r/nutrition vs r/loseit

Side-by-side using public descriptions, members, growth and rule titles from SubMouse. Missing fields show as n/a. Adult communities are excluded.

Swap sides New comparison Related to r/nutrition Related to r/loseit

Nutrition science room vs weight-loss support room

r/nutrition’s public description is for discussion of nutrition science — macronutrients, micronutrients, vitamins, diets and nutrition news — with civil discourse required. r/loseit describes a place for people of all sizes to discuss healthy and sustainable methods of weight loss.

In our directory, nutrition is larger (about 5.9M, rank #137) than loseit (about 4.2M, rank #223). Activity samples reverse that: loseit posts far more often (~72 posts/day vs ~9). Both samples in our window are essentially all text.

Rule titles: nutrition bans dietary activism, wholesale science rejection, medical advice, personal diet-eval dumps and blogspam; loseit emphasizes kindness, bans harassment/politics off-topic and self-promotion, and wants detail on progress posts. SubMouse already compares loseit with Fitness and keto; this pair is nutrition science versus weight-loss support.

Choose r/nutrition for science-framed nutrient and diet discussion under its no-medical-advice and no-activism rules.
Choose r/loseit for weight-loss support and habits under its kindness and anti-harassment rules.
Both sit outside the current Top 100 cut. loseit-vs-fitness and keto-vs-loseit are separate curated pages.

Written comparison based on public descriptions and rule titles · updated 2026-11-07.

r/nutrition

Nutrition

A subreddit for the discussion of nutrition science. Macronutrients, micronutrients, vitamins, diets, and nutrition news are among the many topics discussed. Civil discourse is required.

Members: 5.9M
7-day growth: +576
Posts/day: 9.4
Directory rank: #137
Created: Nov 17, 2008
Submissions: Text posts

Sample mix: text posts 100%

Topics: Nutrition

Rule titles (short names we collected)

Follow reddiquette
No dietary activism / crusading
No all science rejection or wholesale conspiracy comments
No requesting or giving advice related to medical concerns
No personal situation or diet eval posts
No blogspam or self-promotion
Links must be direct
New and negative karma accounts are restricted

Open r/nutrition on SubMouse

r/loseit

loseit - Lose the Fat

A place for people of all sizes to discuss healthy and sustainable methods of weight loss. Whether you need to lose 2 lbs or 400 lbs, you are welcome here!

Members: 4.2M
7-day growth: +1.4K
Posts/day: 72.1
Directory rank: #223
Created: Jul 29, 2010
Submissions: Text posts

Sample mix: text posts 100%

Topics: Weight Loss

Rule titles (short names we collected)

Use the Report Option
Be Good to One Another
Do Not Feed the Trolls
No Harassment / Don't Be a Creep
No Politics / Stay On Topic
No Promotion of Diet Cash Pools/Requests for Money
No Self Promotion
No Surveys
SV/NSV, Progress, Milestone Posts Need Details
No Promoting or Encouraging Unhealthy Weight Loss Methods
No Accountability Partner Posts
No Standalone Weight Loss Medication Posts

Open r/loseit on SubMouse

Supported differences

Aspect	r/nutrition	r/loseit
Public focus (from each community’s public description)	A subreddit for the discussion of nutrition science. Macronutrients, micronutrients, vitamins, diets, and nutrition news are among the many topics discussed. Civil discourse is required.	A place for people of all sizes to discuss healthy and sustainable methods of weight loss. Whether you need to lose 2 lbs or 400 lbs, you are welcome here!
Size r/nutrition is larger in our directory.	5.9M members	4.2M members
Posting activity (our sample)	9.4/day	72.1/day
Common post types in our sample	text posts 100%	text posts 100%
Topic tags on SubMouse	Nutrition	Weight Loss
Selected rule titles (short names we collected)	Follow reddiquette; No dietary activism / crusading; No all science rejection or wholesale conspiracy comments; No requesting or giving advice related to medical concerns; No personal situation or diet eval posts	Use the Report Option; Be Good to One Another; Do Not Feed the Trolls; No Harassment / Don't Be a Creep; No Politics / Stay On Topic

Rules and posting patterns we can verify

nutrition short titles include: follow reddiquette; no dietary activism/crusading; no all-science rejection or wholesale conspiracy comments; no requesting or giving medical advice; no personal situation or diet-eval posts; no blogspam or self-promotion; links must be direct; new/negative-karma accounts restricted. Our sample is text-forward.

loseit: use the report option; be good to one another; don’t feed trolls; mark NSFW when appropriate; no harassment; no politics / stay on topic; no diet cash pools; no self-promotion or surveys; progress posts need details.

Where this comparison comes from

Public descriptions and member counts from SubMouse’s safe-for-work directory. Short rule titles and activity samples SubMouse collected. Short titles only. Related curated pages: loseit-vs-fitness, keto-vs-loseit.

Members and public descriptions come from SubMouse's safe-for-work directory (as of 2026-11-02 UTC); 7-day growth measured from 2026-10-26. Posts/day and post-type mixes appear when we have an activity sample. Rule lines are short titles, not the full sidebar. Directory rank is listing order — communities outside the current Top 100 open in the info tool instead of a full community page.