Mullein Leaf Extract - Standardized

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Swanson Mullein Leaf Extract capsules contain a standardized 4:1 extract of pure mullein leaf. Dioscorides, the ancient Greek pharmacologist who wrote the original Materia Medica, is believed to be the first to employ this herb traditionally used for respiratory support. This remains its primary use today, and herbalists from China to California still recommend it just as Dioscorides did over 2,000 years ago. 


Supplement Facts

Serving Size 1 Capsule

Servings Per Container 60

Amount Per Serving % Daily Value
Mullein Leaf (Verbascum thapsus) 250 mg *
Mullein Leaf Extract 4:1 (Verbascum thapsus) (Equivalent to 250 mg) 62.5 mg *

*Daily Value not established.

Other Ingredients: Gelatin, microcrystalline cellulose (plant fiber), maltodextrin, magnesium stearate, silica.

Suggested Use: As a dietary supplement, take one capsule two times per day with water.

Warning: For adults only. Consult your healthcare provider before using this or any product if you are pregnant or nursing, taking medication or have a medical condition.

Storage Instructions: Keep out of reach of children. Do not use if seal is broken. Store in a cool, dry place.




  1. What is mullein leaf extract and what is it used for?
    Mullein (Verbascum thapsus) is a traditional herbal ingredient that has been used for centuries to help support respiratory wellness and overall lung health. Swanson Mullein Leaf Extract provides concentrated mullein leaf extract in a convenient capsule form to help support healthy breathing, respiratory comfort, and everyday wellness as part of a balanced lifestyle.
  2. How does mullein support respiratory health?
    Mullein is commonly used in herbal wellness practices to help support healthy respiratory function and overall lung wellness. Many individuals incorporate mullein supplements into their daily routines to help maintain respiratory comfort and support healthy breathing, particularly during seasonal changes and exposure to environmental stressors.
  3. What are the benefits of a standardized mullein extract?
    Standardized herbal extracts are formulated to provide consistent levels of key plant compounds. Swanson Mullein Leaf Extract offers concentrated mullein support in a convenient capsule format, helping ensure product consistency and reliable daily respiratory wellness support. Standardized extracts are often chosen by consumers seeking targeted herbal supplementation.
  4. Can mullein be taken every day?
    Many adults use mullein as part of their ongoing respiratory wellness routines. Consistent daily use may help support healthy breathing, lung wellness, and overall respiratory function as part of a healthy lifestyle. Always follow the suggested use directions on the product label and consult a healthcare professional if you have questions about long-term supplementation.
  5. When is the best time to take Swanson Mullein Leaf Extract?
    Adults typically take one capsule daily with water. Mullein can generally be taken with or without food according to personal preference. Consistent daily use may help support respiratory wellness, healthy breathing, and overall lung health over time as part of a balanced wellness routine.
  6. Is Swanson Mullein Leaf Extract non-GMO?
    Yes. Swanson Mullein Leaf Extract is formulated with non-GMO ingredients, making it a convenient choice for individuals seeking clean-label herbal wellness support. This non-GMO formula provides concentrated mullein leaf extract to help support respiratory wellness, healthy breathing, and overall well-being as part of a balanced lifestyle. Consumers looking for supplements that align with non-GMO preferences can confidently incorporate this product into their daily wellness routines.