Epilepsy in teens and adults, migraine, adherence
Modified Ketogenic Diet
The Modified Atkins approach — clinical-grade carb restriction without weighing every gram.
- Core restriction
- 10-20 g net carb/day, fat encouraged, protein and calories unlimited
- Difficulty
- ●●●●●
- Check a food
- Open the food checker
A gentle reminder. This guide is for learning, not a prescription. Therapeutic diets interact with medication and conditions, so it's worth talking to your doctor or a registered dietitian before you begin.
A tidy few pages with the food lists, meal plan and reminders — good for the fridge door or the first appointment with your dietitian.
How it works
The Modified Atkins Diet (MAD) and the Modified Ketogenic Diet were designed at Johns Hopkins to solve one problem: classic 4:1 keto works, but almost no adolescent or adult sticks with weighed meals for years.
Instead of a fixed ratio, carbohydrate is capped hard — usually 10 g/day to start, moving to 15-20 g — while fat is actively encouraged and protein and calories are left free. Ketone levels land slightly lower than classic keto but high enough for a seizure response in a large share of patients.
Because nothing is weighed, meals can be assembled from ordinary food, which is why the drop-out rate is dramatically lower than the classic protocol.
Nutrition at a glance
The Modified Atkins pattern keeps the carbohydrate ceiling but drops the weighing, so numbers are limits rather than targets.
- Net carbohydrate
- 10-20 g/day
- Adults usually start at 20 g, children at 10 g
- Fat
- Encouraged, not weighed
- Roughly a 1:1 to 2:1 fat ratio in practice
- Protein
- Unrestricted
- The main difference from classic keto
- Calories
- Not counted
- Appetite usually does the work
- Fluid and salt
- 2-3 L, 3-5 g sodium
- Same losses as classic keto
Nutrients that often run short
- Calcium
- Vitamin D
- Magnesium
- Potassium
- Fibre
- B vitamins
These are the ones worth planning for — through food where you can, and through a supplement your clinician suggests where you can't.
Key cautions
None of this is meant to frighten you off. These are simply the things that most often catch people out on this diet — the ones worth raising at your next appointment.
- Talk to a clinician
Medication review comes first
As with classic keto, glucose-lowering drugs and blood pressure medication often need reducing before you start.
- Worth testing
Multivitamin is standard, not optional
Epilepsy clinics prescribe a multivitamin plus calcium and vitamin D from day one because the food list cannot cover them.
- Keep an eye on
Carb creep is the usual failure
Without weighing, portions drift. If seizures or symptoms return after a good spell, re-count for a week before changing anything else.
- Keep an eye on
Constipation is near-universal
Plan fibre, fluid and magnesium in from the start rather than treating it later.
Used for
- Drug-resistant epilepsy in adolescents and adults
- Children who cannot tolerate or maintain classic ketogenic ratios
- Chronic migraine prophylaxis, where evidence is growing
- Some mitochondrial and metabolic conditions, alongside specialist care
- Bipolar disorder and treatment-resistant depression are under active trial, not yet standard care
What to eat
Eat freely
Fat first
- Butter
- Olive and avocado oil
- Heavy cream
- Mayonnaise
- Coconut oil
- MCT oil in ramped doses
Protein
- Eggs
- All meat and poultry
- Fish and shellfish
- Cheese
Vegetables
- Leafy greens
- Broccoli
- Cauliflower
- Green beans
- Peppers in small amounts
- Cucumber
- Celery
Eat with care
Count these against your 15 g
- Nuts and nut butters — count every gram
- Berries, a few at a time
- Tomato and onion in cooking
- Cream, which carries ~1 g carb per 2 tbsp
- Carb-free medication vehicles — many syrups and chewables carry sugar
Best to skip
Everything starchy
- Bread
- Rice
- Pasta
- Potato
- Corn
- Cereal
- Crackers
Sugar in all forms
- Sweets
- Juice
- Soda
- Sweetened yoghurt
- Sports drinks
- Honey and syrups
Fruit beyond berries
- Banana
- Apple
- Orange
- Grapes
- Dried fruit
Three days of meals
Day 1
- Breakfast
- Two eggs fried in butter with cheddar, one slice of bacon.
- Lunch
- Chicken caesar without croutons, extra dressing.
- Dinner
- Burger patty topped with butter, green beans almondine.
- Snack
- Pork rinds with cream cheese dip.
Day 2
- Breakfast
- MCT oil in coffee plus a two-egg omelette with feta and spinach.
- Lunch
- Deli turkey rolled with avocado and mayonnaise, cucumber spears.
- Dinner
- Pan-seared cod in brown butter, roasted cauliflower.
- Snack
- Half an avocado with salt and olive oil.
Day 3
- Breakfast
- Full-fat cottage cheese with a tablespoon of flax and cinnamon.
- Lunch
- Egg salad in lettuce cups with olives.
- Dinner
- Sausages with buttered cabbage and mustard.
- Snack
- Cheese crisps.
Getting started
- 1
Agree the carb target with your neurologist or epilepsy dietitian — 10 g for the first month is the usual clinical start.
- 2
Audit every medication and supplement for carbohydrate. Liquid formulations are the classic hidden source in seizure patients.
- 3
Keep a seizure diary from day one; the point of the diet is a measurable change, not a number on a scale.
- 4
Supplement a multivitamin, calcium, vitamin D and often carnitine — this is standard in clinical programmes.
- 5
Plan for the three-month review. If there is no response by then, most clinics reassess rather than push on indefinitely.
Common mistakes
- Treating it as 'keto but casual' and letting carbs drift to 40 g, which is below the therapeutic threshold for most people.
- Not raising fat when protein goes up — ketone levels quietly fall.
- Starting MCT oil at full dose and getting cramping and diarrhoea. Ramp it over two weeks.
- Stopping antiseizure medication independently. Dose changes belong with the prescriber.
- Ignoring constipation until it becomes a problem; low fibre plus low volume needs proactive management.
FAQs
How is this different from classic keto?
Classic keto weighs every meal to a fat-to-everything-else ratio. Modified keto caps carbohydrate only, and lets protein and calories run free. Similar seizure outcomes in adolescents and adults, far better adherence.
Does it work as well?
In adolescents and adults, studies show comparable seizure reduction rates. In infants and young children, the classic ratio diet is still generally preferred.
Can I use it just for migraine?
There is promising evidence but no consensus protocol. Many people trial three months at 20 g net carb and track headache days before deciding.
Stacking with other diets
- Easiest keto variant to combine with gluten-free, since it is already grain free.
- Combines cleanly with low FODMAP: both restrict fermentable carbohydrate, and the fat-forward emphasis is unaffected.
- If combining with low oxalate, avoid the almond-flour baking that most modified keto recipes lean on.