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Botanical

Blessed thistle

Blessed thistle (Cnicus benedictus) is a thistle-like plant of the daisy family from the Mediterranean. Its bitter herb is used traditionally for appetite and digestion.

Also listed as Cnicus benedictus, Carduus benedictus, Holy Thistle, St. Benedict's thistle

Women's HormonesGut HealthOrgan FunctionWeight Management

What it is studied for

The strongest rated effects first. Bars show the size of the effect, the letter grades the evidence, and each rating lists the studies behind it.

Menstruation SupportWomen's HormonesSmallCNo linked study
Bloating & gas reliefGut HealthSmallCNo linked study
LiverOrgan FunctionSmallCNo linked study
Gut healthSmallCNo linked study
Appetite & CravingsWeight ManagementNo effectFNo linked study
Every rating with its studiesGrouped by health goal, with the publications behind each rating

What is blessed thistle used for?

EMA recognizes preparations of Cnicus benedictus herb for traditional use in temporary appetite loss and mild digestive complaints. This classification rests on longstanding use, not established efficacy from clinical trials. 1

Why people take it

Immune Support17.9%
Essential Health17.9%
Energy10.3%
Detox8.3%
Gut Health7.6%
Bone & Joint6.9%

SuppCo community snapshot, 2026-09-28. Reasons for use are not evidence that it works.

Questions people ask

Does traditional use mean proven benefit?

No. EMA’s traditional-use category does not establish efficacy through clinical trials. 1

Is it a proven breastfeeding aid?

LactMed reports no valid trials establishing increased milk production. Safety information for nursing infants is also lacking. 2

Sources

  2. Blessed Thistle Drugs and Lactation Database (LactMed), 2022