January 19, 2021 Social media messages Source: Medical Express Sending direct messages on social media informing people of the negative health and environmental impacts of consuming meat has proven successful at changing eating habits, a new study from Cardiff University has shown. senger led to a significant reduction in the amount of red and processed meat the participants consumed over a 14-day period. Participants reported, on average, eating between 7 and 8 portions of red or processed meat during the previous week before the Facebook messages were sent, which then dropped to between 4 and 5 portions during the second week of the intervention and stayed at roughly the same level one month after the intervention.