The science behind Lectranal®

Human studies

Astragalus membranaceus: get through the pollen season with the strengthened immune system and less complaints!

Berger UE, Dirr L, Schilling J. Medical University of Vienna poster.
53. Scientific advanced training of the Austrian Chamber of Pharmacists March 8-11, 2020 Schladming

Study design: Crowd-sourced-data

Treatment: 328 study participants suffering from birch pollen, grass pollen and/or ragweed pollen allergies were taking 1 capsule of Lectranal® Acute a day for 8 weeks during the pollen season of 2018 starting two weeks prior the beginning of the season. Participants experiencing acute symptoms were allowed to increase the intake to 2 capsules a day. The crowd-sourced symptoms data collected with the help of the pollen diary with almost 305 000 entries served as the baseline and were used for comparison with the participants of the study.

Lectranal® has a positive effect on nasal allergy symptoms with better results than the baseline group.


Efficacy and safety of Astragalus membranaceus in the treatment of patients with seasonal allergic rhinitis

Matkovic Z, Zivkovic V, Korica M, Plavec D, Pecanic S, Tudoric N. Phytother Res. 2010. 24(2): 175-181.

Study design: Double-blind, placebo-controlled clinical trial

Treatment: 48 patients with moderate to severe seasonal allergic rhinitis (SAR) who are allergic to specific pollens were divided randomly into 2 groups receiving either Lectranal® or a placebo (2 capsules, twice daily) for 6 weeks.

Lectranal® is efficient and safe in the treatment of allergic rhinitis and has significantly better results for several outcomes when compared to placebo.

Animal studies

Lectranal® regulates the expression of 21 different genes involved in the inflammatory process

Hadžija M., Hadžija Popović M., Korolija M., Lectranal®, INFLAMMATORY REACTION AND GENE EXPRESSION IN MOUSE SPLEEN, Ruđer Bošković Institute, Zagreb 2005

Lectranal® is a powerful immunoregulator

Hadžija M., Popović Hadžija M., Korolija M., Križanac S., THE EFFECT OF Lectranal® ON THE IMMUNOREGULATION OF INFLAMMATORY PROCESSES IN MICE (ikbkg, relb, and cd3e gene activity, using RT-PCR technology), Ruđer Bošković Institute, Zagreb 2006

Lectranal® treatment significantly increases the IgG concentration

Hadžija M., Popović Hadžija M., Korolija M., AN ASSAY FOR IMMUNOGLOBULINES IN THE BLOOD OF MICE TREATED WITH Lectranal®, Ruđer Bošković Institute, Zagreb 2006

Lectranal® reduces skin edema

Hadžija M., Popović Hadžija M., Korolija M., Lectranal® AND INTRADERMAL INFLAMMATORY REACTIONS, Ruđer Bošković Institute, Zagreb 2006


Astragalus - Classified as "herb that can safely be consumed when used appropriately"

American Herbal Products Association

Lectranal® - No toxicity effects of any kind + good safety record

Hadžija M., Popović Hadžija M., Korolija M., Križanac S., Lectranal® - PRECLINICAL TOXICOLOGICAL STUDY, Ruđer Bošković Institute, Zagreb 2007