Lonza’s ResistAid Deemed Safe


A tolerability study found no difference in health impacts between the larch tree extract and placebo.


Lonza (Basel, Switzerland) reports that its ResistAid ingredient-a larch tree extract containing arabinogalactan and polyphenols-is “safe as placebo.” The statement is based on a recent tolerability study conducted on ResistAid and 199 subjects. Results are published in the journal Food and Nutrition Sciences.

Analyze and Realize AG assigned subjects to 4.5 mg of ResistAid or placebo daily for 12 weeks, assessed subjects for adverse events and other clinical parameters, and interviewed subjects for self-assessment of their health.

“The tolerability was rated as ‘very good’ or ‘good’ by the investigators for 99% of the subjects, and by 98% of subjects in self-assessment with no statistical differences to placebo,” says lead author and coordinating investigator Barbara Grube, MD. “There were no differences concerning the incidence of adverse events between the two groups. Therefore, the intake of ResistAid over a period of 12 weeks can be considered as safe as placebo.”

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