Real ChatGPT answer · index seedItOx5cLrtA4completeHealth and wellness · supplements and vitaminscomparison

What is the difference between vitamin D2 and D3 for treating winter fatigue and does it really matter which one I buy at the pharmacy

ChatGPTgpt-62 queries10/31/2026
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The searches the AI actually ran for this prompt.

SEED QUERY
What is the difference between vitamin D2 and D3 for treating winter fatigue and does it really matter which one I buy at the pharmacy
2 real searches · 1 real-search pass
vitamin D2 versus D3 efficacy raising serum 25-hydroxyvitamin D fatigue deficiency evidence NIH fact sheet adultsGoogle ↗
OBSERVED
vitamin D supplementation fatigue randomized trial deficiency guideline safe upper limit adults NIH ODSGoogle ↗
OBSERVED

Badge and edge weight = share of passes that produced the query. Hover a query for its intent and routing format.

Query classes

Google's semantic query class for every sub-query: what kind of answer each search is after, simulated vs real.

Classifying 2 queries…

Searches and sources

ChatGPT2 real searches · gpt-6
vitamin D2 versus D3 efficacy raising serum 25-hydroxyvitamin D fatigue deficiency evidence NIH fact sheet adults Google ↗
vitamin D supplementation fatigue randomized trial deficiency guideline safe upper limit adults NIH ODS Google ↗
  1. Vitamin D · ods.od.nih.gov
  2. Vitamin D: MedlinePlus · medlineplus.gov
  3. Vitamin D · ods.od.nih.gov

Queries

2 queries · click a column to sort
Query / typeSearchIntentQuery classRouting formatClusterFreq ↓Weight
vitamin D2 versus D3 efficacy raising serum 25-hydroxyvitamin D fatigue deficiency evidence NIH fact sheet adults
OBSERVED
Google ↗
AI Mode ↗
————1x
of 1
vitamin D supplementation fatigue randomized trial deficiency guideline safe upper limit adults NIH ODS
OBSERVED
Google ↗
AI Mode ↗
————1x
of 1