Safety
Maxorin side effects and safety
The most important page on this site, organised around one distinction: what can be checked, and what cannot. Two of the eight ingredients fall on one side of that line. Six fall on the other.
The label carries the fullest caution block in this batch, quoted below in full. Niacin at 20 mg and zinc at 11 mg sit below their published upper limits with room to spare, and for both the practical risk is this capsule added to something else you already take. For the six ingredients in the 570 mg blend, no safety statement is possible at all. This page does not fill that gap with a symptom list.
The caution block, in full
Start with what the label does say, because it does it better than most — the fullest caution block in this batch, transcribed without alteration:
“Do not exceed recommended dose. Not for use for those under the age of 18 or pregnant or nursing mothers. Consult with a physician prior to use especially if you are taking a medication or have a medical condition.”
The caution block, transcribed from the Maxorin label artwork
Four exclusions and an instruction, in three sentences: under-18s, pregnant and nursing mothers, anyone on a medication or with a medical condition told to consult a physician first, and a do-not-exceed line. None of that was required. Three further lines complete the set:
- KEEP OUT OF REACH OF CHILDREN.
- DO NOT USE IF SAFETY SEAL IS DAMAGED OR MISSING. — which makes the seal a safety instruction rather than packaging, and gives a buyer something to check on the doorstep.
- STORE IN A COOL, DRY PLACE., expanded elsewhere on the artwork to Store this product in a cool dry place below 30°C (86°F).
The dose instruction is unambiguous: “As a dietary supplement, take one (1) capsule daily.”
The credit, and the limit of it
A caution block can only warn about what is disclosed, and this one does that thoroughly. What it cannot do is help a clinician check this formula against anything else, because for 95% of the capsule by weight there is no amount to check.
Niacin: 20 mg, and which niacin
The row reads Vitamin B3 (as Niacin) — 20 mg — 125%. The percentage is arithmetically correct: the FDA’s Daily Value is 16 mg, and 20 divided by 16 is 125% exactly. The amount sits below the NIH’s Tolerable Upper Intake Level from supplements, 35 mg. The published threshold that matters here is flushing, and the NIH states it precisely:
“Thirty to 50 mg or more nicotinic acid typically causes flushing; the skin on the patient’s face, arms, and chest turns a reddish color because of vasodilation of small subcutaneous blood vessels.”
NIH Office of Dietary Supplements — Niacin, Health Professional Fact Sheet
At 20 mg this capsule is below that threshold, so on the amount alone flushing would not be expected from this product by itself. The complication is a disclosure one. The row says as Niacin, and “niacin” covers two compounds that behave differently: nicotinic acid, which the quotation is about, and niacinamide, which does not. The label does not say which is in the capsule.
At 20 mg that distinction is unlikely to matter alone, which is why it is finding 4 rather than finding 1. It matters when something is added: a buyer taking this alongside a B-complex adds an unknown form of niacin to a known one, with 15 mg of headroom.
The NIH notes the flush can be accompanied by burning, tingling and itching, and sometimes by headache, rash, dizziness or a fall in blood pressure. None is expected at 20 mg, and this site will not extend the list beyond what that source publishes.
Zinc: 11 mg, and the form it is in
The row reads Zinc (as Zinc Oxide) — 11 mg — 100%. Correct again: the FDA’s Daily Value for zinc is 11 mg, and the Tolerable Upper Intake Level for adults is 40 mg, a long way above. Two rows, two accurate percentages. The form is stated, which is good practice, and it is the part worth knowing about. The NIH compares them directly:
“Absorption of zinc from supplements that contain zinc citrate or zinc gluconate is similar, at approximately 61% in young adults; the absorption from supplements that contain zinc oxide is 50%.”
NIH Office of Dietary Supplements — Zinc, Health Professional Fact Sheet
That is a note about value rather than safety: 50% against approximately 61% makes the oxide the least absorbed of the common forms. A Daily Value percentage always describes content rather than uptake, so nothing irregular is happening.
On safety the published figure is about sustained high intake, again the NIH’s: doses of 50 mg or more, taken for weeks, “can interfere with copper absorption (which can cause low copper status), reduce immune function, and lower HDL cholesterol levels”.
At 11 mg this product is nowhere near that. The practical point is the same as for niacin: 11 mg plus a multivitamin plus a second zinc supplement is a total nobody tracks, and the ceiling is 40 mg.
The blend: what cannot be said
No safety statement is possible for the six ingredients in the 570 mg blend. There is no published amount for any of them, and for four of the six no monograph. A safety statement requires a substance, an amount and a published finding; six of the eight rows on this label supply the first and nothing else.
