If you have a thyroid blood test coming up, a little preparation can help get the most accurate results. Here’s what you should know:
1. Food and Drink:
- Eat light meals the day before — avoid anything too oily, heavy, or spicy.
- If your doctor asks for a fasting test (like TSH levels), don’t eat anything for 8–10 hours before your appointment. You can drink plain water.
- Avoid coffee, tea, and caffeine before the test, especially in the morning. Even black coffee can affect results.
2. Medications:
- If you’re already on thyroid medication (like levothyroxine), ask your doctor if you should skip it before the test. Some tests need you to take it after blood is drawn.
- Bring a list of all medicines and supplements you’re taking — some can influence thyroid levels.
3. What to Avoid:
- No smoking or alcohol for at least 24 hours before the test.
- Try to avoid extreme physical activity or stress — both can slightly mess with your thyroid numbers.
4. What to Eat Before (if allowed):
- Light breakfast if fasting isn’t required — fruits, plain toast, or a small portion of oatmeal are safe choices.
- Drink water normally to stay hydrated, but don’t overdo it.
5. Sleep Matters:
- Get a good night’s sleep before the test. Fatigue and stress can sometimes affect hormone levels.
Quick Reminder:
Always follow the specific instructions your doctor gives. Some tests might have special guidelines depending on what exactly they’re checking (TSH, T3, T4, thyroid antibodies, etc.).
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