Bryan Johnson engagement report
@bryan_johnson - 2.2M followers on X
Measured over 73 original posts from a 30-day window, last computed on October 28, 2026.
Engagement
A typical post picks up 2.4K interactions against 2.2M followers, an engagement rate of 0.11%. Measured over 73 original posts, its engagement rate beats 72% of 21,185 tracked accounts of a similar size, which puts it in the middle of its size range rather than at either end. Posts are seen about 176K times each, and 1.37% of those impressions turn into an interaction. That is about 8.07% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 4.2 posts a day over the last 30 days, with activity on almost every day in the window. Most posts go out around 17:00 UTC, and Tuesday is the busiest day of the week. Of the 73 posts sampled, 52% carry an image or video and 8% are part of a thread. The account's strongest tracked post pulled 101K interactions, about 42x its own typical post.
Measured over 73 original posts from a 30-day window, last computed on October 28, 2026.
Compared with accounts its own size
Bryan Johnson's engagement rate beats 72% of the tracked X accounts closest to it in follower count (21,185 accounts, accounts of similar size (decile 10 of 10)). A percentile is spread evenly by construction, so 50 really is the middle of that group and 90 really is its top tenth.
On engagement per impression rather than per follower it beats 56% of the same group. When those two numbers disagree, the gap is about how far its posts travel rather than how people react to them.
Where this sits in the catalog
At 0.11%, Bryan Johnson sits above the 25th percentile of the 211,975 accounts in this comparison. That places it in the below the median band, which runs 0.025% to 0.146%.
Show the percentile table
| Percentile | Engagement rate |
|---|---|
| 10th percentile | 0.004% |
| 25th percentile | 0.025% |
| 50th percentile | 0.146% |
| 75th percentile | 0.694% |
| 90th percentile | 2.61% |
| 99th percentile | 83.1% |
This ruler is the whole measured catalog, not a size-matched group: it shows where the raw rate falls across every account we can measure, all of which are large. For a like-for-like comparison, read the size-band percentile above instead. See how the bands are built
Posting timing
This account posts most often around 17:00 UTC, and Tuesday is its busiest day of the week. The bars below are the catalog-wide pattern, with this account's own busiest slot marked. They do not show how this account performs at each hour: we keep one aggregate per account, not one per hour, so that measurement does not exist in our data.
Show engagement by hour posted, utc as a table
| Hour (UTC) | Vs author median | Posts |
|---|---|---|
| 00:00 UTC | -1% | 89K |
| 01:00 UTC | -2% | 90K |
| 02:00 UTC | -3% | 88K |
| 03:00 UTC | -4% | 94K |
| 04:00 UTC | -5% | 76K |
| 05:00 UTC | -4% | 75K |
| 06:00 UTC | -5% | 86K |
| 07:00 UTC | -5% | 93K |
| 08:00 UTC | -4% | 108K |
| 09:00 UTC | -4% | 124K |
| 10:00 UTC | -3% | 129K |
| 11:00 UTC | -3% | 141K |
| 12:00 UTC | -3% | 154K |
| 13:00 UTC | -3% | 167K |
| 14:00 UTC | -4% | 173K |
| 15:00 UTC | -2% | 176K |
| 16:00 UTC | -3% | 171K |
| 17:00 UTC | -3% | 159K |
| 18:00 UTC | -2% | 149K |
| 19:00 UTC | -2% | 141K |
| 20:00 UTC | -1% | 131K |
| 21:00 UTC | 0% | 116K |
| 22:00 UTC | -2% | 100K |
| 23:00 UTC | -1% | 90K |
Show engagement by day of week as a table
| Day | Vs author median | Posts |
|---|---|---|
| Sunday | +5% | 393K |
| Monday | +1% | 483K |
| Tuesday | -2% | 520K |
| Wednesday | -3% | 472K |
| Thursday | -2% | 430K |
| Friday | -3% | 447K |
| Saturday | +2% | 393K |
Formats this account uses
Its own posting mix on the left, and what each of those formats does across every account we track on the right. Only formats where the effect clears our publish test appear here, so an empty row is a format we could not measure rather than one that does nothing.
| Format | This account | Catalog effect | 95% interval | Accounts behind it |
|---|---|---|---|---|
| Image or video | 52% of posts | +111% | +108% to +115% | 34K |
| Outbound link | 0% of posts | -41% | -42% to -40% | 32K |
| Typical length | - | +15% | +14% to +16% | 32K |
- 52% of this account's sampled posts carry an image or video. Across the catalog, posts with an image or video run 111% above the same accounts' other posts.
