Method
Eight of ten
This is a method piece rather than an accusation. It sets out what a checksum is, how one was run over the ten portraits supplied with this product, what came back, what came back empty, and — at length, because this is where pieces like it usually go wrong — the precise boundary of what the result supports.
An MD5 digest is a fingerprint computed from every byte of a file, and two files sharing one are the same file. Of the 10 portraits supplied with this product, 8 are byte-identical to portraits carrying different names, ages and cities on other brands' sites. 2 are not. That establishes reuse across brands. It establishes nothing about how any photograph was made.
- Reviews supplied
- 10
- Portraits supplied
- 10
- Byte-identical elsewhere
- 8 of 10
- Matching nothing held here
- 2 of 10
- Other names recorded
- 14
- Most names on one file
- 3
- Commands to repeat it
- One
- What it says about the capsule
- Nothing
What a checksum is, in plain language
A digital file is a sequence of numbers. A photograph is a long one — a few hundred thousand for a small portrait — but it is still a sequence, and two files are the same file when their sequences match end to end.
Comparing two long sequences by hand is impractical, so there is a shortcut. A checksum — or a hash, or a digest; the three words are used interchangeably — is a short string computed from the whole sequence by a fixed procedure. MD5 is one such procedure. Feed it a file and it returns thirty-two hexadecimal characters, every time, on any computer, in any country, for as long as the file is unchanged.
Three properties make it useful, and all three can be checked on any file on your own machine.
- It is deterministic. The same file always gives the same digest. Run it twice, a year apart, on two different computers, and the thirty-two characters are identical.
- It is total. Every byte goes in. Nothing is sampled and nothing is skipped, so a difference anywhere in the file reaches the output.
- It is unforgiving. Change one pixel, re-save at a different compression setting, crop a single row, and the digest does not drift — it changes completely, with no resemblance to the old one.
That third property is what makes a match meaningful. If digests moved gradually as files changed, a match would be a statement about similarity and would need interpreting. They do not. A digest either matches or it does not, and there is no middle ground to argue about.
One honest caveat, since this is a piece about method. MD5 is old, and no longer considered safe where somebody might be trying to engineer two files with one digest; that is why newer software uses SHA-256. The weakness is irrelevant here. In ordinary use, a match means the file was copied.
Why byte-identical means the same file
This is the distinction the whole piece rests on, and it is worth drawing slowly, because most readers compress it into something weaker than it is.
Suppose two sites show portraits of what looks like the same man. Ordinary explanations are available: two brands licensing different frames from one session, one cropping a group photograph, a model appearing in two catalogues. In every one of those cases the files differ — different frames, crops, compression, dimensions. The pictures resemble each other and the digests do not match.
A digest match rules all of that out. It is not a statement that two photographs look alike, or that they show the same person, or that they came from the same session. It is a statement that there is one file, placed on two pages with two different names printed underneath it. Not a similar photograph. Not a second shot of the same model. The same bytes, in the same order.
| What you might be looking at | Would the files differ? | Would the digests match? |
|---|---|---|
| Two frames from one photo session | Yes — different exposures, different bytes | No |
| One image, cropped differently by two sellers | Yes — cropping rewrites the file | No |
| One image, re-saved at a different quality setting | Yes — re-encoding rewrites the file | No |
| One image, resized for a different layout | Yes — resizing rewrites the file | No |
| The same person photographed twice, years apart | Yes, entirely | No |
| One file, copied | No — it is the same file | Yes |
Read the bottom row against the five above it. Every ordinary explanation produces different files and therefore different digests. Only one produces a match, and it is the mechanical, uninteresting one: the file was copied. A method that returns one conclusion and excludes five is worth more than one that returns a judgement.
Exactly how the check was run
Written out in full, because a result nobody can reproduce is an assertion. Eight steps, none needing any skill beyond saving a file.
- 01Save every portrait exactly as it is servedEach of the 10 reviews on this product's page carries a portrait. Every file was saved as served: no resizing, no re-encoding, no cropping. A file that has been through an image editor is a different file, and its digest would be a digest of the edit.
