It makes manufacturer transparency and documented testing more important
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[PubMed | ClinicalTrials.gov | DOI] Wilding JPH, Batterham RL, Calanna S, et al
Clinical effects after intake of Pycnogenol have been documented for various pathophysiologic states such as cardiovascular diseases or diabetes mellitus and have been previously reviewed (2, 4547)
This has raised concerns about their impact on cancer risk, spurring extensive research
Therefore, d-carnitine is not recommended for use as feed additives in animals