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Selenium

398 people describe trying Selenium (138 with ME/CFS, 260 with long COVID). Of the 269 who said how it went, 220 say it helped, often with one symptom, and 10 got worse. 155 credit it as one reason they got better overall.

Everyone · 398 people

All 398 who tried it

How it went for everyone who tried it

Helped means they said it helped with what they took it for, which may be one symptom and not the illness.

82%
helped
220 of 269
14%
no change
39 of 269
4%
got worse
10 of 269

Shares are out of the 269 people who said how it went. 129 more tried it without saying how it went overall; 3 of them describe a problem.

Show as a table
How it wentPeopleShare
Helped a lot145%
Helped20677%
No change3914%
Worse83%
Much worse21%
Where it was reportedHelpedSaid how it went
Reddit206255
Recovery stories1414

Did it last, for everyone it helped?

  • It wore off for 15 of the 220 people it helped: 8 who credit it for their improvement, 7 who don’t.

Read from what people wrote, and the more someone wrote, the more likely they are to mention it. Some people stop posting before saying, so the real number may be higher.

Everyone · 155 people

155 who credit it

Among the 155 who credit it with their improvement, here’s how they are now

Credit it means they say it’s one reason they got better: 17 say it helped them most; 138 say it was one of several things that helped.

32%
recovered or near normal
49 of 155
53%
much or somewhat better
82 of 155
15%
relapsed
24 of 155

Where each person was at the end of their story, or in their latest post that says how they are, compared with their worst point.

Show as a table
Outcome describedPeopleShare
Recovered149%
Near normal3523%
Much better4630%
Somewhat better3623%
Relapsed2415%

Did it last?

  • 8 of the 155 who credit it said its benefit wore off (5 of them among the 24 who relapsed).
  • 82 of the 155 who credit it say they still need to keep doing something (not always this) to stay well.
155 who credit it

By how ill people were

Only the 155 who credit it, so people it didn’t help or made worse aren’t here. How they are now is their outcome overall, not the effect of this one treatment.

Severity at worstHow they are nownRecovered or near normal
Mild3845%
Moderate3534%
Severe5420%
Very severe540%, few people
Not stated2331%
Show as a table
At worstOutcomePeopleShare
MildRecovered5 of 3813%
MildNear normal12 of 3832%
MildMuch better2 of 385%
MildSomewhat better13 of 3834%
MildRelapsed6 of 3816%
ModerateRecovered4 of 3511%
ModerateNear normal8 of 3523%
ModerateMuch better13 of 3537%
ModerateSomewhat better6 of 3517%
ModerateRelapsed4 of 3512%
SevereRecovered3 of 545%
SevereNear normal8 of 5415%
SevereMuch better22 of 5441%
SevereSomewhat better9 of 5417%
SevereRelapsed12 of 5422%
Very severeRecovered1 of 520%
Very severeNear normal1 of 520%
Very severeMuch better1 of 520%
Very severeSomewhat better1 of 520%
Very severeRelapsed1 of 520%
Not statedRecovered1 of 234%
Not statedNear normal6 of 2327%
Not statedMuch better8 of 2335%
Not statedSomewhat better7 of 2330%
Not statedRelapsed1 of 234%
4 who name it their main treatment and say how long it took

Time to improvement

1 weekmedian time to the first improvement

Among the 4 who name it as their one main treatment and say how long it took (most people don’t, and those who do may not be typical), the first improvement came after 3 days at the quickest and after 1 week at the slowest. Each dot is one person.

Each person’s time4 stories, quickest firstShowHide
  1. 3 daysSelenium working for me · Melissa89
  2. 1 weekME/CFS fatigue since high school; selenium benefit faded · Maple 42526
  3. 1 weekHigh-Dose Selenium Significantly Improves My Fatigue and Brain Fog · jmd82
  4. 1 weekLargely bedbound with ME/CFS, improved on selenium then relapsed after COVID · Beacon 93877

Read from each person’s own timeline and estimated from the dates they give. A story’s time runs from starting its main treatment, so it can’t be split between several. The time line stretches short waits so a few days and a few months both have room.