- 0% of its posts carry a link off X. Across the catalog, posts with an outbound link run 41% below the same accounts' other posts.
- Its average post runs 489 characters, which falls in the over 280 characters band. Across the catalog, posts over 280 characters run 15% above the same accounts' other posts.
These are catalog-wide differences applied to this account's own posting mix, not a measurement of how each format performs for this account specifically. We keep one median per account, not one per format per account, so the second thing is not something this data can tell you.
Best tweets
- Aug 15, 202642x their median
https://t.co/Wma9jFMlaN
- Jun 9, 202625x their median
This is biblical. A woman in her eighties. Ten years into Alzheimer's. Hadn't spoken a full sentence in five years. Takes one, 5 gram dose of psilocybin. She slept 19 hours and woke up and spoke for hours about her life, recognized family and held real conversations. She regained bladder control after five years, walked on her own. and dressed herself. Gains held for weeks.
- Dec 11, 202415x their median
On @netflix Jan 1 2025 is the year of don’t die https://t.co/RJosMclnJb
- May 7, 202612x their median
🚨 I HAVE NO MICROPLASTICS IN MY BALLS 🚨 This should not be possible. Studies show that 100% of men have microplastics in their semen. I am the first human ever to show a complete reduction to zero. This may be a world-first breakthrough in fertility research. I had 165 microplastic particles in my semen just 18 months ago. Now, I have zero. Five published studies have measured microplastics in human semen. Two found them in 100% of men. The other three found then in 44 to 76% of men tested, but those used methods that miss the smallest particles and the clear ones. Corrected for that, the real rate is likely 100%. Almost every man alive has plastic in his semen right now. The same applies to testicular tissue, testing 100% positive for microplastics. Microplastics hurt sperm. Human studies show the impact of various types of plastic, associated chemicals, and other toxins on male fertility: + 60% fewer normal shaped sperm (from PFAS) + 5x higher odds of low sperm count (from PTFE) + 10% lower sperm concentration (from PTFE) + 15% lower swimming ability (from PTFE) + 41% lower swimming ability (from PET) + 12% lower sperm swimming ability (from BPA) + 3x higher odds of low sperm count (from Phthalates) + 2x higher odds of poor swimming (from Phthalates) The effects compound: each extra type of plastic drops sperm swimming ability by about 21%. This matters even if you’re NOT trying to get pregnant. Sperm count is one of the cleanest biomarkers of overall health we have. And microplastics don't stop at the testes. The same particles are showing up everywhere we look. Studies show 4.5x higher rate of heart attack, stroke, and death in people with microplastics in their arterial plaque vs. those without. Microplastics were also found in 100% of human placentas tested. 100% of post-mortem human brains tested positive for microplastics. Brain concentrations rose ~50% between 2016 and 2024, and now sit at roughly 11x the levels found in the liver or kidney. Where do these come from? + PTFE, commonly in non-stick pans + PET, water bottles + Phthalates, makes plastic soft and bendy + BPA, can linings + PFAS, stain-resistant fabrics & food packaging Inside the body, plastic causes a kind of cellular rust. It triggers inflammation in the testicles, kills the cells that make sperm and drops testosterone. It's been confirmed across 39 animal and cell studies, then in human data. MY PROTOCOL: Note, what I did is n=1, not a controlled trial, I cannot prove cause. 1. Sauna (dry). My toxin blood panel confirms sauna clears plastic related chemicals: BPA, phthalates, PFAS, flame retardants, pesticides. The plastic particles themselves are too big to sweat out directly. Heat may activate other clearance routes: bile flow through the liver, the cell's internal cleanup system, and the gut barrier. Humans have almost no enzymes that can break plastic apart, so the body has to physically push it out. 2. Reverse osmosis water filter. Drinking water is likely a major source of microplastic getting into your body. A reverse osmosis filter pushes water through a very tight membrane and strains the particles out. I filter everything I drink. 3. Trying to rid my environment of the big plastic items: cutting boards, cups, plates, food storage containers, non-stick pans, cling wrap, tea bags, water bottles, kitchen utensils, kettles, and synthetic clothing. Note, as hard as I try, I'm always finding new plastic things in my life. This can be all-consuming thing so try to just knock out the big ones. I did all three interventions at the same time. I cannot say which one did the most work. What I can say is this: going from 165 to zero in 18 months is possible. Results: Nov 2024: 165 particles/mL Jul 2025: 20 particles/mL Apr 2026: 0 particles/mL The 18 month window also captures roughly 7 full spermatogenesis cycles.
