Chlorella explained: what it is and its nutrients

The NIH says chlorella is a freshwater green alga that contains protein, fiber, vitamins, minerals, carotenes and chlorophyll, with a high vitamin K content. One of the products we reviewed lists chlorella, and no label prints its individual amount.

In the products we reviewed
1, its label does not print the amount

What chlorella is

  • Chlorella is a freshwater green alga.1
  • Chlorella contains protein, fiber, vitamins and minerals.1
  • Chlorella contains carotenes and chlorophyll.1
  • Chlorella has a high vitamin K content.1

How much chlorella each product gives

Per serving, as each label prints it

Amount not printed: the dashed line shows the most it can be, the whole blend

DentiCoreNot printed · at most 120 mg

Before you take it

Side effects

  • Chlorella can cause nausea, diarrhea, abdominal cramps, gas and green stools.1
  • Allergic reactions, including asthma and anaphylaxis, have been reported in people taking Chlorella or preparing its tablets.1
  • Reactions involving sensitivity to light have occurred after taking Chlorella.1
  • Green discoloration of breastmilk has been reported.1

Ask a doctor first

  • Ask your healthcare provider for breastfeeding advice specific to your situation.1

These statements have not been evaluated by the FDA. A supplement is not a medicine.

The product we reviewed that lists chlorella

ProductForm and servingChlorella per servingOur scorePrice a bottleBuy
DentiCore#4 in oral health supportSoft tablets1 tabletNot printedIn a 120 mg proprietary blend8.9$49Check price
Prices checked Oct 11, 2026

Questions people ask

What is chlorella?

Chlorella is a freshwater green alga, according to the NIH. The NIH says it contains protein, fiber, vitamins, minerals, carotenes and chlorophyll, and has a high vitamin K content.

Which supplements contain chlorella?

DentiCore is the product we reviewed that lists chlorella. Its soft tablets list chlorella inside a 120 mg proprietary blend, without printing chlorella's individual amount. The serving is 1 tablet.

What are chlorella's side effects?

Chlorella can cause nausea, diarrhea, abdominal cramps, gas and green stools. Green discoloration of breastmilk has also been reported.

Is chlorella safe?

Chlorella has reported side effects and allergic reactions, including asthma and anaphylaxis. Sensitivity to light has also occurred after taking chlorella. If you are breastfeeding, ask a clinician for advice specific to your situation before starting chlorella.

Sources

The products, amounts and prices come from each product's label and checkout, as its review shows them. AI drafts our pages from listed sources, figures are checked against them, and we have not tried the products.

  1. 1NIH LactMed, Chlorellancbi.nlm.nih.gov/bookschecked