Adverse events

What people said went wrong, in their own words.

25 of 398

people who wrote about taking it described a problem they tied to it

Described one · 25Didn’t mention one · 373

The serious kinds

Worth telling a doctor about straight away.

  • Made them much worse

    2 people
    “I almost died of selenium poisoning thanks to supplements that were prescribed to me.”
    — Swan 55291
    “so i continued 100-200mcg and it totally fked my health just within 4 weeks of starting it.”
    — Puffin 86305
  • Mood or psychiatric effects

    3 people
    “i took the higher dose and was crazy anxious. I cut that in half”
    — Maple 69325
    “magnesium glycinate causes me bad anxiety”
    — Dune 11712
    Show 1 moreShow fewer
    “selenium supplements make me angry for some reason”
    — Dove 98622

    If you are struggling or having thoughts of harming yourself, please reach out for help: a doctor, a local crisis line or emergency services.

  • Refeeding or deficiency problems

    2 people
    “I took zinc for years and had copper deficiency show up on a cellular nutrient deficiency test.”
    — Maple 37560
    “I also have folate deficiency, it was 0.65 before after selenium it came down to 0.23.”
    — Puffin 86305
  • Blood count problems

    1 person
    “Having my thyroid suddenly start making hormones again made me have anemia symptoms”
    — Dove 98622
  • Heart rhythm problems

    1 person
    “Selenomethionine 100mcg from supplements caused arrhythmias and further heart issues.”
    — Comet 87655

The serious kinds are a death, suicidal thoughts or an attempt, a hospital stay, an ER visit, an allergic reaction or anaphylaxis, heart rhythm, liver or kidney, blood count, mood or psychiatric, or refeeding or deficiency problems, and being made much worse: a large worsening such as a crash lasting weeks or more.

Other kinds

Unpleasant effects people tied to it, the most serious first.

Made symptoms worse · 8Gut side effects · 4Side effects · 10Other · 1 Show all 4Hide
  • Made symptoms worse

    8 people
    “What made me worse: Nattokinase, antihistamines, Selenium, Vit. B1 and Folate”
    — Hill 82091
    “TA1 stimulates the immune system quite a bit and I got a similar reaction to supplementing with selenium.”
    — Sandpiper 53110
    Show 6 moreShow fewer
    “Too much potassium really messes me up”
    — Dew 68600
    “a selenomethionine supplement made my heart worse”
    — Island 16417
    “I think the combination of these nutrients perhaps even made things worse for me.”
    — Meadow 23537
    “so i continued 100-200mcg and it totally fked my health just within 4 weeks of starting it.”
    — Puffin 86305
    “I tried taking Selenium some time back and it made my chest pains immediately worse so I stopped”
    — Glade 81247
    “When I started the selenium I felt immediately worse, because I was so deficient.”
    — Fjord 49666
  • Gut side effects

    4 people
    “I tried a lot of Vitamin C, Selenium and Quercetin which I got from this reddit and those made my digestion worse.”
    — Pebble 25311
    “I've tried a kelp supplement and it gave me severe diarrhea”
    — Island 16417
    Show 2 moreShow fewer
    “my stomach started hurting pretty bad and i pretty much had to live near the bathroom.”
    — Maple 42526
    “within 3 days started having really bad stomach pains and stomach issues.”
    — jmd82
  • Side effects

    10 people
    “I had reactions to all of them except selenium and had to start with very low doses and try different forms.”
    — Pond 26875
    “Copper and the nicotinic acid irritate though!”
    — Horizon 16724
    Show 8 moreShow fewer
    “I did try selenium awhile back though and all it did was give me ear pain.”
    — Lagoon 98904
    “many selenium formulations cause intense headaches for me and titrating dosing did not help”
    — Kestrel 63297
    “Coq10, selenium, yeast, vit E too much of these makes my prostate or bladder crazy”
    — Stone 30737
    “This approach triggered more copper being released from my liver into my blood. I got symptoms of too much copper ... from a LOW copper approach.”
    — Sequoia 53349
    “even 10mg of magnesium would paralyze my body totally, when magnesium used to help me a lot before selenium.”
    — Puffin 86305
    “When I started the selenium, I felt TERRIBLE for a week.”
    — Fjord 49666
    “I noticed some increased fatigue on just the 3 minerals.”
    — Tern 91218
    “I myself for example will get irritability side effects from 800 mcg of selenium”
    — Hip
  • Other

