A short, honest guide to ketogenic eating — without the green-juice
clichés, the bro-science, or the lectures. Read it in ten minutes,
then decide for yourself.
The ketogenic diet is a high-fat, moderate-protein, very-low-carb way
of eating. By keeping carbohydrates under roughly 20–30 grams of net
carbs per day, your body shifts from burning sugar to burning fat —
a metabolic state called ketosis. People do keto for steady
energy, fewer cravings, body recomposition, and, originally, for
managing epilepsy. The principle is older than nutrition science as
we know it.
Ketoly tracks macros, plans your week, and learns your taste.
Macros at a glance
Three numbers that move the needle.
The "ratio" you'll hear about — 70 / 25 / 5 or 75 / 20 / 5 —
describes the share of calories, not grams. In grams, it
comes out roughly like this for a 2,000-calorie day.
~70%
Fat
≈ 155 g/day
Olive oil, butter, avocado, fatty fish, nuts, full-fat dairy,
eggs. The bulk of your plate is dressed in something rich.
~25%
Protein
≈ 125 g/day
Meat, fish, eggs, cheese. Enough to keep muscle, not so much that
excess protein converts to glucose in the background.
~5%
Net carbs
≈ 20–30 g/day
From leafy greens, low-sugar vegetables, berries in small
portions. This is the budget — protect it.
What to eat
A keto food list, decided.
Eat
Freely
Eggs — whole, in any form
Meat & poultry — beef, lamb, chicken, pork
Fish & seafood — salmon, sardines, prawns, mackerel
Low-fat dairy — usually sweetened or thickened with starch
Most packaged "low-fat" food — sugar is the substitute
Refined seed oils, where you can help it
A practical rule: if it grows above ground and didn't come in a
wrapper, it's probably fine. If a label lists more than five
ingredients and one of them ends in -ose, it's probably not.
Keto, globally
Keto isn't bacon and lettuce.
The American keto stereotype — cheese, bacon, butter, repeat —
is one (perfectly fine) tradition. It's not the only one. Whole
cuisines are quietly low-carb already, or sit one ingredient swap
away from being keto.
Mediterranean
Olive oil, fish, lamb, greens, herbs, yogurt. Swap the bread basket for more salad and you're already there.
Indian
Paneer, ghee, tandoor meats, leafy curries. Skip rice and naan; the gravies are the point anyway.
Thai
Coconut milk curries, grilled meats, herbs. Hold the rice and most noodle dishes — laab and panang are friendly.
Italian
Antipasti, bistecca, hard cheeses, olive oil, slow-cooked greens. The pasta is one course of many.
Kebabs, mezze, yogurt sauces, grilled aubergine. Skip the pide; the rest of the table is keto already.
Ketoly's recipe library leans into this — twelve cuisines, every dish
macro-checked, written like a magazine column instead of a fitness
instruction.
Net carbs
The number that actually matters.
Total carbs on a nutrition label include fiber. Fiber doesn't raise
blood sugar, so we subtract it. Sugar alcohols (erythritol, allulose,
xylitol) mostly don't raise it either, so we subtract those too. The
leftover number — the one that actually breaks ketosis — is your
net carbs.
Total carbs−Fiber−Sugar alcohols=Net carbs
Most keto plans cap net carbs at 20 grams per day for the first few
weeks, then loosen to 30–50 g once you're metabolically settled. Some
people stay strict; some swing higher on training days. The number is
a budget, not a verdict.
This is also where tracking earns its keep. Doing the subtraction in
your head for every meal is a chore — apps exist for a reason.
Ketoly does the math automatically, including the sugar-alcohol step
most trackers skip, and surfaces a running net-carb total for the
day. You don't need to log fanatically; you do need to know roughly
where you stand.
The science, briefly
What ketosis actually is.
Your body has two main fuel sources: glucose (from carbs) and fat.
When carbs are abundant, glucose is the default — easy to use, easy
to store. Strip carbs out for a few days and the liver starts
converting fat into ketone bodies: small molecules that
cross into the brain and power most of the tissues that would
normally run on sugar. That fuel-switch is ketosis.
