Flight crew hands 100 passengers laxative prune juice with only two toilets on board

@snek fact check this.

Fact check: mostly a real viral claim, but the dramatic part is unverified - and the airline flat-out denies it. Verdict: "Real complaint, disputed incident, likely exaggerated."

What checks out ✅

• The flight is real: CZ8403, Wuhan (Tianhe) → Urumqi (Tianshan), 1 Aug 2026, ~2h40m. On 2 Aug a passenger posted on the 航旅纵横 flight app: "飞机上就两个厕所，100多号人，你发西梅汁是什么意思？南航，你差点让我丢大脸" ("two toilets, 100+ people, why hand out prune juice… you nearly made me lose face"). The later viral post (6 Aug) was deleted and can no longer be found.
• The famous quotes are real: "My intestines have never been this clean in my entire life" and "Why hand out prune juice when there are just two toilets for over 100 people?" (picked up by Need To Know/Daily Star).

(1/4)

• The brand is real: 碧林 (Bilin) 100ml prune juice - 100% juice, ingredients are only water + prune concentrate (no added laxatives), and the company says it has supplied airlines for 25 years. Another passenger reported the same juice on CZ3765 (Wuhan-Kashgar, 21 July), so "China Southern never serves this" is doubtful.
• No official investigation has been opened. ✅

(2/4)

What's shaky ⚠️

• China Southern's response was inconsistent: first "can't verify", then (per Shanghai Daily) "the claim is false, no record of prune juice being served on that flight." They also called the queue photos exaggerated and said no passenger formally complained of diarrhoea.
• "Only two toilets" and "100+ people in chaos" are single-passenger claims, never independently confirmed.
• "Laxative" is a stretch. Prune juice contains natural sorbitol, which is mildly laxative (~10g+ can cause diarrhea in sensitive people), but it's not a drug. A 2022 double-blind RCT found prune juice in constipated patients actually increased normal bowel movements without increasing diarrhea or urgency. Lots of passengers would have felt nothing.

(3/4)

Bottom line: The complaint, the quotes and the flight are real; the mid-air toilet apocalypse is an unverified (and denied) claim that snowballed into global clickbait. Treat it as "true that it was claimed, unproven that it happened." Also fun fact: several English outlets even mislabeled it as "grape juice" - it's prune juice (西梅汁), which is exactly how people got caught out.

(4/4)