You can't completely bulletproof yourself against Bali Belly. Anyone who tells you otherwise is selling something. But you can stack the odds heavily in your favour, and most of it comes down to a handful of simple habits that take almost no effort once you know them.

This is the practical playbook: what to actually do before you go and once you're there to give yourself the best possible shot at a holiday that isn't interrupted by your stomach.

Can You Actually Prevent Bali Belly?

Let's be straight: there's no guaranteed way to avoid it. Even careful, experienced travellers occasionally get caught out, because so much of it comes down to your gut meeting an unfamiliar environment. (If you want the full picture of why it happens, that's covered in our guide to what causes Bali Belly.)

What you can do is genuinely reduce your risk. Think of the steps below as a stack: no single one is a force field, but together they make a real difference.

Before You Go

Prevention starts before you've even packed.

•       Pack oral rehydration sachets. If something does happen, you'll want them, and they're the most useful thing in any travel kit.

•       Sort travel insurance and keep the details handy.

•       Try to arrive reasonably rested. A run-down, sleep-deprived body copes worse with everything, including new bacteria.

•       If you like to take a probiotic as part of your prep, start it a few days before you fly so it's already part of your routine by the time you land. More on that below.

Water: The Golden Rules

Water is one of the easiest things to get right, and one of the most common ways people slip up.

•       Stick to bottled or filtered water for drinking.

•       Use it for brushing your teeth too. It's an easy habit to forget on the first morning.

•       Try not to swallow water in the shower.

•       Be a little cautious with ice at smaller, local spots. Many established venues use commercially produced ice that's generally considered safe, so this is about being sensible, not paranoid.

Food: How to Eat Smart Without Missing Out

The goal here isn't to live on plain rice and miss the best part of Bali. It's to make slightly smarter choices.

•       Favour busy venues with high turnover. Fast-moving food tends to be fresher.

•       Hot, freshly cooked food that arrives steaming is generally a safer bet than something that's been sitting out.

•       Be a bit more cautious with raw salads and pre-cut fruit, which may have been washed in tap water. Fruit you peel yourself is a safer option.

•       Approach buffets that have been sitting under warmers for a while with some caution.

And no, you don't have to avoid street food on principle. A busy warung cooking fresh to order can be a great choice. It's more about freshness and turnover than fancy versus simple.

Your First 48 Hours Matter Most

This is the bit people most often get wrong. You land, you're excited, and within hours you've had cocktails, a spicy curry, and three things you'd never eat at home.

Your gut hasn't caught up yet. Give it a chance:

•       Ease into alcohol rather than going hard on night one.

•       Go gently with very spicy and very rich food for the first day or two.

•       Keep your fluids up, especially in the heat.

A slightly slower start often pays off for the whole trip.

Wash Your Hands (Properly, and Often)

Unglamorous, but it genuinely works. Wash or sanitise before eating, after handling cash, and after public transport or scooter rides. Keep a small hand sanitiser on you for the times a sink isn't around.

Look After Your Body in General

Your gut doesn't operate in isolation. Heat, dehydration, poor sleep, and heavy drinking all put your body under strain, and a stressed body copes less well with unfamiliar bacteria. Staying hydrated, getting some sleep, and not overdoing the alcohol every single night all quietly help.

Where a Probiotic Fits Into Prevention

Some travellers like to include a probiotic in their prep to support their gut before and during a trip. It's worth being clear about what that can and can't do: no probiotic can guarantee you won't get sick, and it's not a substitute for the water, food and hygiene habits above.

If you do choose one, a shelf-stable strain that survives heat and travel is the practical pick. Saccharomyces boulardii, the strain Bali Ease is built around, has become popular with travellers for exactly that reason. The sensible way to use it is as one part of the broader prevention stack, started a few days before you fly and continued through the trip, not as a magic shield that lets you ignore everything else.

Your Simple Pre-Trip Checklist

If you remember nothing else, remember this:

•       Bottled or filtered water only, including for teeth

•       Hot, fresh, busy-venue food

•       Easy on alcohol and rich food for the first 48 hours

•       Wash and sanitise hands often

•       Stay hydrated and reasonably rested

•       Pack rehydration sachets just in case

•       Consider a probiotic as part of your prep if that's your thing

The Bottom Line

You can't eliminate the risk of Bali Belly entirely, but you can shift the odds a long way in your favour. Smart water and food choices, an easier first couple of days, good hand hygiene, and looking after your body generally do most of the work. Get those right and you give yourself the best possible chance of spending your trip enjoying Bali rather than recovering from it.

Frequently Asked Questions

Can you completely prevent Bali Belly?

No. There's no guaranteed way to avoid it, since a lot comes down to your gut adjusting to an unfamiliar environment. You can meaningfully reduce your risk with sensible water, food and hygiene habits, but no approach is foolproof.

Do probiotics prevent Bali Belly?

No probiotic can guarantee prevention. Some travellers use one as part of their preparation to support gut health, but it works best alongside careful food and water choices, not instead of them.

Is it safe to eat street food in Bali?

It can be. Busy stalls cooking fresh to order are often a good choice. The key factors are freshness and turnover rather than street food versus restaurant, so look for hot, freshly prepared food wherever you eat.

Should I avoid ice in Bali?

You don't need to avoid it everywhere. Many established venues use commercially produced ice that's generally considered safe. Being a little more cautious at smaller, local spots is a reasonable middle ground.

How far in advance should I start preparing?

A few days before you fly is a common approach, particularly if you're starting a probiotic and want it to be part of your routine before you land. The water, food and hygiene habits simply start the moment you arrive.