    1 person
    “I almost died of selenium poisoning thanks to supplements that were prescribed to me.”
    — Swan 55291

Only what people tied to this treatment, in their own words, grouped by kind. Some described more than one kind, so the counts by kind add up to 30.

How often it comes up

Posts that mention Selenium, per 1,000 posts each month. Hover or tap a point for the count.

0102030201020142017202020232026
Show as a table
MonthPosts mentioning itAll postsPer 1,000
Oct 200901050
Jan 201001410
Feb 201001130
Jun 201101090
Nov 201111248.1
Dec 201111995.0
Jan 201222328.6
Feb 201201030
Mar 201201900
Apr 201201620
May 201203750
Jun 201202380
Jul 201202400
Aug 201204850
Sep 201205610
Oct 201205260
Nov 201215141.9
Dec 201206990
Jan 201345337.5
Feb 201324474.5
Mar 201314292.3
Apr 201324994.0
May 201306060
Jun 201336094.9
Jul 201316161.6
Aug 201305770
Sep 201303640
Oct 201315361.9
Nov 201313852.6
Dec 201305190
Jan 20143594437.1
Feb 201438213.7
Mar 2014542511.8
Apr 201403610
May 201426173.2
Jun 2014548910.2
Jul 201414442.3
Aug 20141162217.7
Sep 20141550729.6
Oct 201426782.9
Nov 2014856714.1
Dec 201406290
Jan 201547605.3
Feb 201528732.3
Mar 201541,2763.1
Apr 201509840
May 201521,4961.3
Jun 201521,0461.9
Jul 201521,2111.7
Aug 201529982.0
Sep 201511,0600.94
Oct 201501,2550
Nov 201501,2460
Dec 201549244.3
Jan 201601,2820
Feb 201671,0516.7
Mar 201601,0020
Apr 201659985.0
May 201611,0450.96
Jun 201611,2300.81
Jul 201621,6191.2
Aug 201611,7290.58
Sep 201601,7850
Oct 201651,2204.1
Nov 201661,0925.5
Dec 201601,2110
Jan 201741,6602.4
Feb 201751,9882.5
Mar 201722,0780.96
Apr 201702,1330
May 201732,3701.3
Jun 201752,1942.3
Jul 201722,1830.92
Aug 201752,4662.0
Sep 201712,1890.46
Oct 201763,0422.0
Nov 201731,9761.5
Dec 201702,1120
Jan 201822,6200.76
Feb 201852,1552.3
Mar 201862,6132.3
Apr 201822,2510.89
May 201812,8280.35
Jun 201853,8711.3
Jul 201813,0670.33
Aug 201823,7570.53
Sep 201833,5120.85
Oct 201833,2610.92
Nov 201812,8610.35
Dec 201802,7540
Jan 2019103,6722.7
Feb 2019102,7153.7
Mar 201933,3170.90
Apr 201923,1410.64
May 201933,8550.78
Jun 201913,3920.29
Jul 201973,3122.1
Aug 201933,9430.76
Sep 201924,0350.50
Oct 201913,9220.25
Nov 201933,5080.86
Dec 201913,6590.27
Jan 202054,6501.1
Feb 2020104,3742.3
Mar 202024,4750.45
Apr 202023,6900.54
May 202074,5431.5
Jun 202035,7010.53
Jul 202036,1040.49
Aug 20201210,3331.2
Sep 2020011,9580
Oct 2020414,5680.27
Nov 20202916,5461.8
Dec 20204620,7642.2
Jan 20212824,5621.1
Feb 20212524,6721.0
Mar 20213729,4761.3
Apr 20212328,5090.81
May 20212125,7910.81
Jun 20212627,8710.93
Jul 2021927,2200.33
Aug 20211030,8080.32
Sep 20211230,0740.40
Oct 2021822,1320.36
Nov 20211527,7220.54
Dec 20212231,8720.69
Jan 20225142,3171.2
Feb 20223538,6970.90
Mar 20222844,3050.63
Apr 20222244,3330.50
May 20223250,5940.63
Jun 20222649,0580.53
Jul 20222353,4850.43
Aug 20222054,4550.37
Sep 20224356,9360.76
Oct 20223058,5110.51
Nov 20221159,1980.19
Dec 20222561,5760.41
Jan 20232361,0040.38
Feb 20232350,1330.46
Mar 20231459,9250.23
Apr 20234454,2510.81
May 20233557,7680.61
Jun 20232352,6790.44
Jul 20232056,4010.35
Aug 20232765,4350.41
Sep 20233461,8350.55
Oct 20232558,4190.43
Nov 20232753,6620.50
Dec 20234360,6430.71
Jan 20242571,8180.35
Feb 20242670,0450.37
Mar 20242968,2610.42
Apr 20241164,3740.17
May 20242067,6980.30
Jun 20243264,7200.49
Jul 20242265,3350.34
Aug 20243668,5170.53
Sep 20242570,1680.36
Oct 20243272,6070.44
Nov 20242271,8020.31
Dec 20242274,4010.30
Jan 20251877,9090.23
Feb 20252665,1100.40
Mar 20251869,9050.26
Apr 20254761,6060.76
May 20252765,7330.41
Jun 20252860,5400.46
Jul 20253862,1050.61
Aug 20252164,5780.33
Sep 20252561,7040.41
Oct 20252159,2040.35
Nov 20251958,9440.32
Dec 20251362,8300.21
Jan 20262063,3210.32
Feb 20261553,0850.28
Mar 20261759,2080.29
Apr 20261853,9890.33
May 2026957,5410.16
Jun 20261155,3010.20
Jul 20262156,3910.37
Aug 20261156,8250.19
Sep 2026957,1430.16

