About r/HaircareScience
Community guide
r/HaircareScience (#999, about 1.1 million) is a science-focused hair-care room: the rules say to source your facts, that this is not medical advice, and that it is not a product-review, coloring, styling or DIY subreddit.
What belongs
Text discussion (about 4 posts/day). Rules require sourced claims, respect and no advertising; advice requests belong in the weekly advice thread. They also bar hair-loss or balding advice requests, product reviews or recommendations, coloring or styling help, DIY projects, water-quality advice, and treating the room as your doctor.
Versus product-review and styling rooms
Broader beauty or product-haul rooms optimize for recommendations. This one wants scientific discussion of hair and scalp, with reviews and how-to styling sent elsewhere.
Practical pointers
Cite sources; put personal “what should I buy?” questions in the weekly thread rather than a new post.
Among the 20 communities on our science list it is number 8 by size. It sits just behind r/pitbulls (#998) in our ranking.
What sets r/HaircareScience apart
r/HaircareScience is far more text-driven than most big subreddits: 100% of its recent posts are text posts, against a median of 35% across the Top 100. r/HaircareScience is more of a browsing community than a debating one: 3.9 comments per post on average, well under the Top 100 median of 13.0. Growth has more or less levelled off (0.00% since Oct 29, 2026), which is common for very mature communities.
Subscriber growth
Between Oct 29, 2026 and Nov 2, 2026, r/HaircareScience stayed flat from 1,058,132 to 1,058,132 subscribers. The chart shows 2 weekly subscriber counts.
What r/HaircareScience talks about
Across 25 recent posts (Oct 29–Nov 4), the words that come up most are “hair”, “products”, “wash”, “shampoo” and “color”. Other frequent themes are change, scalp, curl and treatment. By format, 100% are text posts.
Popular post flairs: Question (21), Discussion (4).
Activity and best time to post
r/HaircareScience gets about 4.1 new posts a day. The public archive holds 116,899 posts and 453,738 comments in total, about 3.9 comments per post. Last week the busiest day was Sunday (6 posts) and the quietest was Monday (2). Posting peaks around 09:00 UTC and is lowest around 02:00 UTC.
Rules of r/HaircareScience
The moderators of r/HaircareScience list 12 rules. In short:
- Source Your Facts
- We Are Not Your Doctor
- Post Advice Requests in the Weekly Advice Thread
- No Repetitive Posts
- This is a Science Subreddit
- No Advertising
- Be Respectful
- No Asking for Advice on Hairloss or Balding
- This is Not a Product Review or Recommendation Sub
- This is Not a Hair Coloring or Styling Sub
How to join
Open reddit.com/r/HaircareScience and press “Join”. Read the community rules in the sidebar before you post: every subreddit is run by its own volunteer moderators.
Frequently asked questions
How many subscribers does r/HaircareScience have?
r/HaircareScience has 1,058,132 subscribers (Nov 2, 2026), which makes it the #999 safe-for-work subreddit in the SubMouse ranking.
Is r/HaircareScience still active?
Yes. r/HaircareScience gets about 4.1 new posts a day (average of the last four weeks). Over its lifetime the archive counts 116,899 posts and 453,738 comments.
What is the best time to post in r/HaircareScience?
Based on post counts from Oct 29, 2026 to Nov 4, 2026, the busiest day was Sunday and the quietest Monday, and most posts arrive around 09:00 UTC, with the fewest around 02:00 UTC. More posts also means more competition, so a quieter hour can help a post get noticed.
What kind of posts are on r/HaircareScience?
r/HaircareScience is a large Reddit community. Recent post titles often mention hair, products, wash, shampoo and color. Most posts are text posts (100%).
Is r/HaircareScience SFW?
Yes. Reddit does not mark r/HaircareScience as an 18+ (NSFW) community. SubMouse lists safe-for-work subreddits only.
What are the rules of r/HaircareScience?
Join the community on Reddit first, then use “Create post”. r/HaircareScience accepts both text and link posts. It has 12 posted rules, starting with: “Source Your Facts”; “We Are Not Your Doctor”; “Post Advice Requests in the Weekly Advice Thread”. Moderators remove posts that break the rules, so read them in the sidebar before posting.
What subreddits are similar to r/HaircareScience?
Communities with similar topics include r/psychology (4.9M), r/science (34.6M), r/askscience (26.4M), r/compsci (4M) and r/KerbalSpaceProgram (1.5M).
Stats from public data (data updated Nov 2, 2026; activity, rules and archive totals via the Arctic Shift archive, Nov 6, 2026). Point and comment counts are archive snapshots and can be lower than on Reddit today. SubMouse is an independent directory and is not affiliated with Reddit or the moderators of r/HaircareScience.