Safety
Prostacyl safety: what the label does right, and three numbers
This is the most careful page on this site, and it starts with credit rather than with a warning, because the credit is the reason the rest of the page can exist. This label carries a complete caution block, correct storage lines and the full FDA disclaimer, and it prints an amount for every one of its nine ingredients. Three of those amounts are worth a reader’s attention. None of the three is an alarm.
The label does the safety basics properly: a complete caution block, storage lines and the FDA disclaimer in full. Three printed figures are worth seeing: B6 at 13.8 mg against a US limit of 100 mg and EFSA’s 12 mg, boron at 10 mg against a 20 mg limit, and vitamin E at 25 mg against 1,000 mg. Every one sits inside or near a published limit.
- Caution block
- Complete and printed on the label
- Storage lines
- Printed, all three
- FDA disclaimer
- In full and in capitals
- Panel rows
- 9, every one with an amount
- B6 in one serving
- 13.8 mg · 812% DV
- Boron in one serving
- 10 mg · half the 20 mg limit
- Vitamin E in one serving
- 25 mg · limit 1,000 mg
- Trials of the finished product
- None supplied
What the label does right
A safety page in this series usually opens by reporting that there is no caution block to transcribe. This one opens by transcribing it, because it exists, it is complete, and it is printed on the bottle rather than left to a sales page.
“Do not exceed recommended dose. Pregnant or nursing mothers, children under the age of 18, and individuals with a known medical condition should consult a physician before using this or any dietary supplement.”
The caution block on the Prostacyl label
This caution block is complete and correctly drafted. It names a dose limit and the four groups who should ask first, and it is printed on the label rather than left to the sales page. That is worth saying plainly, because a great many labels this desk has read do not manage it.
Two more sets of lines belong beside it. The storage and safety lines read KEEP OUT OF THE REACH OF CHILDREN. DO NOT USE IF SAFETY SEAL IS DAMAGED OR MISSING. STORE IN A COOL, DRY PLACE. All three are correctly drafted: a child-safety line, a seal-integrity line and a storage instruction, which together are what a buyer needs to know about keeping the bottle. And the FDA disclaimer is printed in full and in capitals, which is the sentence the whole category turns on and the one most often trimmed.
“These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.”
Printed on the Prostacyl label in full and in capitals
| Detail | What we were actually given |
|---|---|
| Caution block | Printed and complete. Do not exceed recommended dose. Pregnant or nursing mothers, children under the age of 18, and individuals with a known medical condition should consult a physician before using this or any dietary supplement. |
| Do-not-exceed line | Printed. “Do not exceed recommended dose.” |
| Age restriction | Printed. Children under the age of 18 are named, and the directions open with adults. |
| Pregnancy and nursing | Printed. Named in the caution block. |
| Suggested use | As a dietary supplement, adults take two (2) capsules daily. For best results, take with 6-8 oz of water or as directed by a healthcare professional. |
| Storage and safety | KEEP OUT OF THE REACH OF CHILDREN. DO NOT USE IF SAFETY SEAL IS DAMAGED OR MISSING. STORE IN A COOL, DRY PLACE. |
| Other ingredients | Gelatin (capsule), Brown Rice Flour. |
| FDA disclaimer | Printed in full, in capitals, correctly worded. |
| Distributor identity | Printed: Nutrova, Tallmadge, OH 44278, USA |
| Allergen statement | Not published. None appears on the artwork supplied. |
| A certificate of analysis | Not published. A certificate number, P-4126-26-PR, and a lot code, P-26/PR-4126, are supplied. Neither is a document. |
Nine of those eleven rows are printed and complete, and on most products this desk reads the same table comes back nearly empty. That is the context for everything below. The three figures in the next section are visible precisely because this label printed them, and a label that had hidden them behind a proprietary blend would have looked tidier and told you nothing.