Forum and Reddit posts, 4,007,898 in all, counted per month. A mention means the post names the treatment, not that the writer took it. All trends

Everyone · 398 people

20 of the 398 people who tried it

See all 398 stories
  • Bedbound with severe ME/CFS, now nearly back to normal on protocol and strict rest

    Near normal Alder 39616 ME/CFS Very severe at worstIll 8.5 years before improving or writing reddit.com Oct 2026

    Bedbound and unable to tolerate light or sound for six of her 8.5 years of severe ME/CFS, she improved gradually over about six years on a personalized biochemical protocol built by her physician husband (minerals, amino acids, phospholipids, mitochondrial…

  • Long COVID brain fog and POTS, somewhat better; phosphatidylcholine helped brain fog

    Somewhat better Breeze 31423 Long COVID reddit.com Oct 2026

    A Reddit user with long COVID described POTS, brain fog, migraines and small fibre neuropathy. Phosphatidylcholine taken several times a day was the only thing that helped their brain fog. B vitamins, magnesium, zinc and selenium also helped, and they called…

  • Housebound or bedbound with long COVID, now much better with rapamycin and rest

    Much better Stone 61523 Long COVID Severe at worstIll 2.5 years before improving or writing reddit.com Oct 2026

    After an acute COVID infection Stone 61523 was housebound or bedbound for many months with headaches, brain fog, heat intolerance, palpitations and PEM. Two six-month courses of rapamycin, with radical rest, pacing and supplements, brought steady gains in…

  • Housebound with ME/CFS for five years, somewhat better after ashwagandha and metformin

    Somewhat better Otter 89615 ME/CFS Severe at worstIll 11 years before improving or writing reddit.com Oct 2026

