The product's label includes a caution stating that Relentless is not suitable for children, pregnant women or those sensitive to caffeine.

[1] The Relentless brand magazine This Is the Order (commissioned by Erasmus Partners in 2008) was created and designed by Rebecca Wright in collaboration with The Church of London Publishing.

Relentless Energy has produced two feature-length documentary films which focus on the area of extreme sports.

The first, which was released in May 2009, called Powers of Three, is a surf documentary set in Ireland and was available to watch for free on the Relentless Website.

Lewis Gregory, Jamie Law and Alex Snow are the riders for the team, which will compete in all the major UK and European MX2 events.

Relentless was the title sponsor of Faithless frontman Maxi Jazz in 2006 during his Porsche Carrera Cup Great Britain campaign.

Mike & Andrew Jordan also had Relentless sponsorship on their British Touring Car Championship Honda Integras.

There were large stalls shaped like giant Relentless cans solely dedicated to selling the drink.

Since 18 July 2013, Relentless has been the main sponsor of the FC St. Pauli professional men's football team in Hamburg, Germany.