Limited evidenceGeneral health

Chlorophyll

Liquid chlorophyll went viral for clear skin, deodorizing and weight loss — none of which has decent human trial support. The one well-documented effect is chemoprevention against aflatoxin, established in a rural Chinese population with heavy dietary exposure, which has nothing to do with why people buy it.

What the science says

Chlorophyllin reduces aflatoxin-DNA damage Moderate evidence
In a randomized, double-blind, placebo-controlled trial in Qidong, China, 180 adults with high dietary aflatoxin exposure took 100 mg chlorophyllin three times daily for four months; urinary aflatoxin-N7-guanine adducts fell by about 55% versus placebo. Follow-up work confirmed chlorophyllin binds aflatoxin in the gut and blocks its absorption. This is real chemoprevention in a high-exposure population, not a general detox mechanism relevant to well-fed Western diets.
Internal deodorant effect is limited to a rare metabolic disorder Limited evidence
In patients with trimethylaminuria (fish odor syndrome), copper chlorophyllin at 60 mg/day for three weeks significantly reduced urinary trimethylamine excretion. Outside this rare condition there is no controlled evidence that chlorophyll reduces body odor, breath odor or stool odor; the older nursing-home deodorizing literature is uncontrolled and decades old.
No credible evidence for acne or skin clearing Limited evidence
The viral claim rests on a handful of tiny open-label pilot studies of topical chlorophyllin gel in acne and photoaging, typically 10-24 participants with no placebo arm. There are no randomized trials of oral chlorophyll drops for acne, and no plausible mechanism by which a poorly absorbed green pigment clears sebaceous inflammation.
Weight loss claims come from a different compound Limited evidence
The weight-loss studies circulating online used spinach-derived thylakoid membranes at around 5 g/day, which delay fat digestion and increase satiety hormones — not chlorophyll drops, which supply milligram quantities of sodium copper chlorophyllin. Conflating the two is the single most common error in this category's marketing.

Dosage & safety

Studied doseChlorophyllin at 100 mg three times daily (300 mg/day) was used in the aflatoxin chemoprevention trials; 60 mg/day was used in trimethylaminuria. Consumer liquid drops usually supply 50-100 mg of sodium copper chlorophyllin per serving in water. Note that supplements contain chlorophyllin — a semi-synthetic, water-soluble, copper-substituted derivative — not the natural magnesium-centred chlorophyll in leaves, which is poorly absorbed. Eating leafy greens does not deliver a comparable chlorophyllin dose.

SafetyGenerally well tolerated. Expect green discoloration of stool, urine and tongue — harmless but alarming if unexpected, and it can be mistaken for melena. GI upset, cramping and diarrhea occur, mainly at higher doses. Photosensitivity has been reported occasionally; use sun protection. Chlorophyllin supplies copper, which matters in Wilson disease or alongside high-dose supplemental copper. Because it binds compounds in the gut, separate from medications by at least 2 hours. Safety in pregnancy and breastfeeding is not established. Not banned in sport. Liquid products are often preserved and flavored — check labels if you are sensitive to additives.

Scientific references

Chlorophyllin intervention reduces aflatoxin-DNA adducts in individuals at high risk for liver cancer
Egner PA, et al. — Proc Natl Acad Sci U S A, 2001
Effects of the dietary supplements, activated charcoal and copper chlorophyllin, on urinary excretion of trimethylamine in Japanese trimethylaminuria patients
Yamazaki H, et al. — Life Sci, 2004

Where to buy

Codeage, Chlorophyll Liquid Drops, Peppermint, 2 fl oz (60 ml)

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