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MORTAR & KETTLE
Apothecary of Flavor
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SMOOTHIE · №044

Two-Kiwi Smoothie

the trial dose of kiwifruit, blended cold with yogurt, cucumber, ginger and mint

Two green kiwifruit a day is the dose that moved the needle in three constipation trials, and the whole fruit went in, seeds and all. This blend is built around that number and around what the FODMAP tables allow: kiwifruit and cucumber are low, the yogurt's lactose is partly digested by its own cultures, and there is no banana, honey or mango because ripe banana and honey sit on the high side of the same tables. Ginger goes in for its measured effect on the stomach, mint for the cool, and neither is claimed to do more than the trials showed. No sweetener. If it needs one, a teaspoon of maple syrup, which the tables rate low, rather than honey, which they do not. It is tart, green and cold, and it is a breakfast, not a treatment.

Easy5 minForgiving
TartFruityMintyDigestiveCoolingImmune
Two-Kiwi Smoothie · finished

Method

Check off each step as you go. Your progress is saved. Amounts below already match your batch size.

Peel. Trim the ends off the kiwifruit and peel them; leave the cucumber skin on.
▸150 ggreen kiwifruit▸100 gcucumber
Blend. Kiwifruit, cucumber, yogurt, ginger, mint and the cold water into the blender, and run it until the seeds are flecks.
▸150 ggreen kiwifruit▸100 gcucumber▸100 gplain yogurt▸5 gfresh ginger▸3 gfresh mint▸60 mlfiltered water
Adjust. More water if it is too thick, a second thumb-tip of ginger if you want heat, and a teaspoon of maple syrup only if the fruit is sour.
▸60 mlfiltered water▸5 gfresh ginger
Serve. Pour and drink it straight away, cold.
“Grind the seeds, blend it whole, and the macros take care of themselves.”
THE MORTAR & KETTLE METHOD

The chemistry

SKELETAL STRUCTURES

6 compounds carry this recipe. Here is what each one does and, where we have it, what it actually looks like.

C₆H₈O₆
ascorbic acid
C₆H₈O₆

Green kiwifruit carries about 93 mg of vitamin C per 100 g, so the two fruit in this glass bring roughly 140 mg, more than a large orange. It is the one nutrient claim here that needs no hedging.

Immune
C₆H₈O₇
C₆H₈O₇

Kiwifruit's sourness is citric acid with quinic and malic beside it, sharp enough that the blend needs no lemon and, most days, no sweetener.

Tart
C₆H₁₂O₆
C₆H₁₂O₆

About 9 g of sugar per 100 g of kiwifruit, balanced by glucose, which is why the FODMAP tables rate the fruit low where they rate honey and ripe mango high: it is excess fructose over glucose that goes unabsorbed.

Fruity
C₁₇H₂₆O₄
C₁₇H₂₆O₄

In two randomised trials, 1.2 g of ginger sped the stomach's emptying, by half in healthy volunteers, without changing how anyone said they felt. A thumb-tip of fresh root is a smaller and less certain dose; it goes in for the heat, with the trial result as a footnote.

Digestive
C₁₀H₂₀O
C₁₀H₂₀O

Menthol reads as cold on the tongue because it trips the same TRPM8 receptor that ice does. The peppermint that helps irritable bowels in trials is an enteric-coated oil capsule, not leaves in a drink; these leaves are here for the cool.

MintyCooling
C₃H₆O₃
C₃H₆O₃

The cultures that soured the milk also carry their own lactase into the gut, which is why the lactose in yogurt is absorbed far better than the same lactose in milk. A 100 g serve holds about 5 g of lactose, under the 12 g most lactose-intolerant adults tolerate at a sitting.

Digestive

Nutrition

ESTIMATED · WHOLE RECIPE

A rough estimate for everything this recipe makes: the whole batch, not one serving. It moves with the batch size you set above.

Nutrition Facts
Whole recipemakes 1 batch
Amounts are for the entire recipe, not one serving.
Calories174
% Daily Value*
Total Fat 4.2g5%
Saturated Fat 2.2g11%
Trans Fat 0g
Cholesterol 13mg4%
Sodium 54mg2%
Total Carbohydrate 32g11%
Dietary Fiber 5.3g19%
Total Sugars 20g
Protein 6g12%
Vitamin A 44mcg5%
Vitamin C 144mg160%
Calcium 196mg15%
Iron 1mg5%
Potassium 808mg17%
* Percent Daily Values are based on a 2,000 calorie diet.

An estimate, summed from USDA reference values (6 of 6 ingredients counted). Oil for frying and water for boiling are left out; everything else is counted as listed. Real numbers shift with brand, ripeness, and how it's cooked. Treat it as a ballpark, not dietary or medical advice.

Possible side effects

USE WITH CARE
  • Two kiwifruit a day is the dose that moved bowel frequency in the constipation trials; if you already run loose, halve it. Kiwifruit is a common food allergen: if your mouth itches at the first sip, stop.
  • Plain yogurt carries about 5 g of lactose per 100 g, under the 12 g most lactose-intolerant adults tolerate at once. If that is still too much, lactose-free yogurt blends the same.

These notes are educational, not medical advice. Read the terms

On the table together

THE INDEX, LINKED

This recipe is part of a set: follow the thread through the blends it uses and what it's served with.

FROM THE JOURNAL

The reading behind this recipe

Bloating, and what a smoothie can actually do about it
№57Chemistry

Bloating, and what a smoothie can actually do about it

The belly that swells by evening usually holds barely more gas than it did at breakfast. What the CT scans found, which trials a kiwifruit has actually moved, why the yogurt is allowed and the honey is not, and the enzyme claims that do not survive the stomach.

23 September 2026·11 min read·56 SOURCES