Three numbers a reader should be able to see
Here they are in one table: the printed amount, the published limit beside it, and what the comparison comes to. Every figure in the first column is on the label. Every figure in the second is from a named public source, cited at the foot of this page.
| Row, as printed | What one serving is | The published limit | What that comes to |
|---|---|---|---|
| Vitamin B6 as pyridoxine hydrochloride | 13.8 mg, printed at 812% DV | US upper limit 100 mg a day, Food and Nutrition Board. EFSA set 12 mg a day in 2023. | About 14% of the US limit, and about 15% above the European one. Reported neuropathy cases start around 500 mg a day. |
| Boron as boron amino acid chelate | 10 mg, with ** in the Daily Value column, which is correct | Adult upper limit 20 mg a day. Typical total intake from food and supplements about 1.0 to 1.5 mg. | Half the upper limit in one serving, and roughly 6.7 to 10 times a typical total daily intake. |
| Vitamin E as dl-alpha tocopheryl acetate | 25 mg, printed at 167% DV | Adult upper limit 1,000 mg a day. Daily Value 15 mg of alpha-tocopherol. | Far below the limit. The finding on this row is that 167% is printed where about 83% is delivered — an accuracy point, not a safety one. |
Read the fourth column before anything else. Every one of the three sits inside or near a published limit, and the one that is formally over a limit is over the European figure by about 15% while sitting at about 14% of the American one. Nothing in this table is a reason not to buy this product, and a page that presented it as one would be misreading its own evidence.
So why spend a page on them? Because a reader cannot easily see any of the three. The B6 row needs two upper limits from two different bodies before it means anything. The boron row needs a limit that is not printed on the label and a typical-intake figure that is not either. The vitamin E row needs a conversion between two chemical forms. All three are findable, none is on the bottle, and the three sections below do the work one row at a time.
Vitamin B6: two limits that disagree
Start with the credit, because this is the row the label gets exactly right. The panel prints Vitamin B6 (as pyridoxine hydrochloride) 13.8 mg, 812% DV, and the arithmetic checks out: 13.8 divided by the 1.7 mg Daily Value is 811.8%. The form is named. The percentage is correct. Nothing on this row needs a correction.
The figure to put beside it is the upper limit, and there are two of them. The US Food and Nutrition Board sets a Tolerable Upper Intake Level of 100 mg a day, which makes this serving about 14% of it — comfortably clear. The European Food Safety Authority reviewed the same question in 2023, drawing on reviews of sensory peripheral neuropathy, and set an adult limit of 12 mg a day. On that figure this serving is about 15% above the limit.
Both of those sentences are true at once, and the gap between them is not a scandal. It is two expert bodies reading the same literature and drawing the line in different places, which happens across nutrition science and will keep happening. What matters for a reader is the size of the numbers underneath. The neuropathy literature behind both limits concerns much higher chronic intakes: reported cases start around 500 mg a day, and studies at an average of 200 mg a day for up to five years found no evidence of it.
This is a number to see, not a warning
At 13.8 mg a serving, this product is about a seventh of the American limit and about 15% over the European one, against a case literature that begins around 500 mg a day — some thirty-six times this serving. Nobody reading this page needs to be alarmed by the B6 row. What they need is to be able to see it, because the figure that matters is not this one on its own — it is this one plus whatever else they take. The full row, with its sources, is on the ingredients page.
Boron: half the upper limit in one serving
The panel prints Boron (as boron amino acid chelate) 10 mg with ** in the Daily Value column, and both halves of that are correct. The form is named, which for a mineral does the work a standardisation does for a botanical. The double asterisk is right as well: the Food and Nutrition Board found the data insufficient to set a Daily Value for boron, so there is none to print.
There is no Daily Value and there is an upper limit. For adults it is 20 mg a day, and one serving of this product is half of it. That is the figure worth carrying away from this section, and it needs a second figure beside it to mean anything. Median intake from food in the United States runs about 0.87 to 1.35 mg a day, and total intake from food and supplements together about 1.0 to 1.5 mg. So one serving here is roughly 6.7 to 10 times a typical total daily intake.
Now the part that keeps this in proportion. NIH records no adverse effects from supplemental boron doses within the upper limit, and no known clinically relevant drug interactions. Half a limit is not a breach of a limit, and a multiple of a typical intake is not a hazard — typical intake is a description of what people happen to eat, not a recommendation. This row is not an alarm.
