Reduce Visceral Fat
Dr. Sean O'Mara's approach to the dangerous fat around your organs: cut the ultra-processed food that drives it, sprint and lift, walk daily, and protect sleep. The levers are well evidenced, even where the diet specifics are debated.
Remove ultra-processed food, refined carbs and seed oils Eliminate ultra-processed products, sugary drinks, refined flour and industrial seed oils for 30 days, then reassess
These drive the insulin and inflammatory signalling that favours visceral fat storage.
Eat whole foods with fermented foods daily O'Mara favours a meat-forward, whole-food base; add 1 to 2 tablespoons of fermented foods (kimchi, sauerkraut, kefir) per meal. You do not need full carnivore (see cautions)
Whole foods steady insulin; fermented foods support the gut, which influences inflammation.
Do short, all-out sprints ~2 to 3 sessions/week of 20 to 30 second near-maximal efforts with full recovery; build up gradually and get cleared first
Interval and vigorous training rank highest for visceral fat reduction in the trial evidence.
Resistance train 2 to 3 sessions/week of progressive resistance training
Muscle acts as a glucose sink, pulling blood sugar away from visceral storage.
Get 8,000+ steps, especially after meals Aim for 8,000 or more steps daily; a 10 to 20 minute walk after meals is especially useful
Low-intensity movement keeps insulin low and helps draw on stored fat.
Prioritise good sleep Consistent timing and 7 to 8 hours; poor sleep raises stress hormones that favour belly and visceral fat
Sleep loss shifts hormones toward fat storage and cravings.
Use a modest eating window Start around 14:10 (eat within a 10-hour window) and adjust to what is sustainable; do not force long fasts
A consistent eating window can support insulin sensitivity and overall intake control.
Visceral fat is metabolically active and inflammatory, and it shrinks with improved insulin sensitivity, fitness and sleep.
View sources
Ep 827: Dr. Sean O'Mara on Visceral Fat. Why Your Abs Don't Matter. (Power Athlete Radio)
Dr. Sean O'Mara's MRI-based visceral fat method: food, ferments, sprints, sleep (overview)
Effects of various exercise types on visceral adipose tissue: network meta-analysis of 84 RCTs (Obesity Reviews, 2024)
Effects of different exercise types on visceral fat: systematic review & meta-analysis (HIIT most effective)
Not medical advice. This page is for education only and is not a substitute for professional medical care. Consult a qualified clinician before changing your health routine.
Independent curation. YourProtocol is an independent platform. This protocol is based on the publicly available work of Sean O'Mara and is not created, reviewed, endorsed by, or affiliated with Sean O'Mara or Visceral Fat Researcher (MRI-based).
Is this for you
- Anyone with a high waist circumference
- People with metabolic or insulin-resistance concerns
- Those who want the evidence-backed levers, not hype
- Anyone targeting the fat around the organs
Cautions
- Do not stop or change prescribed medication (statins, blood-pressure drugs, or atrial-fibrillation medication) based on this or any online protocol. Atrial fibrillation is a serious condition; viral claims of 'reversing it with food alone' are not a basis to change treatment, work with your doctor
- Widely shared dramatic results (for example, large visceral-fat loss in 30 days, or a public figure's claimed reversal) are unverified; treat them as anecdotes, not evidence. Individual results vary a great deal
- The meat-heavy or carnivore framing is O'Mara's approach, not a requirement, and animal-heavy diets raise LDL cholesterol and apoB in many people; the evidence-backed core is cutting ultra-processed food, adding fermented foods and fibre, training, walking and sleep
- Sprinting and high-intensity training are strenuous: build up gradually and get medical clearance first, especially if you are older or have heart risk factors
- If food rules or fasting start to feel rigid or anxious, ease off and seek support; this is about health, not restriction
- The core of this protocol is free. Educational only, not medical advice
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