Evidence supporting the use of: Blessed thistle
For the health condition: Nursing

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Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Blessed thistle (Cnicus benedictus) has been used traditionally as a galactagogue, an agent that may help stimulate or increase breast milk production in nursing mothers. Historical records from European herbal medicine, dating back to the Middle Ages, describe its use to promote lactation, often alongside herbs like fenugreek. The traditional rationale is rooted in the “doctrine of signatures” and centuries of anecdotal reports rather than robust scientific experimentation.

Modern evidence for the effectiveness of blessed thistle for increasing milk supply is limited. Some small case studies and surveys suggest that women who consume blessed thistle, often in combination with fenugreek, report increases in milk production. However, these reports are generally uncontrolled, rely on self-reporting, and are subject to placebo effects. Systematic reviews and clinical trials directly studying blessed thistle’s lactogenic effects are scarce, and leading organizations such as the Academy of Breastfeeding Medicine note insufficient scientific data to confirm its efficacy or safety for this purpose. There is also a lack of standardization in dosing and preparation.

In summary, while blessed thistle has a long history of traditional use to support nursing, there is little scientific evidence to validate its effectiveness as a galactagogue. Mothers considering its use should consult a healthcare provider, especially since herbal supplements can interact with medications or cause allergic reactions.

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