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健康的な成人における標準的なコロストラム摂取量では
循環IGF-Iレベルの上昇には繋がらず
前立腺がん等への影響も心配しなくていいのでは

Oral bovine colostrum supplementation does not increase
circulating insulin-like growth factor-1 concentration in healthy adults:
results from short- and long-term administration studies
https://link.springer.com/article/10.1007/s00394-019-02004-6
>concerns have been raised that if circulatory IGF-1
>is raised in response to colostrum supplementation,
>prolonged administration of colostrum might stimulate
>malignancy in distant organs such as prostate cancer
>which is known to commonly express IGF-1 receptors [13].

>In summary, we conclude that ingestion of standard doses of
>colostrum (20–40 g/day) in healthy adult subjects does not result
>in an immediate or long-term increase in circulating IGF-I levels.