Where the boron figure actually bites
One product, one serving, half a limit: fine. Two products, each at this level, taken on the same day: that is the whole adult upper limit, reached without either label ever mentioning the other. Boron turns up in men’s formulas and in joint and bone products, and almost nobody adds it up, because almost no label gives you the limit to add it up against. This one at least gives you the amount. The full row is here, and the stacking section below sets out what to do with it.
Vitamin E: an accuracy finding, not a safety one
This row belongs on a safety page for one reason: to say plainly that it is not a safety row. The conclusion goes first. 25 mg of vitamin E is a long way below the 1,000 mg adult upper limit, and nobody is at risk from it.
What is wrong with the row is the percentage printed beside the amount. The panel declares Vitamin E (as dl-alpha tocopheryl acetate) 25 mg, 167% DV. The arithmetic behind 167% is 25 divided by the 15 mg Daily Value, which is 166.7%. That treats the synthetic form as worth the same per milligram as the natural one, and it is not. The prefix dl- marks it as all rac-alpha-tocopherol, a mixture of all eight stereoisomers of which the body retains four.
NIH’s Office of Dietary Supplements states the conversion in so many words: 1 mg of alpha-tocopherol equals 1 mg of natural RRR-alpha-tocopherol or 2 mg of synthetic all rac. On that conversion the serving supplies 25 ÷ 2 = 12.5 mg of alpha-tocopherol, which is about 83% of the Daily Value rather than the 167% printed — close to half. A second and smaller reduction follows if the 25 mg is the weight of the acetate ester rather than tocopherol equivalents, because the ester is heavier than the free alcohol (472.74 against 430.71 g/mol), which would put the figure nearer 11.4 mg, about 76%. This desk publishes 83% as the headline, because it rests on the conversion ODS states outright.
Say the shape of this finding out loud, because it is easy to file in the wrong drawer. The error runs in the direction that flatters the product: a reader comparing two supplements on their %DV columns would conclude this one supplies twice what it does. That is an accuracy problem and a labelling problem. It is not a risk, and this page will not dress it up as one. The one credit on the row is the one that makes the correction possible: the label named the form. A panel printing only “Vitamin E 25 mg” would leave nobody able to check it. The conversion is set out in full on the label page.
The stacking point, which is where all three matter
Every figure above is harmless on its own and all three change character the moment a second bottle joins them. This is the practical heart of the page, and it applies to a very ordinary reader: somebody who already takes a multivitamin.
The mechanism is arithmetic rather than pharmacology. A multivitamin commonly carries B6. Men’s formulas and bone products commonly carry boron. Nothing on either label mentions the other, nobody adds the two together, and limits are not reached by a single reckless dose so much as by two reasonable ones on the same morning. One serving here is already 812% of the Daily Value for B6 and half the adult upper limit for boron.
- A multivitamin, without adding up the B6. This serving is 812% of the Daily Value on its own. Two sources of the same nutrient is how a limit gets reached quietly, and the European limit of 12 mg a day is already below what one serving here supplies.
- A second product containing boron. One serving is half the 20 mg adult upper limit. Two servings of two different products, each at this level, is the whole limit in a day.
- A separate vitamin E capsule, on the theory that this row is already high. It is not: 25 mg of the synthetic form delivers about 12.5 mg of alpha-tocopherol, roughly 83% of the Daily Value rather than the 167% printed. The upper limit is 1,000 mg, so there is a long way to go — but decide that on the delivered figure rather than on the printed one.
- A second prostate formula, without comparing the panels. Most products in this category print less than this one does. If one of the two bottles has a full panel and the other does not, build the decision on the one that does.
- Anything prescribed, without telling the prescriber. Not because an interaction has been documented for these rows — NIH records none that is clinically relevant for boron within the upper limit — but because the conversation is cheap and a complete panel makes it a short one.
- Anything at all, as a substitute for an appointment. The label’s own caution block says anyone with a known medical condition should consult a physician first. That case is set out on the who-it-is-for page.
Here is what this label does that almost none of its competitors manage, and it is the reason the list above can be written at all. Nine rows, nine printed amounts, no proprietary blend. You can take this panel to a pharmacist and get a real answer, because every number they need is on it. Hand them a label with a blend total and the same conversation ends in a shrug. The panel is transcribed in full here.