    A Canadian woman ill with ME/CFS for about 11 years, plus fibromyalgia, POTS, SIBO and MCAS, who declined from moderate to severe after COVID vaccinations and has been housebound for about five years, lying down most of the day. Ashwagandha, holy basil,…

  • Partly bedbound with long COVID, now much better after low-histamine diet and supplements

    Much better Kestrel 61314 Long COVID Moderate at worstIll 5 months before improving or writing reddit.com Oct 2026

    Long COVID began in December 2023 after a mild infection, with constant depersonalisation, panic attacks, insomnia and breathlessness; at worst suicidal; partly bedbound from PEM. A strict low-histamine diet, cold showers, breathing work, yoga nidra and…

  • Long COVID, barely walking at worst, now much better with pacing and gluten-free diet

    Much better Trail 69409 Long COVID Moderate at worstIll 6 years before improving or writing reddit.com Oct 2026

    She caught COVID in May 2020 and had years of relapsing fatigue, brain fog, depression and insomnia, at worst barely able to manage stairs or walk in a straight line while still working from home. Vaccines gave gains that faded; pacing and a gluten-free diet…

  • Unable to stand or walk across the room with ME/CFS, now much better on supplements and NaturDAO

    Much better Tulip 50673 ME/CFS Severe at worstIll 30 years before improving or writing reddit.com Oct 2026

    Tulip 50673's ME/CFS came from latent EBV after some 30 years of wear, with MCAS and histamine intolerance on top. They retired early, unable to stand or walk across the room. Supplements and NaturDAO brought a night-and-day change; they now do yard work and…

  • Housebound and mostly in bed with ME/CFS, Abilify helped then relapse

    Relapsed Hare 75846 ME/CFS Severe at worstIll 16 years before improving or writing reddit.com Oct 2026

    A US software engineer who fell ill in 2010 at age 30 went from mild to severe after pushing himself while preparing to change jobs in 2017, ending up housebound and mostly in bed. Low-dose Abilify lifted him from severe to mild within weeks in 2020, but the…

  • ME/CFS very severe and bedbound, still extremely severe; lorazepam, magnesium helped sleep

    No benefit Doesn’t credit it · WorseHill 82091 ME/CFS Very severe at worstIll for 4 years reddit.com Oct 2026

    After two years of mild symptoms only after sport, Hill 82091 declined from mild to very severe over about five months after starting a job in late 2025. A chiropractic neck adjustment in February 2026 took them from moderate to severe. They became fully…

  • Severe ME/CFS, housebound and often bedbound; walking better after physio, then relapsed

    Relapsed Doesn’t credit it · No changePebble 29054 ME/CFS Very severe at worstIll 10 years before improving or writing reddit.com Oct 2026

    Pebble 29054, in the UK, has suspected ME/CFS and describes a decline from mild to severe after NHS GET/CBT and exercise, now housebound and often bedbound with crashes, sleep disruption, headaches, dizziness, GI/IBS and electrolyte problems. A private…

  • Long COVID too faint to walk or drive, now good most days at about 80-85%

    Much better Doesn’t credit it · Not saidGrove 43730 Long COVID Moderate at worstIll 6 months before improving or writing reddit.com Oct 2026

    A woman who fell ill with long COVID in August 2023 was too faint to walk around much or drive, with brain fog, breathlessness and anxiety. Quitting her job and resting six months, plus supplements, brought her to about 90% by mid-2024, but a January 2025…

  • Bedbound 18 months with long COVID, now much better after sleep and salted water

    Much better Doesn’t credit it · Not saidPuffin 90449 Long COVID Severe at worstIll 18 months before improving or writing reddit.com Oct 2026

    Puffin 90449 caught Covid in 2022 and was bedbound for 18 months with long COVID, unable to stand for more than 13-18 minutes. Recovery began only after sleeping 16-20 hours a day for nearly two years, alongside salted water for POTS, antihistamines, iodine…

  • Bedbound in a dark room with long COVID, now much better with LDN and supplements

    Much better Doesn’t credit it · HelpedPetrel 90473 Long COVID Severe at worstIll 3 years before improving or writing reddit.com Oct 2026

