Are Western Blood Test Reference Ranges Accurate for Filipinos?

Quick answer

Most reference ranges work fine for Filipinos. But a few do not. Body weight, waist size, LDL goals, hemoglobin, and creatinine all have lower cutoffs. Those cutoffs were built for Asian bodies, and they fit Filipinos better. Using the Western numbers instead can make your heart and metabolic risk look lower than it really is.

Why your background affects reference ranges

Three things create this gap.

1. Body makeup differs. Filipinos tend to carry more fat around their organs at a lower body weight than White adults do. So the same score on the body mass index, or BMI, can mean a different health risk.
2. Genes play a role too. Genes affect how your body stores fat. They affect how it handles alcohol and cholesterol too. These genes vary across groups. That can shift disease risk even at the same test result.
3. Many ranges were never re-checked. Most ranges came from Western study groups. Doctors here often use them without re-testing them on Filipino patients first.

Where Western ranges hide risk in Filipinos

Body mass index (BMI)

The World Health Organization, or WHO, sets "overweight" at a BMI of 25 or above. It sets "obese" at 30 or above. Those cutoffs hide risk in Filipinos. WHO also publishes lower ones for Asian bodies:

• Overweight: BMI of 23 or above.
• Obese: BMI of 27.5 or above.

A Filipino adult with a BMI of 24 can carry a health risk close to a White adult with a BMI of 26. Most yearly physical exams in the Philippines still use the higher WHO cutoff, not the lower one.

Waist size

The International Diabetes Federation uses its own cutoffs for Asian bodies. Filipinos fall under them.

• Men: waist above 90 cm. (White men: above 102 cm.)
• Women: waist above 80 cm. (White women: above 88 cm.)

Fat stored around your organs drives most of your metabolic risk. Waist size predicts this better than BMI does.

LDL cholesterol goals

Heart problems can start at lower LDL levels in Filipinos. So many heart groups here now set stricter LDL goals. Some aim for under 100 mg/dL at moderate risk. Some aim for under 70 mg/dL at high risk.

Diabetes screening by body weight

US guidelines suggest diabetes screening at a BMI of 25 for most people. For adults of Asian background, they suggest starting at 23. That lower cutoff catches "lean diabetes." That is when a person gets diabetes without much extra weight. It shows up often in Filipino adults.

Hemoglobin

WHO anemia cutoffs fit Filipinos well. These are hemoglobin under 13 g/dL for men. For women, it is under 12 g/dL. But the usual cutoff for low ferritin may be set too low. Many doctors aim for ferritin above 50 ng/mL for everyone.

Where Western ranges work fine

Some markers look the same in Filipinos and in Western groups.

• Glucose, HbA1c, and insulin. The cutoffs used to diagnose disease are the same worldwide.
• TSH, Free T3, and Free T4. The healthy target ranges apply broadly.
• Liver enzymes (ALT, AST, GGT). Differences between labs are small.
• Electrolytes. The same biology applies to everyone.
• Vitamin D and B12. The cutoffs are the same worldwide. Low levels are just more common in the Philippines, mostly from indoor work.

Where the science is still moving

A few markers may need a stricter cutoff for Filipinos. Experts have not agreed yet.

• ApoB. Studies in Asian groups point to a stricter cutoff. Filipinos are part of that group. Heart disease can start earlier. But the exact number is still under study.
• Uric acid. Filipinos tend to run higher uric acid levels than Western groups. Gout is more common too. Whether the action cutoff should be lower is still being studied.
• Triglycerides. Rice-heavy meals are common in Filipino homes, and that supports a stricter target. This has not been fully settled either.

What this means for your own results

Keep three things in mind.

1. Treat a BMI of 23 to 24 as an early warning. Do not read it as "almost overweight." Look at it along with your waist size and other biomarkers.
2. Aim for the stricter LDL goal. This matters most if you have any other heart risk factors.
3. Do not feel reassured by a "normal" result at the high end of the range. The gap between normal and optimal matters even more for Filipinos. See our related guide below to learn why.

How a &you Labs report handles this

A &you Labs report flags the results where a stricter cutoff fits Filipino readers better. The healthy target range shown next to each result reflects those tighter numbers where they apply. Every report also comes with notes from a doctor. Those notes help when a standard range does not fit you well.

Frequently asked questions

Do labs in the Philippines use the stricter ranges?

Some medical groups here have taken up the lower cutoffs. These cover body weight, waist size, and diabetes screening. How often private labs use them day to day still varies.

Does my family background matter for these ranges?

The best evidence covers Southeast Asian groups as a whole. Filipinos sit inside that group. Some gaps show up inside it too. South Asians, for example, tend to get heart disease even earlier. But those gaps are smaller than the overall gap with Western data.

Should I ignore the standard reference range on my lab report?

No. Use both ranges together. The standard range tells you if you have a disease right now. The stricter target range tells you if you are heading in a healthy direction.

Are blood test ranges different for kids?

Yes. Ranges for kids depend on age and sex. Many were tested in Asian children too. This article covers adults only.

Where do the stricter ranges come from?

They come from published research. They also come from guides set by medical groups in this part of the world. As new research comes out, some cutoffs may still change.

Key takeaways

• Most lab reference ranges were first built using Western study groups.
• Body weight, waist size, LDL goals, and diabetes screening all have lower cutoffs. Those catch risk in Filipinos earlier.
• Glucose, HbA1c, thyroid markers, electrolytes, and most nutrients line up with the Western ranges.
• Use the standard range to check for active disease. Use the stricter target range to watch your long-term trend.