NAF will be the title sponsor of British Riding Clubs (BRC) Five Star National Horse Trials Championships 2017.
Qualifiers will start from 1 April 2017, with 600 riders competing at the Championships in August.
The three-day-event will offer competitors the chance to take on the long format competition, incorporating roads and tracks and steeplechase as well as the cross-country course.
There will also be entertainment for competitors and spectators including a welcome drinks party and a hotly-contested quiz in aid of charity.
Rachael Hollely-Thompson, BRC Competitions Manager, said: "We are thrilled to be working with long term BRC supporters NAF for a second BRC Championship.
Their support helps BRC to continue to offer fantastic events to the membership."
"Their advice to members on nutritional matters is invaluable and they always help us to create a wonderful atmosphere at our events."
Melissa Newman, NAF’s Brand Manager, said: "NAF are very proud to continue to support such an outstanding and growing organisation as British Riding Clubs.
"As the UK’s leading supplier of the most comprehensive range of advanced, natural and nutritional products and official suppliers to Team GBR, the continued alignment between our organisations, our commitment to Clean Sport and the club ethos of being ‘better together’ has never been more apparent.
"We know that this will be a very successful 2017 and are looking forward to the Championships!”