SAO PAULO (Reuters) - Coca-Cola Co (>> The Coca-Cola Co), Ambev SA (>> Ambev SA) and Britvic Plc (>> Britvic Plc) have shown preliminary interest in buying a stake in Brazilian juice maker Natural One SA, as global beverage giants seek to grow their platform of healthy drink choices, according to two people familiar with the matter.

Natural One, based in the southeastern town of Jarinu and founded 10 years ago by Ricardo Ermirio de Moraes, a member of the family that owns Brazil's largest industrial conglomerate, has hired the investment banking unit of Banco ABC Brasil SA (>> Banco ABC Brasil SA) to oversee the process, said the people.

At least three investment firms, one of them teaming up with an unnamed Brazilian agribusiness tycoon, are also analyzing Natural One and may enter the process, said the people, who requested anonymity because the process remains private.

Ricardo Ermirio de Moraes, whose family owns orange juice producer Citrovita SA and who himself was a president of that company, has yet to decide whether to sell a minority stake or control of the company, the first person said, adding that he seeks a value of around $150 million for the entire company.

Coca-Cola, Britvic and Natural One did not initially comment. Ambev and ABC Brasil, the local unit of Arab Banking Corp., declined to comment.

The deal underscores the growing relevance of non-carbonated drinks in the portfolio of global beverage giants, which are struggling with a widespread sugar and additives backlash among more health-conscious consumers. Increased takeover activity in that segment is boosting the allure of natural food and beverage start-ups selling natural juice at a premium.

Consumer staples deals accounted for almost 4 percent of mergers and acquisitions announced globally this year, with transactions fetching prices equivalent to an average 16.6 times operational profit - only trailing real estate and healthcare deals around the world, according to Thomson Reuters deals intelligence data.

Geographically speaking, an acquisition of Natural One could help a buyer gain further access to Brazil, the world's fifth largest market for natural food products. Healthy soft drinks are expected to grow 10 percent in Brazil annually through 2020, twice as much the estimated expansion of the overall beverage market, according to consultancy Euromonitor International.

REFORMULATIONS

Coca-Cola has over 200 reformulation initiatives underway to cut the sugar content of existing products, Chief Operating Officer James Quincey said last week. Ambev, which is controlled by Anheuser Busch Inbev SA, the world's biggest beer producer, is also adding water, iced tea and other low-sugar drinks as beer sales have flagged in Brazil in recent years.

In April, Ambev, Latin America's largest beverage maker, paid an undisclosed price for Do Bem SA Industria & Comercio, another Brazilian juice maker catering to health-minded consumers.

Last year, U.K.-based Britvic purchased Empresa Brasileira de Bebidas e Alimentos SA, which owns the 60-year-old Maguary brand, for 580 million reais ($179 million).

Those moves are not recent, but have been gathering steam in recent years. Atlanta-based Coca-Cola and Monterrey, Mexico-based Fomento Económico Mexicano SAB (>> Coca-Cola FEMSA, S.A.B. de C.V.) bought Mexico's Jugos Del Valle for $470 million ten years ago.

($1 = 3.2408 reais)

(Editing by Guillermo Parra-Bernal and Chizu Nomiyama)

By Tatiana Bautzer