
Amin, who had been in the role for four years, focused on improving health credentials across PepsiCo's brand portfolio, which includes Walkers and Tropicana.
PepsiCo signed up to the government's Change4Life anti-obesity drive last November, pledging to support Play4Life by funding ads and using its contracted sporting talent to promote the benefits of play and an active lifestyle. It also committed to the Breakfast-4Life initiative.
Amin has played a vital role in PepsiCo's anti-obesity drive, although he has conceded that the activity began well before he took over from Martin Glenn as the company's most senior marketer in 2005.
PepsiCo UK has not promoted its core Pepsi brand since 2004. Since 2005, it has reformulated its Walkers, Quavers and Monster Munch crisp brands to reduce their saturated-fat content.
During Amin's time in the UK operation, the Walkers crisps brand has undergone the broadest transformation.
Earlier this year, Walkers ran a 'Do us a flavour' campaign, which asked consumers to devise new variants. In 2007, it became the first brand to carry the Carbon Trust's carbon-reduction label on pack.
Cilla Snowball, chairman at PepsiCo UK's ad agency, Abbot Mead Vickers BBDO, said: 'Salman has led an action-packed agenda over his tenure, delivering on all fronts as well as putting strong succession management in place.'
Amin's global role is based in New York. He will report to PepsiCo chief executive Indra Nooyi and John Compton, chief executive of PepsiCo Americas Foods. A former Procter & Gamble executive, Amin will be replaced by Richard Evans, general manager of Walkers Snack Foods.