- 02Collect the comparison set the same wayThis desk holds the asset packs for several unrelated products that use the same review layout. Every portrait in every pack was saved identically, from the same kind of source, with the same refusal to touch the bytes.
- 03Compute one digest per fileOne command, run over a directory. MD5 reads every byte in order and returns thirty-two hexadecimal characters. Nothing is interpreted and no judgement enters here at all.
- 04Sort the digests and look for repeatsSorting puts identical digests on adjacent lines, which turns the question into something you can see rather than something you have to hunt for.
- 05Read the names printed beside each repeatFor every repeated digest, write down the name, age and city printed beside each copy, taken from the pages as published. Transcription rather than inference.
- 06Record the non-matches with the same careA file that matches nothing in the comparison set is a result, not a blank. Two of the 10 here produced no match, and both digests are printed alongside the eight that did. A method that only reports its hits is not a method.
- 07Publish the digests, not the conclusionThirty-two characters a row, printed in full, so anybody can repeat the check without taking this desk's word for it.
- 08Stop at what the bytes supportThe digests establish that files are shared between brands. They establish nothing about how any file came to exist, and nothing whatever about the capsules. Writing the limit down in the same breath as the result is part of the method, not a disclaimer added afterwards.
Three choices there are worth defending. The first is saving every file as served: tidying images up, converting them to a common format or normalising the sizes would have destroyed the whole result, because every conversion rewrites the bytes and therefore the digest.
The second is sorting before looking: searching a list for duplicates invites the eye to find what it expects. The third is step six, which most pieces like this leave out, and which has a section of its own further down this page.
How to repeat it in one command
The digests are printed in full so that nobody has to take this desk's word for any of it. Save a portrait from any page that shows one and run one command against it.
On macOS: md5 portrait.webp. On Linux: md5sum portrait.webp. On Windows, in PowerShell: Get-FileHash -Algorithm MD5 portrait.webp. Thirty-two characters come back. Compare them with the tables in the next two sections. They either match a row or they do not, and that is the whole of the check.
To run it over a folder at once and see duplicates fall next to each other, the Linux form is md5sum *.webp | sort. Nothing about this needs a specialist tool, a paid service or any judgement about faces, which is exactly why it is worth publishing.
What makes this a good piece of evidence
It is cheap — one command. It is deterministic — the same input always gives the same output. It is falsifiable — if a digest in the table below did not match the file it names, the table would be wrong and anybody could demonstrate it in a minute. Most claims about marketing material have none of those three properties.
What came back: eight of ten
Eight of the ten. The left-hand column is the digest, the middle column is the name printed beside that file on this product's page, and the right-hand column lists the names the byte-identical file carries on other brands' sites.
| MD5 digest | Signed here | The same file, signed elsewhere |
|---|---|---|
32a88984c01b1812cef24f78f8790c23 | Craig E., 51, Columbus OH | Roy P. (a second brand) Gary X. (a third brand) |
35415d0b774625b4260c2cd969ed9179 | Tom A., 40, Orlando FL | Andre R. (a third brand) |
a73fa5abd0837ef370979bdc4cd9e160 | Robert R., 44, Tucson AZ | Greg T. (a second brand) Andre X. (a third brand) |
b67089d65c44408548c00ebc08356455 | Tony D., 57, Pittsburgh PA | Ray W. (a fourth brand) James X. (a third brand) |
42c2604667c6bdcbda5ea9940ac289e3 | Gerald H., 52, Tampa FL | Wayne L. (a second brand) Wade R. (a fourth brand) Roy S. (a third brand) |
7977d60f8b68be30b3459c22b86b8b4d | Gerald N., 58, Memphis TN | Glenn J. (a third brand) |
6bd612676ee3cf839fd2e0ad603d8335 | Carl Z., 46, Denver CO | Vernon C. (a second brand) |
279e9e73168174be42ade44ebdb0b7d8 | Glenn W., 51, Cleveland OH | Bruce W. (a second brand) Bill E. (a third brand) |
Some arithmetic on that table, because the counts answer the obvious follow-up. Across the eight matched files there are 14 further names recorded. 5 of them sit on what this desk labels a second brand, 7 on a third and 2 on a fourth. The busiest single file carries 3 other names; the quietest carries 1. The names, the ages and the cities change from site to site. The bytes do not change at all.
