How
to Prepare for a Health Check-Up in Bali: Fasting, Timing and What to
Bring
Short answer: To prepare for a health check-up in
Bali, fast for 8 to 12 hours beforehand if blood sugar or a lipid panel
is included (water is fine, and usually so are essential medications —
confirm with your doctor), book a morning slot, stay well hydrated,
avoid alcohol and strenuous exercise for 24 hours, keep taking
prescribed medicines unless told otherwise, and bring your passport or
ID, a list of your medications, and any previous test results. A little
preparation is the difference between clean, reliable results and a
repeat visit.
A good check-up is only as good as the sample it is built on. Small,
avoidable things — a coffee with milk, a hard gym session the night
before, or forgetting your medication list — can nudge results out of
range and cloud the picture. As a preventive-medicine doctor, I would
much rather spend two minutes helping you prepare than have you drive
back for a second blood draw. This guide walks through everything an
expat in Bali needs to do before screening day.
Fasting: who needs to and
for how long
Fasting is the preparation step people worry about most, and the
rules are simpler than they seem.
- Blood glucose and lipid (cholesterol) panels
usually require a fast of 8 to 12 hours. That means no
food and no drinks other than plain water. The overnight window is why
morning appointments are so convenient. - Water is not only allowed but encouraged — staying
hydrated makes the blood draw easier and does not affect results. - Many other tests do not require fasting at all — a
full blood count, thyroid function, kidney and liver panels, and vitamin
levels are generally fine either way.
Because tests are often bundled, the safest approach is to fast for a
combined panel and then eat straight after your blood draw. If you are
unsure whether your specific screen needs fasting, ask when you book —
it is a standard question. Reputable clinical references such as MedlinePlus,
the US National Library of Medicine’s consumer health service, confirm
the standard 8-to-12-hour window and that water and most regular
medicines are usually fine. You can see which panels typically need a
fast in our blood tests and biomarker
panels guide.
Timing: why morning wins
Morning appointments are ideal for several reasons. You complete the
overnight fast comfortably while asleep, some hormones (like cortisol
and testosterone) are naturally higher and more consistently measured in
the morning, and you can eat and get on with your day immediately
afterwards. Booking early also means shorter waits and a calmer, less
rushed visit.
Medications: keep taking
them (usually)
This is a common source of anxiety, so let me be clear: do
not stop your regular prescription medications for a check-up unless a
doctor specifically tells you to. Blood-pressure tablets,
thyroid medication and most others should be taken as normal, even
during a fast — a sip of water to swallow them is fine. Some situations
are exceptions (for example, certain diabetes medications during a
prolonged fast, or supplements like biotin that can interfere with
specific assays), which is exactly why you confirm with the clinician
beforehand. Bring the medicines or a written list so the team knows
precisely what you take and at what dose.
The 24 hours before
To get results that reflect your true baseline rather than a one-off
blip:
- Avoid alcohol for at least 24 hours. Alcohol
affects liver enzymes, triglycerides and blood sugar. - Skip strenuous exercise the day before, as intense
workouts can temporarily raise certain muscle and liver markers. - Eat normally in the days leading up (a crash diet
or feast the night before distorts the picture). - Sleep well — one exhausted, sleepless night can
nudge blood pressure and stress markers. - Hydrate with water throughout the day before and on
the morning of your visit.
What to bring
Turning up prepared makes your visit smooth and your records
complete:
- Passport or KITAS/ID for identification and
record-keeping. - A list of your current medications and supplements,
with doses. - Previous test results or medical records,
especially anything from your home country — these give the doctor a
baseline to compare against, which matters enormously for interpreting
your numbers. - Your glasses or reading glasses if vision testing
is included. - A note of your questions and any symptoms — the
consultation is your chance to raise them, and it is easy to forget in
the moment. - A snack to eat immediately after your fasting blood
draw.
Wear comfortable clothing with sleeves that roll up easily. If
imaging such as an ECG or ultrasound is part of your screen, loose
clothing helps.
A calm mindset helps too
Screening can feel loaded — a small part of you dreads bad news. It
helps to reframe: the entire point of a preventive check-up is to catch
things while they are still easy to address. Most results are
reassuring, and the ones that are not are far better found now than
later. Arriving relaxed also gives a more accurate blood-pressure
reading, so give yourself a few unhurried minutes in the waiting area
before your appointment. For the bigger picture of what a screen
involves and why, see our preventive health screening in
Bali overview.
Medical disclaimer
This article is for general educational purposes only and does not
replace personalised advice from your own physician. Fasting
requirements, medication instructions and preparation steps vary by
individual and by the specific tests ordered. Never stop or alter
prescribed medication without medical guidance. Always follow the
specific instructions given to you by the clinic or doctor arranging
your screening.
Plan your screening
Preparation is easy once you know the rules, and a good concierge
will confirm exactly what your particular screen requires before the
day. To arrange a well-organised, English-speaking health check-up in
Bali — with clear fasting and preparation instructions sent in advance —
talk to our concierge team or message the JHG
Medical Concierge on WhatsApp at wa.me/6281139414563. You can also
explore our full preventive approach on the Bali Health
Checkup homepage. A few small steps beforehand mean results you can
actually trust.