If you have a reaction
Seven steps, in order. The last is about something this page deliberately does not give you, and it matters as much as the six above it.
- 01Stop taking itBefore anything else, and at no cost. There is no loading schedule to disrupt and no taper to manage: the label’s own serving is two capsules a day and nothing published argues against simply stopping. Stopping removes the variable.
- 02If it is severe, or breathing or swallowing is affected, get urgent medical helpThat is general advice about anything swallowed rather than a statement about this product, and it is not a judgement a web page should be in the middle of. Emergency care first. The rest of this list afterwards.
- 03Take the panel to whoever prescribes your medicinesThis is the step that does the most good, and on this product it is unusually easy. All nine rows carry a printed amount, so a pharmacist can read the actual figures rather than a list of names. Point at the B6 at 13.8 mg and the boron at 10 mg first, and say what else you take.
- 04Photograph the label wrap, the box and the base of the bottleThe best-before date is printed on the base of the bottle when the bottle shows it; no base shot was supplied, so this desk has not seen one. Whatever is printed there is what an enquiry will ask for, and it stops being available the moment the packaging goes out. While you have the bottle in your hand, check the panel on it against the panel on this site. What to record is listed here.
- 05Write down what you took, when, and what else you were takingDates, the time of day, every other supplement and every medicine, including the ones that feel too ordinary to mention. A reaction account is only as useful as its timeline, and nobody reconstructs a timeline accurately a fortnight later.
- 06Call the order desk, and keep a note of the callThe published number is +1 (302) 200-3480 and the published email is [email protected]. The label carries a third route, [email protected], which belongs to the distributor named on the bottle. Quote the lot code P-26/PR-4126, ask for the lot to be checked, and write down who you spoke to and when.
- 07Do not expect a reporting address from this site, because none was suppliedNone of the sources cited on this site is an adverse-event reporting page. They are FDA labelling and claims pages, NIH fact sheets and ingredient monographs. No reporting body, telephone number or web address for reporting a reaction appears in any document supplied to this desk, so this page prints none rather than printing one from memory. Your prescriber or pharmacist will know where a report goes.
Why the last step is there at all
A reporting address printed from memory is exactly the kind of detail that is worth nothing if it is wrong, and worse than nothing if somebody relies on it. So this page prints none. What it prints instead is the three routes that are published: the order desk on +1 (302) 200-3480, the orders and refunds address [email protected], and the distributor’s own [email protected] on the label. Take the reaction itself to a prescriber or pharmacist, who will know where a report goes. Every published contact route is set out here.
The findings behind this page
Three of the eighteen numbered findings are dose figures, and all three are on this page. Read them in this order: the accuracy one first, because it is the one most often mistaken for a safety point, and then the two upper limits.
02The vitamin E percentage is roughly double what the form delivers
07Vitamin B6 at 13.8 mg clears the American limit and exceeds the European one
08Ten milligrams of boron is half the upper limit in one serving
Questions people actually ask
Ten questions about safety, limits and stacking, phrased the way they are typed. Each answer carries the figure it rests on and names the source. Type to filter.
prostacyl side effects
Nothing specific to the finished product is published, because no trial of it appears in any material supplied. What this label does give you is a complete caution block, correct storage lines, the full FDA disclaimer and nine printed amounts — which is what makes the rest of this page possible. Three of those nine amounts are worth seeing: B6 at 13.8 mg against two different upper limits, boron at 10 mg against a 20 mg limit, and vitamin E at 25 mg against a 1,000 mg limit. All three sit inside or near a published limit.
vitamin b6 812 percent daily value too much
It is a large percentage of a small number: the Daily Value for B6 is 1.7 mg, and 13.8 divided by 1.7 is 811.8%, so the printed 812% is correct. Two upper limits are worth knowing. The US Food and Nutrition Board sets 100 mg a day, so this serving is about 14% of it. EFSA reviewed the same question in 2023 and set 12 mg a day, which this serving is about 15% above. The neuropathy literature behind both limits concerns much higher chronic intakes — reported cases start around 500 mg a day. This is a number to see, not a warning.