The other brands are referred to as a second, a third and a fourth rather than named. Naming them would turn a reproducible finding into an accusation against companies that have had no chance to respond, and it would add nothing a reader needs: the digests are printed, so anybody can check a portrait against this table.
All ten supplied reviews and all ten portraits are reproduced in full on the reviews page, as supplied, with nothing cropped, shortened or re-ordered. Leaving the material out would protect it. Printing it is what makes the pattern visible.
The two that did not match
Two of the ten produced no match against anything this desk holds. They belong in this piece at the same weight as the eight, with their digests in the same format — and they are the most informative part of the exercise, because of what they do not mean.
| MD5 digest | Signed here | Result |
|---|---|---|
500ce010eaa6a3c77fecf6cdfe09c797 | Gary N., 66, Detroit MI | No match in the comparison set held by this desk |
527c680daa21bb9c5930be07ebf652d0 | Ray P., 40, Portland OR | No match in the comparison set held by this desk |
Now the careful part. A non-match is a statement about the comparison set, not about the file. This desk holds the asset packs for several unrelated products that use the same review layout. That collection is finite, it was assembled from what happened to be available, and it is certainly a small fraction of the material in circulation. A file that matches nothing in it has failed to match a particular library on a particular day.
What a non-match establishes
- That no copy of this file appears in the comparison set this desk holds.
- That the digest is published, so anybody with a wider collection can run the same check and get further than this desk did.
- That the method reports its misses as well as its hits, which is the only way the hits mean anything.
What a non-match does not establish
- That the portrait is original, or first published here, or exclusive to this product.
- That the person pictured bought anything, reviewed anything or exists as described.
- That the two rows are different in kind from the other eight — the comparison set simply ran out.
- Anything whatever about how the photograph was made. That question is outside what arithmetic on files can answer, and it is not answered here.
There is a second reason these two rows are not a clean bill of health, and it comes from a different method entirely. Both sit inside the fixed closing rotation described in the next section: the review at position 7 closes with the bottle beside the stamp dish, and the review at position 6 closes with it on the fridge door, in the same positions that rotation occupies in review sets supplied for unrelated products. The checksum found nothing on those two files. A different reading of the same two reviews found something.
That is the real lesson of the two non-matches, and it is a lesson about method rather than about this product. A negative result from one test is not a positive result from another. The checksum is a narrow instrument: it answers one question exactly and is silent on every other. Reporting its silence as reassurance would be the same error as reporting its matches as proof of something larger.
The second pattern, in the sentences
The photographs are not the only thing shared. Set the ten supplied reviews beside the sets supplied for unrelated products and the prose resolves into a structure: an occupation line, an objection conceded in the following breath, then a closing pair — a place the bottle is kept, followed by a moment in the day it is taken.
| Position | The place, as supplied | The sentence that follows | Signed here |
|---|---|---|---|
| 01 | on the washer | Kept the box for the lot code. | Craig E. |
| 02 | by the router | Reordered when two days were left. | Tom A. |
| 03 | on the piano | I take it when the porch light goes on. | Robert R. |
| 04 | next to the leash | I take it when the kettle clicks. | Tony D. |
| 05 | in the glove box | I take it when the dryer buzzes. | Gerald H. |
| 06 | on the fridge door | I take it before the first call. | Ray P. |
| 07 | beside the stamp dish | I take it after church coffee. | Gary N. |
| 08 | on the charging pad | I take it after I fill the bird feeder. | Gerald N. |
| 09 | in the lunch tote | I take it when I unroll the PT band. | Carl Z. |
| 10 | on the workbench | I take it before league night. | Glenn W. |
The ten places run on the washer, by the router, on the piano, next to the leash, in the glove box, on the fridge door, beside the stamp dish, on the charging pad, in the lunch tote, on the workbench — in that order, in positions one to ten. The identical ten appear in the identical ten positions in review sets supplied for unrelated products, with different names, ages and cities attached to them.
That is a different kind of evidence from a checksum, and it is weaker. A digest match is mechanical; a shared sentence is a judgement about text, and two listings in one category might land on the same ordinary phrase by chance. What is hard to explain by chance is the order: ten specific places, in ten specific positions, more than once.
