Gmail “clips” emails due to formatting sizes and because the content is too big for Gmails platform. To prevent this you can shorten your emails to only contain relevant content . You can insert hyperlinks to redirect users for more information if they are interested.
Test your email before sending it out so you can ensure that Gmail wont “clip” the email. If the email is “clipped” in the test email then you can go back and shorten and rearrange your message.