TSH Level Analyzer (Normal Range by Age)

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TSH Level Analyzer: Your Complete Guide to Understanding Thyroid Health

What is TSH and Why Does It Matter?

Thyroid-Stimulating Hormone (TSH) is a pituitary gland hormone that regulates thyroid function. Maintaining optimal TSH levels is critical for:

1. Metabolism regulation

2. Body temperature control

3. Energy production

4. Cognitive function

5. Cardiovascular health

Our TSH Level Analyzer helps decode your test results using age-specific reference ranges approved by endocrine societies.

Normal TSH Levels by Age: Key Reference Ranges

Age GroupNormal TSH Range (mIU/L)Newborns (0-4 days)1.6 - 24.3Infants (2-20 weeks)0.58 - 5.57Children (20 weeks-20 yrs)0.55 - 5.31Adults (21-54 yrs)0.40 - 4.20Seniors (55+ yrs)0.50 - 8.90

How Our TSH Level Analyzer Works

Input Parameters Explained

1. Age

   • Critical for selecting age-appropriate reference ranges

2. Gender

   • Accounts for hormonal variations (females have 5-8x higher thyroid disorder risk)

3. TSH Value

   • Accepts both mIU/L and μIU/mL units (1:1 conversion)

Advanced Analysis Algorithm

The tool evaluates:

• Subclinical Conditions: Detects borderline high/low values

• Critical Thresholds: Flags results needing immediate medical attention

• Trend Visualization: Color-coded risk meter positions your result within the normal spectrum

Interpreting Your TSH Results

Result Categories

1. Normal Range (Green)

   • 0.4-4.2 mIU/L for most adults

   • No immediate action needed

2. Borderline Low (Yellow)

   • 0.1-0.39 mIU/L

   • Possible hyperthyroidism precursor

3. Critically Low (Red)

   • <0.1 mIU/L

   • Likely hyperthyroidism

4. Borderline High (Yellow)

   • 4.3-10 mIU/L

   • Potential hypothyroidism

5. Critically High (Red)

   • 10 mIU/L

   • Probable thyroid failure

When Should You Get Tested?

The American Thyroid Association recommends TSH testing if you experience:

• Unexplained weight changes

• Chronic fatigue

• Hair loss

• Temperature sensitivity

• Menstrual irregularities

• Cardiac arrhythmias

Pro Tip: Test at the same time daily – TSH levels fluctuate by up to 50% throughout the day!

Limitations of TSH Testing

While our analyzer provides expert-level analysis, remember:

1. Pregnancy alters normal ranges (lower thresholds)

2. Acute illness can temporarily suppress TSH

3. 5% of healthy adults fall outside standard ranges

4. Always consult an endocrinologist for diagnosis

Frequently Asked Questions

Q: Can normal TSH still mean thyroid disease?
A: Yes – always check Free T4 and T3 levels for complete assessment.

Q: How often should seniors test TSH?
A: Annual testing recommended after age 60 due to increased hypothyroidism risk.

Q: Which unit is better – mIU/L or μIU/mL?
A: They’re equivalent (1 mIU/L = 1 μIU/mL) – no conversion needed!