- Aug 30, 202611x their median
Kate’s period will start any minute now…. I’ve been waiting for 34 days. This is historic; the most measured menstrual cycle in history. What we’ve measured so far: > 408 min of brain data > 10k blood glucose readings > 48,960 core body temp readings > 136 photos of her body > much more.. see below In total, 14 million data points. Full list of what we’re measuring: > core body temp via ingested pill > pain threshold > grip strength > photograph of the body > body thermal temperature > blood pressure > weighing menstrual blood > cortisol > blood glucose > DNA methylation > oral microbiome > stool microbiome > urine metabolites for hormones > stool microbiome > vaginal microbiome > cervical mucus > sleep > wearable > resting metabolic rate > metabolism. > techno-tampon, for lady boners > reaction time > skin biological age > brain with Kernel > breast measurement > urine concentration > hormone concentration > weight > nutrition proud of @_katetolo for becoming the world's most measured woman
- Oct 14, 202611x their median
laying my entire body weight on my crocodile wife that i love https://t.co/MO8pLdFYKT
- Aug 20, 202610x their median
I got a dog. Dog owners have about a 24% lower risk of dying early. What should I do now? https://t.co/eOqo1zZowZ
- Oct 5, 20269.0x their median
What the FUCK is going down on Facebook marketplace 😭 https://t.co/RWt8fA1SxB
- Aug 6, 20268.4x their median
I know some of you find me insufferable sorry about that
- Jul 21, 20266.9x their median
Being mean is bad for your health. A single hostile interaction: + locks you in a cortisol penalty box for 60-90 min + suppresses recovery capacity + elevates your heart rate Kindness conserves your energy resources.
Ranked by total interactions across everything we have tracked for this account, which is a longer history than the 30-day window the rates above use. The multiple compares each post to this account's own median.
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Reading these numbers
A typical post picks up 2.4K interactions against 2.2M followers, an engagement rate of 0.11%. Measured over 73 original posts, its engagement rate beats 72% of 21,185 tracked accounts of a similar size, which puts it in the middle of its size range rather than at either end. Posts are seen about 176K times each, and 1.37% of those impressions turn into an interaction. That is about 8.07% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 4.2 posts a day over the last 30 days, with activity on almost every day in the window. Most posts go out around 17:00 UTC, and Tuesday is the busiest day of the week. Of the 73 posts sampled, 52% carry an image or video and 8% are part of a thread. The account's strongest tracked post pulled 101K interactions, about 42x its own typical post.
- What is Bryan Johnson's engagement rate on X?
- Bryan Johnson (@bryan_johnson) has an engagement rate of 0.11%, based on the median interactions across 73 original posts from the last 30 days against 2,181,451 followers. Replies, reposts and quote-posts of other people are excluded from that sample.
- Is that a good engagement rate?
- At 0.11%, Bryan Johnson sits above the 25th percentile of the 211,975 accounts in this comparison. Those comparison accounts are all large ones, because our scanning cadence is weighted towards big accounts, so this is a ranking among peers of similar scale rather than a ranking across X.
- Does @bryan_johnson have real engagement?
- Its engagement rate beats 72% of the tracked X accounts closest to it in follower count (21,185 accounts), which puts it in the middle of its size range group. Ranking inside a size band matters because engagement rate falls as accounts grow, so a raw rate would mostly re-measure the follower count. It is a starting point for a look at follower quality, not a verdict on it.
- When does @bryan_johnson post?
- Most posts go out around 17:00 UTC, and Tuesday is its busiest day, at roughly 4.17 posts per day across the measured window.