Every one of the ten ends with a place the bottle is kept and then a moment in the day, in that order. Real reviews do not share a grammar.
“Page said 54,000 people. I only know my nights.” A buyer writing a review does not usually cite the marketing copy by number in order to be modest about it.
“Price vs the pitch. Fair.” “Less planning around the clubhouse restroom. Fair.” The three- and four-star reviews raise a complaint and withdraw it immediately.
“I still see the urology clinic.” “I didn’t stop the prescribed tablet.” “Not a surgery story.” Three of the ten pre-empt exactly the objection a regulator would raise.
Covered in full on this page, with the digests. Two of the ten match nothing this desk holds, and that is reported here too.
None of those five requires recognising a face, guessing at an origin or doubting anybody's word. Each is a statement about the structure of a supplied document, which is the only sort of statement a desk like this one can make.
What this establishes, and what it does not
This is the section that matters most, and in most pieces of this kind it is the one that is missing. A good finding is destroyed by being stretched. So here are both columns, at the same length, with nothing softened on either side.
What the digests establish
- That 8 of the 10 portraits are reused across brands. Byte-identical to portraits published elsewhere under other names.
- That the names, ages and cities beside them vary between sites. Transcribed from the pages as published, not inferred.
- That 2 of the 10 matched nothing held here. Reported with the same weight, and treated as a limit of the comparison set rather than a result about those files.
- That the finding is reproducible. Thirty-two characters a row, one command, and a result that either matches or does not.
- That the review block was assembled rather than collected. Eight shared files and ten closings in a fixed rotation are not what a pile of customer emails looks like.
What the digests do not establish
- Anything about how any photograph was made. This desk does not speculate about that, here or anywhere, because it cannot check it.
- Who copied what, or in which direction. A shared file says the file is shared. It does not say who had it first.
- That the two unmatched portraits are genuine. A non-match means the comparison set ran out, and nothing more than that.
- Anything about the capsules. Not the formula, not the amounts, not the safety. The label is a separate question with a much better answer.
- That anybody broke a law. No such conclusion is drawn, and none follows from arithmetic on image files.
The first item on the right is a rule rather than a preference. How a supplied picture came to exist is not a question arithmetic can answer, so it is not answered — not in a hedge, not in an implication, not in a caption. The rules this desk writes under are on the about page, including that one.
The fourth is the one readers most often collapse, and on this product that would be especially unfair. Moving from the reviews were assembled to the product is fake is not available: a review block is put together by whoever writes a listing, and a formula by whoever fills the capsules.
Why it matters to somebody deciding
A reader could reasonably ask why any of this should change a buying decision. The pictures are not the product. That objection is fair, and the answer is narrow.
Reviews are the evidence a reader is offered in place of evidence they cannot otherwise get. If eight of the ten faces are shared with other brands and all ten sentences arrive in a fixed rotation, the one category of evidence on offer in that part of the page has been assembled rather than gathered.
Now the part that makes this product different from most, and it belongs here rather than in a footnote. You do not have to rely on the reviews at all. This label carries a complete, fully quantified Supplement Facts panel: 9 rows, 9 printed amounts, no proprietary blend, species and plant parts named, two rows standardised, a complete caution block and a properly qualified country-of-origin mark. That is the most transparent label in this series, and it is a far better document than any testimonial could be.
So the practical consequence is a change of question rather than a verdict. Set the review block aside, since it cannot be checked, and read the document that can be. The panel is transcribed row by row with the arithmetic shown in full, and four of the nine rows change meaning once the sums are done.
The credit this product has earned, printed in the same voice
A reader who ignores every supplied review and reads only the panel still has more to work with here than on any other product this desk has read in this series. Nine ingredients, nine amounts, nothing hidden behind a total. The findings on this site are about arithmetic rather than about absence, and that is only possible because the label did its job.
One more, smaller and purely practical. What the supplied badges certify is set out on the testing page: the label's own country-of-origin mark is correctly drafted, while several of the separate badges name no certifier at all.