The blend names L-citrulline, L-carnitine, pine bark (Pinus pinaster), maca root (Lepidium meyenii), grape skin (Vitis vinifera) and saffron stigma extract (Crocus sativus). Species and plant part for all four botanicals is careful labelling. Then:
- No individual amount is printed for any of the six. One total, 570 mg, about 95% of the 601 mg in the capsule.
- Four of the six return no monograph at the NIH Office of Dietary Supplements or at NCCIH under the names printed: L-citrulline, pine bark, maca and saffron. Absence of a monograph is absence of information — not a finding of safety, and not a finding of harm.
- One is named by a plant part the available monograph does not cover. The label says grape skin; the NCCIH page is about grape seed. Its advice — guidance about the seed, quoted for what it is — is to talk with a health care provider before using it alongside any medicine, and that little is known about use in pregnancy or breastfeeding.
- None of the four botanicals carries a standardisation. An extract without one is a weight of unspecified concentrate.
The descending-order rule forces a ceiling on each of the six — 570, 285, 190, 142.5, 114 and 95 mg by position. A ceiling cannot support a safety statement either: a blend can be one ingredient at 565 mg and five at a milligram each, and this label would look identical. The full table is on the label page.
So this page publishes no symptom list for the blend. Inventing one would attribute effects to ingredients whose amounts are unpublished and whose files are, for four of them, empty.
The one ingredient with a real file
L-carnitine is the exception, and the news is reassuring — worth saying, because a page like this is worthless if it can only say no. Listed second, it cannot exceed 285 mg. The NIH records that doses of around 3 grams a day “can cause nausea, vomiting, abdominal cramps, diarrhea, and a fishy body odor”: the ceiling here is roughly a tenth of that, and the true amount is at or below it. So the one blend ingredient with a substantial file is also the one furthest from where side effects are recorded, and the least of the concerns on this page.
The same fact sheet carries the sentence that matters more, about need rather than harm: “Healthy children and adults do not need to consume carnitine from food or supplements because the liver and kidneys synthesize sufficient amounts to meet daily needs.”
- NIH Office of Dietary Supplements (2026). Niacin — Health Professional Fact Sheet.
- NIH Office of Dietary Supplements (2026). Zinc — Health Professional Fact Sheet.
- NIH Office of Dietary Supplements (2026). Carnitine — Health Professional Fact Sheet.
- National Center for Complementary and Integrative Health (2026). Grape Seed Extract.
The practical risk is stacking
| Nutrient | This capsule | Daily Value | Upper limit | Headroom |
|---|---|---|---|---|
| Vitamin B3 (as niacin) | 20 mg | 16 mg | 35 mg | 15 mg. A B-complex or a fortified drink can close that alone |
| Zinc (as zinc oxide) | 11 mg | 11 mg | 40 mg | 29 mg. Two zinc-containing products get there faster than most expect |
Neither figure is a threshold of injury; an Upper Intake Level describes habitual intake unlikely to cause adverse effects. But it is the published ceiling, and the only person who can add up what you take is you. The label cannot: it does not know what else is in the cupboard.
The second version of the problem has no solution. If you already take a product containing any of the six blend ingredients, you cannot work out the combined amount. That is not a warning about an interaction; the calculation simply cannot be performed.
The sentence on the label is the right one
“Consult with a physician prior to use especially if you are taking a medication or have a medical condition.” Bring the bottle to the appointment: the panel is what a clinician will want to see, including the parts of it that are blank.
What this label does not publish
A safety page should end with the things a buyer cannot check.
- The amount of each of the six blend ingredients — 95% of the formula by weight.
- A standardisation for any of the four botanicals.
- Which form of niacin the 20 mg is: nicotinic acid or niacinamide.
- Any monograph for L-citrulline, pine bark, maca or saffron, and none for grape skin. The one that exists is about the seed.
- A country of manufacture. The supplied seal says foreign and domestic ingredients; the artwork names no country.
- A certifying body for the GMP mark, and a registration number for the FDA-registered-facility mark. Both are examined on the testing page.
- A Certificate of Analysis document. A reference exists; the file does not. It is the most useful thing a buyer could ask for, because a CoA reports per-ingredient quantities and would resolve the blend.
And the disclaimer the label prints in full, which governs every sentence here: “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.”
Nothing here is medical advice. If you take a prescription medicine, live with a condition, are pregnant or nursing, or are under 18, the label’s own caution block has already answered the question.
Read the blend row first, then decide
Thirty capsules, one a day. Two named nutrients with percentages that both check out, and then 570 of the 601 milligrams in the capsule inside a proprietary blend with no amounts on it. The live price and the 60-day return terms are both on the seller’s checkout screen.
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