Is RBC 6.75 and Hemoglobin 17.19 normal for a 21-year-old?
Yes — in most healthy young men, these values can be normal, depending on height, body build, and hydration status.
Normal RBC count for adult males:
4.5 – 6.0 million/µL
Your son: 6.75 → Slightly higher, not dangerous
Normal Hemoglobin for adult males:
13.5 – 17.5 g/dL
Your son: 17.19 → Upper normal range
So his hemoglobin is at the higher end but still within the accepted normal range for men.
Common causes of mildly high hemoglobin/RBC in healthy young males
These are not harmful:
– Naturally higher levels in young adult males
– Athletic build or exercise
– Living in hot climate (mild dehydration increases Hb/RBC temporarily)
– High-protein diet
– Mild dehydration on the day of test
– Genetics (family pattern)
These do not require treatment.
Next Steps
When do we investigate further?
Only if:
• Hemoglobin >18.5
• Hematocrit (PCV) >52%
• Symptoms like headache, dizziness, redness of face
• History of smoking
• Known lung disease
• Snoring/possible sleep apnea
If none of these are present, no concern.
What you can do next
Just check:
• PCV/Hematocrit value (in the same CBC)
• Repeat CBC after proper hydration in 2–3 weeks, if you want confirmation.
Most of the time, numbers come slightly down after hydration.
Health Tips
Your son’s hemoglobin and RBC count are on the higher side but still within the normal range for adult males. This is usually normal at his age and not dangerous. No treatment is needed unless values continue rising or he has symptoms.