Help with sentences

Can somebody please help me with my English?
Regards,
Fizzi

1- This review provides the current body of evidence on the X which will assist researchers in designing future studies.

2- However, the variability in indicators utilised in assessing the X across studies made collation of study results difficult.

3-There appears to be no consensus among researchers of the most appropriate indicators. Most studies assessed R, A and C as indicators for quality of information.

4- Nutraceutical companies may provide advertisements with complete information, supported by evidence and adhere to guidelines however this does not mean that the advertisements are supporting M.

5- This raises the question whether they are appropriate indicators of the quality of information. In addition to that, this review highlights the need for studies that focus on common definitions and adapt similar methods. That effort will minimize the heterogeneity of data that had been facing by this review and allow direct comparison between studies.