moderate. The biochemistry of ethanol's effect on prolyl hydroxylase, fibroblast activity, and tendon repair windows.

5 min read · 2026-06-16

Creatine Supplementation: The Complete Evidence Review

Creatine monohydrate is the most studied supplement in sports science. This is the full evidence base: loading protocols, the 20–30% vegetarian deficit, brain phosphocreatine, sarcopenia in over-55s, female-specific dosing, and why every "improved" formulation has failed head-to-head.

16 min read · 2026-04-06

Caffeine Half-Life: Exactly How Long Caffeine Stays in Your System

8 min read · 2026-04-03