    Petrel 90473 got COVID at the end of 2023 and was severe, bed bound in a dark room for months at a time, with dementia-like brain fog, PEM, POTS, joint pain and lost smell and taste. From mid-July 2026 she improved quickly, crediting LDN mainly and taking a…

  • Nearly bedbound and housebound with ME/CFS, now much better after T4/T3 and diet changes

    Much better Doesn’t credit it · Not saidQuail 70138 ME/CFS Severe at worst reddit.com Oct 2026

    Quail 70138 had CFS and hypothyroidism and was nearly bedbound/housebound before a decade-long improvement to moderate-mild. Treating subclinical hypothyroidism with T4/T3, plus diet changes, hydrocortisone, amino acids and PQQ with ubiquinol, helped: she…

  • Five-month ME/CFS crash with light and sound intolerance, now much better with pacing

    Much better Doesn’t credit it · HelpedStarling 51931 ME/CFS Severe at worstIll 2.5 years before improving or writing reddit.com Oct 2026

    She fell ill with COVID-19 in April 2022 and developed long COVID, ME/CFS and orthostatic tachycardia. After worsening overall in the first year and a half, she had a five-month crash in early 2024 when she could barely do things and could not tolerate light…

  • Long COVID with years of fatigue and brain fog, now much better after nicotine patches

    Much better Doesn’t credit it · No changePetrel 84910 Long COVID Mild at worstIll 4.5 years before improving or writing reddit.com Oct 2026

    Petrel 84910 caught COVID in December 2019 and had cyclical fatigue, brain fog, breathlessness, tinnitus and anxiety for years, episodes becoming more frequent with a ten-week crash in early 2025. Nicotine patches, LDN, cetirizine and electrolyte drinks…

  • Almost bedbound with long COVID, now much better with LDN and low-dose aripiprazole

    Much better Doesn’t credit it · Not saidSpruce 17588 Long COVID Severe at worstIll 17 months before improving or writing reddit.com Oct 2026

    A man in Germany developed post-viral fatigue, PEM, small-fibre neuropathy, POTS and food intolerances after a Covid infection in May 2025. He crashed to almost bedbound after overexertion, then improved with pacing and time, and credits LDN and low-dose…

  • Severe, housebound ME/CFS, still severe with no lasting benefit

    No benefit Doesn’t credit it · HelpedTrail 91180 ME/CFS Severe at worstIll for 4 years reddit.com Oct 2026

    Trail 91180 has had long COVID with the ME/CFS pattern since mid 2022, severe and housebound with PEM and insomnia; a wisdom tooth extraction made things worse. Ivermectin helped early but stopped working and, at 36 mg, left heart discomfort when lying on…

  • Severe, mostly housebound ME/CFS, now somewhat better with beta blockers and pacing

    Somewhat better Doesn’t credit it · HelpedPebble 99135 ME/CFS Severe at worstIll 40 years before improving or writing reddit.com Oct 2026

    Pebble 99135, a US voice teacher, probably had ME/CFS since mono at 16 and spent three decades mild to moderate, mostly undiagnosed. Two COVID infections made her severe and mostly housebound. From 2025 beta blockers, amitriptyline and pacing, with sodium…

  • Long COVID pain and pooling at six years, somewhat better with pentoxifylline and kratom

    Somewhat better Doesn’t credit it · WorseSandpiper 53110 Long COVID Moderate at worstIll 6 years before improving or writing reddit.com Oct 2026

    Six years into long COVID, with a pain- and pooling-dominated neurovascular subtype, they tried many drugs, supplements, diets and therapies without luck. Pentoxifylline and the hepatitis C antiviral Ledifos helped pain and pooling, and kratom further cut…

These are the newest 8 of the 155 who credit Selenium for their improvement, then the newest 12 of the 243 who tried it without crediting it, in about the same proportion as the full list.

A little hope, every Sunday

New recovery stories and data-driven research on ME/CFS and long COVID. Ideas worth considering, and the evidence behind them.

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