| Rank | Board name and description | Posts | Members |
| 1 | Doctissimo.fr French medical help and health forums | 98185241 | 1456507 |
| 2 | Bodybuilding.com Bodybuilding and fitness related forums | 69461259 | 3488374 |
| 3 | Wizaz.pl Women message board (in Polish) | 35524013 | 917196 |
| 4 | Student Doctor Forum for students in the health care industry | 13469671 | 382970 |
| 5 | Baby and Bump Pregnancy forum | 13277564 | 181667 |
| 6 | Low Carber Diet and low carb support message boards | 8107868 | 149114 |
| 7 | Elite Fitness Diet and fitness and bodybuilding message boards | 8031746 | 173809 |
| 8 | Dutch Bodybuilding Bodybuilding forum (in Dutch) | 7363395 | 118196 |
| 9 | Low Carb Friends Low carb diets discussion forum | 5045220 | 57722 |
| 10 | MiniMins Weight loss support forum | 4892156 | 81959 |
| 11 | Acne.org Message Boards Acne problems discussion forum | 4884996 | 96366 |
| 12 | Health boards Health and diseases message boards | 4756976 | 977780 |
| 13 | Three Fat Chicks Weight loss Forum | 4399652 | 171407 |
| 14 | LPSG Large Penis Support Group forums | 3821314 | 471159 |
| 15 | Pregnancy Forum Pregnancy and parenting forum | 3301639 | 108627 |
| 16 | Kolozzeum Forum Sports and training forums (in swedish) | 3193741 | 34031 |
| 17 | Sober Recovery Alcoholism and Addictions help forums | 3114578 | 119067 |
| 18 | Badger and Blade Shaving and razors discussion forums | 3106319 | 39507 |
| 19 | Psych Central Psychotherapy and mental health forums | 3046727 | 254382 |
| 20 | AskMen Askmen.com (online men magazine) forums | 3030653 | 34990 |
| 21 | Muscle Talk Bodybuilding and nutrition forums | 2835005 | 33600 |
| 22 | Steroidology Bodybuilding and steroids discussion board | 2766698 | 240406 |
| 23 | Bus web board Discussion board related to self-injury | 2743852 | 12864 |
| 24 | Cerco un Bimbo Fertility discussion forum (in Italian) | 2727277 | 48534 |
| 25 | Anabolic Minds Nutritional supplements discussion forum | 2724109 | 131379 |
| 26 | Allnurses.com Nurses discussion forums | 2572754 | 256964 |
| 27 | Iron Magazine Body building message board | 2566519 | 91410 |
| 28 | Pakkotoisto Finnish bodybuilding forum | 2561719 | 49834 |
| 29 | Veggie Boards Vegetarian and vegan message boards | 2443121 | 47606 |
| 30 | Hyster Sisters Women community for issues related to GYN diseases and complications | 2346519 | 128967 |
| 31 | She Knows Pregnancy discussion and advice message boards | 2322944 | 49498 |
| 32 | Imperium Sportu Sports message board (in polish) | 2300170 | 72303 |
| 33 | Provida Weight loss and health message boards | 2273636 | 196251 |
| 34 | Discuss Anything General discussion forum | 2156559 | 13680 |
| 35 | All Deaf Forum for the deaf and hard of hearing | 2111656 | 54184 |
| 36 | Wannabe Big Forums Bodybuilding message boards | 2075815 | 61445 |
| 37 | Dimensions Forums Dimensions magazine message boards | 1938795 | 60292 |
| 38 | Cannabis Forums Cannabis discussion forum | 1934734 | 196407 |
| 39 | Bodyweb.it Italian bodybuilding forums | 1897474 | 12924 |
| 40 | Recover your Life Self Harm discussion and support forume viewable on the page the URL links to. | 1855221 | 10896 |
| 41 | Nedug Free medical consultation forum (in russian) | 1851089 | 15124 |
| 42 | BPAL Madness! Bpal oils discussion and reviews | 1752905 | 19150 |
| 43 | Beauty Board Beauty and welness discussion forums (in German) | 1663799 | 7826 |
| 44 | BBS zene Fitness & bodybuilding forum (in German) | 1648050 | 124209 |
| 45 | Cooking Light Cooking message board | 1638821 | 258934 |
| 46 | Lap Band Talk Lap band surgery forums | 1515962 | 102408 |
| 47 | Tour Magazin Tour Magazin discussion forum in German | 1490412 | 16828 |
| 48 | Ovusoft Parenthood and pregnancy message boards | 1462059 | 14908 |
| 49 | Spankmag Youth general discussion | 1404767 | 14947 |
| 50 | ValueMD Medical schools forum | 1273669 | 132902 |
| 51 | Discuss Cooking Cooking message board | 1210757 | 45763 |
| 52 | GeoParent Community focussed on family life, parenting and pregnancy | 1206128 | 11085 |
| 53 | Body.se Swedish bodybuilding forums | 1160860 | 40734 |
| 54 | E-cigarette forum Electronic cigarette discussion board | 1113055 | 33290 |
| 55 | Muscle forums Bodybuilding forums | 1092924 | 14145 |
| 56 | SaniHelp Health message board (in Italian) | 1071259 | 49064 |
| 57 | Early Retirement Retired lifestyle forum | 1049098 | 22431 |
| 58 | Anabolex Hardcore bodybuilding forums | 1048658 | 41539 |
| 59 | Basenotes Fragrances and perfumes forum | 996864 | 37061 |
| 60 | I am Tan Indoor tanning forums | 936496 | 8796 |
| 61 | Abnehmen Weight loss forums | 870942 | 20026 |
| 62 | ePharmacyWatch Forum about buying prescription drugs online and telemedicine | 801347 | 128822 |
| 63 | Weed Tracker Medical marijuana forums | 756683 | 83208 |
| 64 | Steroid Forums steroids forum | 707689 | 134624 |
| 65 | Thinner Times forum WEight loss surgery forum | 697384 | 16196 |
| 66 | Mauisun Anti narcotics discussion board | 670837 | 35677 |
| 67 | Avon - discontinued General discussion message boards | 635763 | 6169 |
| 68 | Depression Forums Mental health forums | 615797 | 41078 |
| 69 | PASS support boards Post abortion support forums | 581038 | 9889 |
| 70 | Braintalk Communities Online patient support groups for neurology | 412843 | 70409 |