Five years of ME/CFS fatigue, improved on vitamin D3 and iron, then energy tanked again
- Condition
- ME/CFS
- At worst
- Mild (working or studying, with limits)
- Ill before improving or writing
- 5 years
- Last post
- Jul 2026
In their words
- Condition: ME/CFS
r/chronicfatigue
In context ↗ - At worst: Mild
I am back to being exhausted all the time, and wanting to sleep and stay in bed all day.
In context ↗ - Now: Relapsed
I finished the D3 last week and have already noticed a decline in my energy levels. ... I am back to being exhausted all the time
In context ↗ - Began after: nothing they could name
I don't know the root cause and neither does my doctor
Read from 1 of their posts and comments; links to the one this page draws on
Summary
Island 69684 has had unexplained fatigue for about five years, with normal thyroid labs. A doctor found deficiencies and prescribed weekly vitamin D3 for eight weeks and alternate-day ferrous sulfate; both helped immensely, D3 within a week and iron two days later. After finishing the D3, energy tanked again and they were exhausted all the time, though dizziness and blood pressure drops were fewer on iron.
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What they tried
Their words about each treatment
- D3 · Helped a lot
They have helped immensely. I started feeling the difference about a week in with the D3
In context ↗ - Ferrous Sulfate EC · Helped a lot
They have helped immensely. ... about two days later with the iron
In context ↗
Approaches: Supplements
Their path
What they say at each step doesn’t fit the worst point or outcome above on the severity scale, so the steps are listed as they describe them. Dates are when they posted.
| When | What happened | After |
|---|---|---|
| about 2021 | unexplained fatigue beganthe amount of fatigue I feel/was feeling was not normalIn context ↗ | |
| mid-2026 | vitamin D3 and iron supplements helped immenselyThey have helped immensely.In context ↗ | Vitamin D and sun exposure |
| July 2026 | energy tanked after finishing the D3 coursewith the end of the D3 my energy has tanked once moreIn context ↗ | |
| 2026-07-24 | exhausted all the time, wanting to stay in bedI am back to being exhausted all the time, and wanting to sleep and stay in bed all day.In context ↗ |
Symptoms mentioned
Their words about their symptoms
- POTS & dysautonomia
I'm not getting as many of the sudden dizziness and BP drops I was before the iron supplements
In context ↗
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