Questions people type about this
Six queries, including the two that bring most readers here, answered off the supplied material and the arithmetic above.
what does md5 identical mean for a photo
It means the two files are the same file. MD5 is computed from every byte in order, so a match is not a judgement about whether two pictures look alike — it is a statement that the bytes are the same bytes in the same sequence. Change one pixel, re-save at a different quality, crop a millimetre, and the digest changes completely.
prostacyl reviews
Ten reviews were supplied with this product, each with a portrait, and all ten are reproduced in full on the reviews page. 8 of the 10 portraits are byte-identical to portraits carrying different names, ages and cities on other brands' sites. 2 are not, and that is reported here with the same weight. The ten texts also share a fixed closing rotation with review sets supplied for unrelated products.
is prostacyl legit or a scam
This desk does not publish that verdict, and this page is not evidence for either answer. What it reports is narrower and checkable: 8 of 10 supplied portraits are byte-identical to portraits used under other names elsewhere. Worth holding beside it: this product's label is the most transparent in this series — 9 rows, 9 printed amounts, no proprietary blend. The review block and the label are different documents and they score very differently.
prostacyl complaints
No complaint data for this product exists in any material supplied to this desk, and none is published here. The supplied set is uniformly positive: the lowest of the ten ratings is three stars, and each three- and four-star review raises an objection and settles it within two words. That is a fact about the set, not about any buyer's experience.
Could two different photographs produce the same digest by accident?
Not by accident. MD5 has a 128-bit output, so an accidental collision between two ordinary image files is not something that happens. MD5 is no longer considered safe against somebody deliberately engineering a collision, which is why modern software uses SHA-256, and that weakness is irrelevant here: nobody engineers a collision between two portraits on two marketing pages.
Does the result tell me anything about what is in the capsule?
No. Not one thing. A review block is assembled by whoever writes a listing, and a formula is made by whoever fills the capsules; nothing supplied says they are the same hand. The capsule question is answered separately, from a complete nine-row panel that this product does publish.
References
Two sources are cited here, both opened and read. Neither is about this product and neither mentions it. They are cited for the general point a reader needs in order to weigh a review block at all: that a supplement buyer is entitled to documentation rather than testimony, and that the documentation has rules attached to it.
- U.S. Food and Drug Administration (2026). Dietary Supplement Labeling Guide: Chapter IV, Nutrition Labeling (21 CFR 101.36).
- U.S. Food and Drug Administration (2026). Current Good Manufacturing Practice for Dietary Supplements (21 CFR Part 111).
The checksum result itself needs no citation, which is the useful thing about it. It rests on thirty-two characters a file and a command any reader can run. The ingredient pages carry the scientific and regulatory references, because that is where claims of that kind are made.
Read the panel before you decide
Sixty capsules, two a day, thirty days a bottle. The Supplement Facts panel declares nine ingredients and nine amounts, with no proprietary blend — the most transparent label in this series. Four of those nine rows change meaning once the arithmetic is done, and all four sums are shown in full. One bottle is $69; six are $49 each. The refund window is printed as 60 days in one place and 90 in another.
- 60 or 90 days — the page prints both
- Nine ingredients, nine printed amounts, no blend
- Returns to 1370 Avenue of the Americas, Floor 4, New York, NY 10019, USA
Prices as printed on the sales page, as of October 12, 2026: one bottle $69, six bottles $49 each with free shipping. The three-bottle total is not published, so it is left blank rather than estimated. The refund window is printed as 60 days in one place and 90 in another — confirm it at the checkout. Questions first? Every published contact route is here.
Keep reading
Authorship and review
Who wrote and checked this page
What this page was checked against
- The label artwork, read at 2× and transcribed character for character. Where the label and the marketing disagree, the label is printed.
- The seller pack, quoted rather than paraphrased, and identified as marketing wherever it is used.
- The published sources listed in the references on this page. Every one was opened and read; none is cited from memory.
- The arithmetic, shown in full. Every amount on this panel is printed, so the figures here are conversions of printed amounts with the working given, never ceilings and never estimates.
- Nothing else. Any fact that was not supplied is recorded as not published rather than filled in.
Last updated October 12, 2026. A highlighted slot is a value no human has supplied yet. Who reviews these pages?