Lychee

Food · Fruit · Food, Typed Supps

Lychee is a sweet, juicy fruit packed with vitamin C — but eating a big bowl of them with an empty stomach is a real risk for young, malnourished kids.

Stage by stage

Peeling & chewing (Mouth): Chewing breaks open the thin skin and releases the sweet, water-rich aril and its natural sugars.
Stomach (Stomach): The stomach empties the water- and sugar-rich fruit relatively quickly since it contains little fat or fiber to slow digestion.
Small intestine (Small intestine): The small intestine absorbs vitamin C, potassium, and natural sugars into the bloodstream.
Bloodstream (Blood & liver): Vitamin C and glucose circulate for use by immune cells and tissues, while the liver metabolizes any absorbed fruit compounds.

Timing

Lychee works well as a stand-alone snack or dessert; it is best not consumed in large quantities on a completely empty stomach, particularly by young or malnourished children.

Time to effect

Days: Vitamin C from lychee is absorbed within hours and used by the body quickly since it isn't stored long-term, so regular intake over days to weeks is what sustains adequate status.

Allergens

None of the fourteen major allergens. Derived from what this food is, not from a product label.

Eating patterns

Fits: Vegan, Vegetarian, Pescatarian, Halal, Kosher, Gluten-free. Depends on the product: Low-FODMAP.

In season

June to August in the northern hemisphere, December to February in the southern.

Satiety

146 on the satiety index, where white bread is 100 — high. Modelled from the Holt et al. (1995) measurements.

Environmental footprint

1.1 kg CO2e and 199 litres of freshwater per kg, matched to "Other fruit" in Poore & Nemecek (2018), Science 360.

Cost band

Cheap — roughly £3 per kg, as a band midpoint rather than a price.

Key nutrients

Nutrition per 100g

Calories: 71.2
Protein: 0.8g
Carbohydrate: 16.8g
of which sugars: 16.8g
Fat: 0g
of which saturated: 0g
Fibre: 1.2g
Sodium: 0mg

Food vs. supplement

Whole lychee delivers roughly 72 mg of vitamin C per 100 g (about 80% DV) along with fiber, potassium, and water, whereas a vitamin C supplement provides only the isolated compound without the fruit's fiber or micronutrient matrix.

Kitchen tip

Keep lychees refrigerated and peel just before eating; the skin browns and the flesh loses vitamin C quickly once picked or peeled.

Common myth

"Lychee poisoning in children was just an unexplained seasonal virus outbreak, not the fruit's fault." In reality: Case-control studies published in The Lancet Global Health (2017) identified the naturally occurring toxins hypoglycin A and methylenecyclopropylglycine (MCPG) in lychee arils as the cause of outbreak hypoglycemic encephalopathy in Muzaffarpur, India — the toxins block fatty-acid oxidation and gluconeogenesis, triggering severe hypoglycemia in fasted, malnourished children, not a virus.