Names of subreddits containing ‘brain fog’, verbatim, grouped by theme
| Illness and disease | 363 |
| COVID-19 and long COVID-19 subreddits: covidlonghaulers (60), COVID19positive (13), Long COVID-19 (6), COVID-19 Vaccinated (3), Other COVID-19 subreddits (1 post only) (5) | 87 |
| ADHD | 32 |
| BrainFog | 30 |
| Depression | 12 |
| Fibromyalgia | 12 |
| Other subreddits (<10 posts): cfs [chronic fatigue syndrome]* (9), Hypothyroidism (8), Celiac (7), mentalhealth (7), SIBO [small intestine bacterial overgrowth] (6), Migraine (6), Lupus (6), PMDD [premenstrual dysphoric disorder] (6), POTS [postural orthostatic tachycardia syndrome] (5), PCOS [polycystic ovary syndrome] (5), EDAnonymous [eating disorders] (5), tressless [‘for sufferers of alopecia and balding’]* (5), Multiple Sclerosis (4), gravesdisease (4), dpdr [depersonalization/derealization disorder] (4), Sleep Apnoea (4), Candida (4), Anxiety (4), Schizophrenia (3), dysautonomia (3), Finasteride Syndrome (3), Gastritis (3), Hashimotos (3), MCAS [mast cell activation syndrome] (3), adhdwomen (3), bipolar2 (2), B12_Deficiency (2), GERD [gastro-oesophageal reflux disorder] (2), iih [idiopathic intracranial hypertension], (2) CrohnsDisease (2), AnorexiaRecovery (2), Mononucleosis (2), Narcolepsy (2), ibs [irritable bowel syndrome] (2), Concussion (2), ehlersdanlos (2), Derealization (2), Chemical Sensitivities (2), POIS [postorgasmic illness syndrome] (2), other subreddits with 1 post only (42) | 190 |
| Prescribed and non-prescribed drugs use or discontinuation | 134 |
| Antidepressants: antidepressants (6), Lexapro [escitalopram] (5), Zoloft [sertraline] (4), Wellbutrin_Bupropion [4], Prozac [fluoxetine] (3), SSRIs (2), bupropion (2) | 26 |
| Cannabis and related compounds: leaves [support in quitting cannabis and related compounds] (12), trees (3), petioles (2), delta-8 (2), weed (2) | 21 |
| Nicotine use and withdrawal: stopsmoking (8), QuitVaping (6), Cigarettes [‘share your passion for smoking’] (2) | 16 |
| Other subreddits (<10 posts): Nootropics [‘nootropics and cognitive enhancers] (8), Testosterone [‘testosterone replacement therapy and testosterone levels’] (8), stopdrinking [alcohol] (6), floxies [‘a subreddit those affected by fluoroquinolone antibiotics’] (5), Supplements [‘supplements and neutraceuticals’] (4), dxm [dextromethorphan] (4), Drugs (3), Accutane (3), decaf (3), DPH [diphenhydramine] (2) TherapeuticKetamine (2), other subreddits with 1 post only (23) | 71 |
| Medical advice | 44 |
| AskDocs (30), medical_advice (6), DiagnoseMe (4), medical (4) | 44 |
| Other | 170 |
| Sexual: NoFap [not masturbating] (32), Semenretention [‘to discuss the physical and spiritual benefits of’] (6), pornfree (4), NoFapChristians (2) | 44 |
| Other subreddits (<10 posts): birthcontrol (8), glutenfree (2), AutoImmuneProtocol [‘the Auto Immune Protocol diet’] (2), CopperIUD [intrauterine device] (2), relationship_advice (4), Advice (4), StackAdvice (4), TheLongLived (3), self (3), offmychest (3), loseit [weight loss] (2), Microbiome (2), Neuropsychology (2), sexualhealth (2), Periods (2), medicalmedium (2), other subreddits with 1 post only (79) | 126 |
| Total | 711 |
*(‘Additional information from subreddit homepage)’, (clarifying information and expanded acronyms from authors of manuscript)).
ADHD, Attention deficit hyperactivity disorder.