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Bioaccessibility (%) of (A) steroidal sapogenins contained in HFE, (B) diosgenin (DG) from standard and from HFE, and (C) oleanolic acid (OA) from standard and from HQE after their in vitro gastrointestinal digestion. Mean values are significantly different to the standard if p ≤ 0.05 (*) and p ≤ 0.001 (***).
