Gabrielle Lyon (physician (do)) and Layne Norton (nutrition scientist, powerlifter) side by side: how they train, eat, supplement and sleep, how strong the evidence is, and how to build a plan from either or both.
Training splits are our estimates from each expert’s published routine. Following checked October 2026.
The key differences
Their training weeks are similar: no part of the split differs by more than 5 percentage points.
In plans in their style, both use 1-minute intervals for hard sessions.
We rate the overall evidence behind both protocols as strong.
Supplements that go into a plan: Lyon, creatine monohydrate; Norton, creatine monohydrate, whey protein, caffeine before training. Prescription items and personal stacks stay out of every plan.
Only Lyon has a mobility or movement routine of their own.
Protocols side by side
Each line is rated for the evidence behind it. “Doctor only” items never go into a plan.
Training
Gabrielle Lyon
Resistance training 3–4 days a week, done with focusStrong evidence
1–2 days a week of short, higher-intensity intervalsSome evidence
Steady aerobic work, such as a 30-minute session or a brisk walkStrong evidence
Move after meals: a walk, some air squats or a short bodyweight circuitSome evidence
For older adults who do nothing yet, any regular resistance training is the priorityStrong evidence
Layne Norton
Lift weights consistently, year after year, and take sets close to failureSome evidence
Exercise improves health markers even when it does not change your weightStrong evidence
Track daily steps while dieting: everyday movement tends to drop as calories fallSome evidence
His PHAT programme: 5 days a week, two heavy 'power' days plus three higher-rep hypertrophy daysPersonal habit
Eating
Gabrielle Lyon
About 2.2 g per kg of ideal body weight a day (she also gives 1.2–1.6 g per kg, sometimes up to 1.8 g per kg)Some evidence
30–50 g of high-quality protein at the first meal, and a similar large dose at the last mealSome evidence
About 2.5 g of leucine (roughly 30 g of quality protein) per meal, and about 9 g of leucine across the daySome evidence
People eating mainly plants may need more total protein, around 1.6 g per kg, because plant protein is lower quality per gramSome evidence
For inactive people, about 130 g of carbohydrate a day, roughly 40–50 g per meal, with more after exercisePersonal habit
Older adults should avoid long fasts, which can speed muscle lossSome evidence
Layne Norton
Track calories and protein; food labels can be ~20% off, but consistent tracking still shows your true intake over timeSome evidence
Weigh yourself each morning and compare weekly averages, not single daysSome evidence
Protein about 1.6 g/kg a day; up to ~2.2 g/kg when dieting or very leanStrong evidence
Choose a diet style you can sustain; low-carb and low-fat work equally well with calories and protein matchedStrong evidence
Fibre about 15 g per 1,000 kcalSome evidence
Seed oils are fine: replacing saturated fat with polyunsaturated fat lowers LDL and heart riskSome evidence
Supplements
Gabrielle Lyon
Creatine supports muscle; she mentions possible brain benefits at higher dosesSome evidence
Prefer complete protein foods over leucine alone; amino acid supplements make most sense when a meal is low in proteinNote
She regards the official leucine allowance (about 2.7 g a day) as too low because it was based on young menNote
Layne Norton
Tier 1 – creatine monohydrate 3–5 g a day; loading is optional; timing does not matterStrong evidence
Tier 1 – whey protein 20–40 g per serving (about 2–3 g leucine) to help reach daily proteinStrong evidence
Tier 1 – caffeine 3–6 mg/kg about 45–60 min before training; lower doses still help alertnessStrong evidence
Sleep & recovery
Gabrielle Lyon
No specific guidance in what we reviewed.
Layne Norton
Avoid caffeine late in the day; it can harm sleep even if you fall asleep normallyStrong evidence
Carb timing matters little on average; if carb-heavy meals make you sleepy, move themNote
Poor sleep and unmanaged stress are bigger problems than small nutrition detailsNote
Weak spots to know
Gabrielle Lyon
Her daily target of about 2.2 g per kg of ideal body weight is well above the official allowance of 0.8 g per kg and the 1.0–1.2 g per kg that an expert group recommends for over-65s; whether intakes that high add further benefit for most older adults is still debated.
The 'leucine threshold' idea behind her per-meal targets and her food rankings is contested; critics such as Simon Hill argue that total protein matters more and that well-chosen plant proteins can meet needs.
Some of the foundational research she draws on, such as Layman's 2005 study, was partly funded by beef and food industry groups.
Layne Norton
Commercial ties: he co-founded Outwork Nutrition, which sells whey protein and products containing creatine — overlapping with his Tier 1 list — and co-founded the paid Carbon Diet Coach app and the BioLayne coaching business. He has also disclosed past research funding from the National Dairy Council, the National Cattlemen's Beef Association and the Egg Board.
Reverse dieting, which he helped develop and popularise, had no published controlled trials supporting it as of 2021; its use rests mainly on coaching experience.
His relaxed view of seed oils is contested by others in the health space. On The Drive (2026), Peter Attia presented the strongest case against seed oils for a debate after the booked guest declined, while saying his own view is close to Norton's; debate continues over older trials and LDL oxidation.
Build a plan from Lyon, Norton or both
Your free plan shows a week of gym sessions, cardio, a day of eating, supplements and mobility, fitted to your age, time and health.
What is the main difference between Gabrielle Lyon and Layne Norton?
Their training split differs most in strength: Lyon about 60%, Norton about 65% (our estimate from their published routines). Lyon's signature habit is 30–50 g protein a meal; Norton's is Tiered supplements.
How much protein do Lyon and Norton recommend?
Lyon: ~2.2 g per kg ideal weight. Norton: 1.6–2.2 g/kg.
Whose advice has stronger evidence?
We rate the overall evidence behind both protocols as strong.
Do Lyon and Norton disagree?
Not directly in what we reviewed. Their differences are in emphasis: their training weeks are similar: no part of the split differs by more than 5 percentage points.
Can I combine Lyon and Norton?
Yes. In Build my mix you choose one expert per area, for example one for strength and another for eating. Your free plan shows the result straight away.