Urinary excretion of ecdysterone and its metabolites following spinach consumption.

Only a small proportion of ecdysterone from spinach was excreted into urine. No significant differences were found in concentration and recovered amount (%) of ecdysterone, 14-deoxy-ecdysterone, and 14-deoxy-poststerone in urine between sautéed spinach and smoothie ingestion. A discrimination between ecdysterone from food or preparations will be challenging based on urinary concentrations only at least for later post-administration samples. This article is protected by copyright. All rights reserved.