For this achievement OJ will be your best friend, I also recomend grabbing the magazine from Stans Large Print Bookstore in Palisades mall that gives u plus 50% on all consumable items, or health book 2 found on top of a refridgerator in Hungry Joes pizzeria in the food court, that gives 100% on consumables.(thanks for the reminder timerider42)
***THIS IS BEST DONE SOLO, dont join anyones game or except any invites to your game, it is best to set ur game type to private to avoid any issues, dont even touch sandbox mode till your done with this cheeve. (thx to Robster80 for his tips).
*Avoid any alcohol, this includes cocktails,wine,vodka etc, but mixing 2 alcoholic drinks into a blender to get a juice will not affect this cheeve.
*Avoid any dairy, milk,cheese, ice creams,cookies, coffee creamers etc,if your not sure,best advice is leave it.
*Avoid meat,steaks,ribs etc, to be safe avoid anything that may contain meat, like pizzas and hamburgers etc.
This still leaves alot of items to consume snacks and fruit etc, but as i mentioned before OJ is ur best bet, or mixing juices in blenders.
One bit to watch is the fight with the twins in Shoal Nightclub (Located in the Yucatan casino), make sure to take at least 3 OJ's or juices,as u are locked in the room with them and the only consumables r alcoholic except for a pinnapple which is only good for 2-3 squares of health,and some jelly beans worth 1-2 squares of health.
As soon as the millitary arrives the cheeve will pop.
OJ's can be found in the pharmacy in Royal Flush Plaza, in the back room, Another good spot is Chris' Fine Foods upstairs in Palisades Mall.
Keep an eye out for blenders in kitchens, hard to notice if u dont know what ur looking for, they are found all thruout the game,
** If u eat or drink something wrong or your not sure about, restart from a checkpoint or save and ur still safe for the achievement **
Americana Casino - Shots & Awe
Platinum Strip - Juggz Bar and Grill
Food Court - Rojo Diablo mexican restauraunt
Atlantic Casino - Sipparellos
Silver Strip - Pub O' Gold
Yucatan Casino - Barron von Brathus
Palisades Mall - Grotto Bar (1st floor)
Slot Ranch Casino - the bar
Uranus Zone - Bottom bar of the lounge area, directly left as you enter through the alien head entry