Avocado: classified as fruit, behaves as fat

Almost every fruit gets 85 to 95 percent of its energy from carbohydrate. Avocado gets around 73 percent from fat.

That single difference explains why it belongs in the fats section of this site rather than alongside bananas, and why it catches people who count it as a fruit.

The numbers

Per 100 grams: around 167 calories, 15.4 grams of fat, 8.6 grams of carbohydrate, 2 grams of protein, and 6.8 grams of fibre.

That bottom row is where the problem starts. The serving printed on the packet is a third of a fruit, which nobody eats.

A fighter who has half an avocado is making a moderate addition to a meal. A fighter who has a whole one has added most of a protein feed's worth of calories, and it did not feel like a decision.

The fat is the point

Around 64 percent of avocado fat is monounsaturated, principally oleic acid, which is the same dominant fat in olive oil. The unsaturated to saturated ratio sits at roughly six to one.

For a fighter that means avocado is a fat source. Not a vegetable, not a light addition, not a garnish.

Same category as oil, nuts and nut butter, and it should be counted in the same place.

And the part that is actually useful

Fat-soluble compounds need fat present to be absorbed, and most vegetables carry almost none.

The same principle applies to olive oil in a dressing, and it is one of the better arguments against eating salad undressed for the sake of calories: you save the calories and lose part of what you were eating the salad for.

The fibre, and the fight week answer

Ten grams of fibre in a whole avocado is a substantial amount, comparable to a large serving of vegetables.

Which puts avocado firmly on the remove side of the low residue list, and it removes it for the same two reasons as nuts: fibre becomes gut content, and fat slows gastric emptying.

There is no version that works in the final days. Guacamole is avocado. Blended is avocado.

Out at the start of the low-residue phase, back the day after the fight.

Potassium, and the same correction as bananas

Avocado carries roughly 485 to 507 milligrams of potassium per 100 grams, more than a banana provides and with far less sugar.

That fact gets quoted constantly, usually alongside a suggestion about cramp, and the correction is the same one made under bananas.

The evidence that dietary potassium prevents exercise cramp in a well-fed athlete is thin, and potassium is specifically one of the electrolytes where no difference was found between athletes who cramp and athletes who do not.

Eat avocado for the fat, the fibre and the absorption effect. The potassium is a bonus rather than a reason, and anybody selling it as a cramp solution is repeating an old error with a newer fruit.

Satiety, which is the camp argument

Fat and fibre together are a strong satiety combination, and avocado is one of the few foods delivering both in the same package.

In a crossover trial, adding whole avocado to a breakfast meal enhanced hunger suppression compared with a low-fat control meal of similar energy, and participants reported feeling more satisfied.

For a fighter in a sustained deficit, where the practical enemy is hunger rather than any nutrient, that matters.

Half an avocado in a meal buys satiety that the same calories from a carbohydrate would not.

The trade is the calorie cost, and it is the same trade as with every food in this section: fat is satisfying and fat is dense, and which of those dominates depends on the week.

How to use it without losing the plot

Three patterns, because avocado is one of the easier foods to use badly.

• Half a fruit in a meal that already contains vegetables. This is where the absorption effect applies and where the portion stays sensible.
• Mashed onto toast is the version everybody knows and where portions drift. A whole avocado on two slices of bread is around 400 calories before anything else, and it registers as a light breakfast. Half is the version that works.
• In a blended drink it disappears entirely, adding creaminess without flavour, which is useful when appetite has gone in the last weeks and calories need to arrive somehow. The one situation where a whole avocado is deliberate rather than accidental.

The pattern to avoid is avocado as a snack on its own. The calories are the same and the absorption benefit is wasted, because there is nothing alongside it to absorb from.

Ripeness, and the practical problem

Avocado is the only food on this site with a serious availability problem that has nothing to do with supply.

They are sold unripe, they ripen unpredictably, and the window between ready and spoiled is around 2 days. A fighter who buys four on Sunday will find two unusable by Thursday.

Two things help. Buying at staggered ripeness gives a week of usable fruit rather than one good day.

And an unripe avocado ripens faster in a paper bag with a banana or apple, which release ethylene.

Once cut, the flesh browns quickly through oxidation. Lemon or lime juice slows it. Keeping the stone in the unused half works less well than folklore suggests.

Refrigerating a ripe avocado slows further ripening and buys a few days. Refrigerating an unripe one stops it ripening properly at all.

What it is not

Avocado has picked up a set of claims that do not survive examination.

The real case for avocado is narrower and holds up: fat and fibre together produce satiety, and the fat improves what you absorb from the vegetables it is eaten with. That is enough.

Against the other fats here

Against nuts: similar calorie density, more water, more fibre per calorie, and the absorption effect that nuts do not have. Nuts win on convenience and shelf life by a wide margin.

Against olive oil: the same dominant fat, and avocado brings fibre and micronutrients that oil does not. Oil wins decisively on cost and on not spoiling.

Against oily fish: not comparable, because the fats are different. Avocado carries no meaningful omega-3, and no amount of it replaces what a tin of sardines does.

Avocado is the most expensive way to get fat on this site and the only one that improves what you absorb from the rest of the plate. Whether that trade is worth it depends on the budget rather than the physiology.

The cost question

A whole avocado costs several times what the same calories would cost as olive oil, and considerably more than the same satiety would cost as potato or oats.

If the budget is a constraint, olive oil in a dressing achieves the absorption effect at a fraction of the cost, and the fibre can come from elsewhere.

Avocado is a good food and it is not a necessary one.

One thing about latex allergy

Worth a brief mention because it is not widely known.

There is documented cross-reactivity between latex allergy and certain foods, avocado among them, along with banana, kiwi and chestnut. It is called latex-fruit syndrome.

Anybody with a known latex allergy who reacts to avocado should treat that as a medical question rather than a food preference. It appears here because a fighter reacting to avocado without knowing why has a specific thing to ask a doctor about, rather than a vague intolerance to investigate.

Frozen and pre-prepared

Frozen avocado chunks are consistent and solve the ripeness problem entirely. The texture suffers, which does not matter if it is going into something blended.

Ready-made guacamole is a different product. Check for added oil, which some brands use, and for sodium, which most contain in amounts worth knowing about in one specific week.

Avocado oil is a cooking oil. It carries the fat and none of the fibre, which makes it a different food entirely.

Where it sits by phase

Count it where it belongs

• Count it as a fat, not a fruit. One avocado is 227 calories and it is a component of the meal.
• Half is usually the right amount. The label serving is a third, which nobody eats.
• Have it with the salad rather than instead of one. It increases what you absorb from everything else on the plate.
• The potassium is real and it is not a cramp solution.
• And take it out at the start of the low-residue phase along with the nuts.