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Botanical

Chlorophyll

Chlorophyll is the green pigment plants and algae use to capture light. Supplements usually contain chlorophyllin, a water-soluble derivative containing copper.

Also listed as Chlorophyllin

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Color changes and testing

Oral products can discolor stools or urine; diarrhea is reported. Chlorophyllin can cause false-positive guaiac stool-blood tests. The Linus Pauling Institute advises avoiding these supplements during pregnancy and breastfeeding because safety has not been tested. 1

Does food-coloring use settle safety?

The Commission summarized EFSA’s conclusion that chlorophylls at reported food-additive uses raised no safety concern, while the data were inadequate to set an acceptable daily intake. This is a limited assessment of specified food uses, not confirmation that every concentrated supplement or derivative is safe. 2

For information, not individual medical advice. Ingredient studies do not establish the effectiveness of these products.

Sources