is 10 mg boron a day safe
The adult Tolerable Upper Intake Level is 20 mg a day, so one serving is half of it. For scale, total intake from food and supplements runs about 1.0 to 1.5 mg, which makes this roughly seven to ten times an ordinary day. NIH records no adverse effects from supplemental doses within the upper limit and no known clinically relevant drug interactions. The ** the label prints on this row is also correct: no Daily Value has been established for boron. The reason to know the figure is stacking, not risk.
dl alpha tocopheryl acetate vs natural vitamin e
The dl- prefix marks the synthetic all rac form. NIH’s Office of Dietary Supplements converts 2 mg of it to 1 mg of alpha-tocopherol, so the 25 mg printed here supplies about 12.5 mg, or roughly 83% of the Daily Value rather than the 167% printed. Say the important half out loud: the upper limit is 1,000 mg a day, so this is an accuracy finding and not a safety one. The label naming the form is what makes it visible at all.
can i take prostacyl with prescription medication
Ask a pharmacist, and hand them the panel. That is a genuinely different conversation from the one most products in this category allow, because every row here carries a figure: nine ingredients, nine amounts, no proprietary blend. Point at the B6 and the boron, name everything else you take, and let them size it. No interaction data for these botanical rows is cited on this site, and that is an absence rather than a clean bill of health.
what are the warnings on the prostacyl bottle
Three sets of lines, all printed on the label. The caution block: “Do not exceed recommended dose. Pregnant or nursing mothers, children under the age of 18, and individuals with a known medical condition should consult a physician before using this or any dietary supplement.” The storage and safety lines: KEEP OUT OF THE REACH OF CHILDREN. DO NOT USE IF SAFETY SEAL IS DAMAGED OR MISSING. STORE IN A COOL, DRY PLACE. And the FDA disclaimer in full and in capitals. What a label is required to carry, and what this one carries against it, is set out on the label page.
does prostacyl interact with anything
No interaction is documented for these rows in the sources cited on this site, and NIH records no known clinically relevant drug interactions for boron within the upper limit. That is an absence of documented interactions rather than a guarantee of none, and the honest way to use it is as a reason to show a pharmacist the panel rather than as a reason not to bother. The figures that make that conversation short are the two upper-limit rows above.
prostacyl and alcohol or other supplements
Nothing in the supplied material addresses either, and this desk will not fill the gap with a plausible sentence. What it can give you is the stacking arithmetic, which is the part a reader can actually act on: B6 at 812% of the Daily Value and boron at half the adult upper limit in one serving. Add a second bottle containing either and you are doing arithmetic the merchant did not do for you.
is prostacyl fda approved
No, and nothing sold as a dietary supplement is approved before it is marketed. The label says so itself, in full and in capitals: “These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.” One of the badges in the marketing set reads FDA Registered, which means a facility has filed a registration. That is a legal requirement rather than an endorsement, and it says nothing about any product made in the facility.
what should i do if i have a reaction to prostacyl
Stop taking it. If it is severe, or breathing or swallowing is affected, get urgent medical help. Then take the panel to whoever prescribes your medicines, photograph the label and the box, write down what you took and when, and call the order desk on +1 (302) 200-3480. No reporting body or address appears in any document supplied to this desk, so none is printed here; your prescriber will know where a report goes.
References
Three sources carry this page, one for each of the three figures. Every one was opened and read, and every number quoted above comes from the fact sheet beside it rather than from memory.
- National Institutes of Health, Office of Dietary Supplements (2026). Vitamin E: Fact Sheet for Health Professionals.
- National Institutes of Health, Office of Dietary Supplements (2026). Vitamin B6: Fact Sheet for Health Professionals.
- National Institutes of Health, Office of Dietary Supplements (2026). Boron: Fact Sheet for Health Professionals.
The sentence to say to a pharmacist
Hand them the panel and say this: every row carries an amount. Then point at two of them — B6 at 13.8 mg and boron at 10 mg — and say what else you take. That is a two-minute conversation with a real answer at the end of it, and it is possible only because this label printed what most labels in this category do not. The figure to ask them about is not any single row. It is the total across every bottle on your shelf.
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?