Do I really need to fast before getting tests for vitamin B12, vitamin D, CBC, and thyroid? I was told to get these because I'm dealing with hair fall, but I'm not sure if fasting is necessary. Can you clarify this for me?

Answered by 1 Apollo Doctors

Dr Anshul Maheshwari

General Practitioner

MBBS
5+ Yrs

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The needle-like stomach pain could be due to gas, acid reflux, food poisoning, or stress. To alleviate the discomfort:

Self-Care

Stay hydrated: Drink plenty of water.

Avoid triggers: Steer clear of spicy, fatty, or heavy foods.

Over-the-counter relief: Try antacids or acid reducers like Tums, Rolaids, or Zantac.

When to Seek Medical Attention

Severe pain: Unbearable or worsening pain.

Vomiting: Vomiting blood or severe vomiting.

Fever: High fever (over 101.5F).

Abdominal tenderness: Stomach tenderness to the touch.

Dr. Anshul Suggests...

Consult a Dermatologist

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Answered 04/07/2025

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For your tests related to hair fall, here are some key points to know about fasting requirements:

Vitamin B12 and Vitamin D tests: Generally, you do not need to fast before these blood tests. They can be done at any time of the day.
Complete Blood Count (CBC): No fasting is required for a CBC test.
Thyroid function tests: These also do not require fasting.

It's always a good idea to follow any specific instructions given by your healthcare provider or the lab. If you are taking any medications or supplements, mention them before the test.

If you have any other concerns or symptoms, discussing them with your doctor will help tailor the testing and treatment plan effectively.

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I'm really concerned about a possible connection between the medication I've been taking, Saaz DS, and developing allergies. Recently, I've noticed symptoms that remind me of ringworm, and it's making me anxious. I've been on Saaz DS 1g twice daily for about a year now. Could there be a link, and should I be worried?

Saaz DS (Sulfasalazine) is not typically used to treat allergies or ringworm. It is commonly prescribed for conditions like rheumatoid arthritis and ulcerative colitis. If you are experiencing symptoms of allergies or ringworm, it is best to consult with a healthcare provider for proper evaluation and treatment.