Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2021 Apr 29;12:641090. doi: 10.3389/fphar.2021.641090

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Copyright © 2021 Alehaideb, Sheriffdeen and Law.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

PMC Copyright notice

(A) Time course of caffeine concentration in the plasma of volunteers before and after pre-treatment with an extract of A. majus, A. archangelica, C. monnieri, and R. graveolens. Each point is plotted as mean ± SD. Empty squares represent caffeine concentrations in volunteers with no ARFP extract pre-treatment. Filled squares represent caffeine concentrations in volunteers with ARFP extract pre-treatment 3.0 h before receiving the caffeine tablets. (B) Time course of caffeine concentrations in the plasma of volunteers before and after pre-treatment with an extract of P. aniseum, P. crispum, A. pubescens, A. graveolens seeds, and A. graveolens flakes. The point is reported as mean ± SD. Empty squares represent caffeine concentrations in volunteers with no ARFP extract pre-treatment. Filled squares represent caffeine concentrations in volunteers with ARFP extract pre-treatment 3.0 h before receiving the caffeine tablets.