Most people feel it within three to five days. Hunger flattens out.
Energy stops spiking and crashing. The afternoon dip fades. Some
people report sharper focus; the research on cognition is
promising but still settling.
The first week can be rough. It's nicknamed the "keto flu" —
headache, low energy, fog, sometimes muscle cramps. It's not really
flu; it's a shift in how your kidneys handle salt and water. Drink
more, salt your food, and supplement magnesium and potassium if you
feel it. It almost always passes within a week.
Ketosis itself is well-studied. It's how every human's body responds
to fasting, low food availability, or — in the original 1920s
clinical use — a deliberately designed eating pattern. It is not a
crash diet, a juice cleanse, or a metabolic hack. It's an old idea
with a careful modern version.
Common questions
What people ask, before they start.
Is the keto diet safe?+
For most healthy adults, yes. Keto has been studied for nearly a century — originally as a medical tool for epilepsy — and a well-formulated version is widely considered safe. That said, if you're pregnant, breastfeeding, on diabetes medication, or have a history of kidney or liver disease, talk to your doctor before starting.
How long does it take to get into ketosis?+
Typically two to four days of staying under ~20 g of net carbs. The exact window depends on your activity level, glycogen stores, and metabolic flexibility. Adding light cardio or a short fast can shorten it.
What is the keto flu, and how do I avoid it?+
A cluster of symptoms — headache, low energy, brain fog — that some people feel during the first week as the body switches fuels. It's mostly an electrolyte shift. Drinking more water and salting your food generously almost always resolves it. Magnesium and potassium help too.
Can I drink alcohol on keto?+
Dry wines, clear spirits (vodka, gin, tequila), and dry champagne are essentially zero-carb. Beer, sweet cocktails, and most ciders are not. One caveat: alcohol tolerance drops sharply on keto — pace yourself.
Can I eat fruit on keto?+
Most fruit is too high in sugar, but berries are friendly in small portions — raspberries, blackberries, strawberries. Half an avocado (technically a fruit) is a near-perfect keto food.
Do I need to count calories?+
Not strictly. Keto is naturally satiating, and most people eat less without trying. If your goal is fat loss and the scale stalls for two or three weeks, then it's worth checking portions. Ketoly tracks both macros and calories so you can ignore the second one until you need it.
What about cheat days?+
One high-carb meal will knock you out of ketosis for a day or two. It's not a moral failure — but it's also not free. Most people feel better treating keto as a steady habit rather than a five-on, two-off cycle.
How is keto different from low-carb or Atkins?+
Atkins is a phased low-carb diet that lets carbs climb back up over time. Standard low-carb is anything under ~100 g of carbs per day. Keto is stricter — typically under 20–30 g of net carbs — and aims for sustained ketosis as the primary fuel state.
Putting it together
A day of keto, with Ketoly.
One example — about 1,900 calories, well under the 20 g net-carb
budget. Swap pieces for what's in your fridge; the macros will hold.
Morning
Soft-scrambled eggs with avocado.
Three eggs in butter, half an avocado, a corner of feta, black
pepper. Coffee with cream, no sugar.
3g net carbs42g fat26g protein
Midday
Mediterranean chicken over greens.
Olive-oil-poached chicken thigh, olives, tomato, cucumber,
crumbled feta, a generous pour of olive oil and lemon.
6g net carbs48g fat38g protein
Afternoon
A handful of almonds, a square of dark chocolate.
85 % dark, twenty grams. Not for the macros — for the day.
4g net carbs18g fat6g protein
Evening
Ribeye with garlic butter and broccoli.
8 oz ribeye, finished in butter and garlic. Charred broccoli on
the side with chili flakes. A glass of dry red, if you like.
5g net carbs62g fat54g protein
Day total
18g net carbs·170g fat·124g protein·≈ 1,900 kcal
Start
Ready when you are.
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you can spend the calories on dinner instead of arithmetic.
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