The Spaniard’s meticulous eye for detail has led to him banning non-freshly squeezed juices from the club’s London Colney training base.
Instead, Emery wants the team to follow his lead and drink a healthier alternative as his quest to overhaul the fortunes of the club continues.
They face a trip to promoted Cardiff on Sunday, with Emery explaining why he took such tight measures in his preparation.
“Yes, this is true,” he said when asked about the ban.
“I only changed, I like fruit a lot and I like fruit juice. But with a lot of sugar? Not very good.
“It’s for that and when I was very young, my father was coming every day with one fresh orange fruit juice.
“I like it in my life, more of that. It’s for that, when I arrived here, I asked only for that from the cook. And the players, I think, are the same. They prefer their orange juice fresh.”
Arsenal won just three Premier League away games in Arsene Wenger’s final season before he was replaced by Emery in the summer.
Mesut Ozil, who missed the win over West Ham through injury, is fit to return at the Cardiff City Stadium.
“He’s training normally with the group, in every session this week,” Emery said.
“We started on Tuesday and every day he has been training with the group. He’s OK. Also I’m looking at him well every day.”
Arsenal discovered their Europa League fate moments before Emery’s press conference to preview the Cardiff game.
Last season’s beaten semi-finalists face a daunting programme having been drawn alongside Sporting Lisbon as well as Qarabag of Azerbaijan and Ukrainian Premier League outfit Vorskla.
“First it’s three teams and we’ll have the recipe for them,” said Emery, who lifted the Europa League title three times at Sevilla.
“After this, we want to go far in this competition. Each match is different and each match involves a lot of travel.
“For some, the travel is very long but it’s like that. The adaptation for these three teams needs to be positive and we need to face them with ambition and our interest to do well in the competition.”
Emery confirmed Reiss Nelson is set to join German side Hoffenheim on loan for the remainder of the season, although he has also signed a new long-term Arsenal deal.
Manchester United will be without injured duo Sergio Romero and Diogo Dalot for the Premier League trip to Burnley.
Dalot is recovering from a knee operation and Romero has been out with his own knee problem but both were expected to face Stoke in and under-23s match on Friday night.
Marcos Rojo is edging closer to a first-team return but Phil Jones will miss the trip to face Burnley.
Provisional squad: De Gea, Herrera, Smalling, Lindelof, Valencia, Pogba, Matic, Fellaini, Fred, Shaw, Lingard, Lukaku, Sanchez, Rashford, Grant, Young, McTominay.
Premier League clubs will complete their fourth round of fixtures this weekend before the first international break of the season.
Here, we look at five talking points from this week’s top-flight matches.
Mourinho must halt United’s slide
A third straight defeat in his side’s first four matches would have appeared implausible, but that is a prospect Jose Mourinho‘s troubled side face at Burnley on Sunday.
Manchester United could already be staring at a nine-point gap between them and the Premier League leaders when they head to Turf Moor and another poor result will drive speculation over the ‘Special One’s’ future into fever pitch.
Can Reds maintain their flawless start?
Liverpool can steal a march on their rivals by moving three points clear at the top of the table with victory at Leicester in Saturday’s lunch-time kick-off.
Jurgen Klopp‘s side, one of four aiming to extend their 100 per cent start, have yet to concede a goal, while striker Sadio Mane is gunning for his fourth in as many games. Leicester have won two of their first three and should give the Reds their toughest test yet.
Spurs out to draw Hornets’ sting
Watford’s maximum haul from their first three games has caught most by surprise and they will raise a few more eyebrows on Sunday if they become the first to topple Tottenham this season.
Mauricio Pochettino‘s side are chasing their fourth straight win after dismantling United last week and will be brimming with confidence for what promises to be an intriguing encounter at Vicarage Road.
Blues bid for revenge
Chelsea bid to extend their winning start at unbeaten Bournemouth and have a score to settle with the south-coast club. Eddie Howe’s side secured one of their best Premier League results, winning 3-0 on their previous visit to Stamford Bridge in January.
Pellegrini pulls no punches
Manuel Pellegrini has sought to give his players a much-needed jolt by declaring West Ham’s home clash with newly-promoted Wolves as a must-win game.
The rock-bottom Hammers are the only top-flight club yet to register a point after three straight defeats and former Manchester City boss Pellegrini can ill-afford another home defeat in his bid to win over the fans.