Vitamins A, B and zinc
Vitamins A, B and Zinc in Quietum Plus: Amounts and Limits
Vitamins A, B and zinc sit together on tile 8 of the Quietum Plus sales page, and no amount is printed for any of them. The page does not say which B vitamin it means. Adult upper limits exist for vitamin A (3,000 mcg RAE) and zinc (40 mg), and a Cochrane review found no evidence that zinc helps tinnitus.
Written by the Quietum Plus label deskUpdated
01Tile 8
How much vitamin A, B and zinc is in Quietum Plus?
Unknown. The sales page names the three nutrients and prints no amount for any of them.
Quietum Plus does not print how much vitamin A, vitamin B or zinc a capsule holds. The sales page shows them on one tile (Quietum Plus sales page), with a vendor graphic of a gold zinc bubble and two small bubbles marked A and B. The image is decoration, not a measurement.
The bottle front lists no ingredient at all. We have seen no Supplement Facts panel, so there is no %DV and no form to read. Vitamin A could be retinol or beta-carotene, and zinc could be one of several salts. Those differ in how the body handles them.
These are the only three nutrients with a published adult upper limit. That makes the missing amounts matter more here than for the herbs.
| Name on the sales page | Vitamin A |
|---|---|
| What it is | Fat-soluble vitamin (form not printed) |
| Sales-page tile | Tile 8, no claim of its own |
| Group (ours) | Vitamins and zinc |
| Amount in a capsule | Not printed |
| Usually sold or studied for | Needed for vision and immunity |
| Research on hearing or tinnitus | No tinnitus trials in our sources |
| Main caution | Too much preformed vitamin A can cause birth defects and liver problems; adult upper limit 3,000 mcg RAE a day from all sources. |
| Name on the sales page | Vitamin B |
|---|---|
| What it is | "Vitamin B": the page does not say which B vitamin or how much |
| Sales-page tile | Tile 8, no claim of its own |
| Group (ours) | Vitamins and zinc |
| Amount in a capsule | Not printed |
| Usually sold or studied for | B vitamins support nerves and blood |
| Research on hearing or tinnitus | No tinnitus trials in our sources; B vitamins did not improve thinking in healthy adults |
| Main caution | Which B vitamin is not printed; vitamin B6 has an upper limit of 100 mg a day. Do not stack B products without asking. |
| Name on the sales page | Zinc |
|---|---|
| What it is | Essential mineral (form not printed) |
| Sales-page tile | Tile 8, no claim of its own |
| Group (ours) | Vitamins and zinc |
| Amount in a capsule | Not printed |
| Usually sold or studied for | Needed for immunity and wound healing |
| Research on hearing or tinnitus | A Cochrane review found no evidence that zinc helps tinnitus |
| Main caution | Adult upper limit 40 mg a day from all sources; 50 mg or more a day can lower copper. Some antibiotics need spacing from zinc. |
02Upper limits
What are the adult upper limits for vitamin A, B6 and zinc?
Vitamin A: 3,000 mcg RAE a day of preformed vitamin A. Zinc: 40 mg a day. Vitamin B6: 100 mg a day.
An upper limit is the most a healthy adult can take each day, from food and supplements together, without a known rise in harm. It is a ceiling, not a target.
Because Quietum Plus prints no amounts, we cannot tell how close one capsule gets to any of these ceilings. Add your multivitamin, a fortified cereal and any other supplement, and the total can pass them without notice.
| Nutrient | Upper limit | Main concern above it | Quietum Plus amount |
|---|---|---|---|
| Vitamin A (preformed) | 3,000 mcg RAE (NIH ODS, Vitamin A) | Birth defects; liver changes | Not printed |
| Vitamin B6 | 100 mg (NIH ODS, Vitamin B6) | Nerve damage with long, high intake | Not printed |
| Vitamin B12 | None set (NIH ODS, Vitamin B12) | Low toxicity; absorption varies | Not printed |
| Zinc | 40 mg (NIH ODS, Zinc) | Low copper at 50 mg a day or more | Not printed |
03Vitamin B
Which B vitamin does the sales page mean?
The sales page does not say. It writes "Vitamin B" (Quietum Plus sales page), and the B group has eight members. B6 and B12 are the two most often sold alone, and they behave very differently.
B6 has an upper limit of 100 mg a day, and long, high intake can damage nerves (NIH ODS, Vitamin B6). B12 has no set limit because its toxicity is low, but the body absorbs less of it as the dose rises (NIH ODS, Vitamin B12). Some stomach-acid medicines and metformin lower B12 absorption.
A large Cochrane review of folic acid, B12 and B6 found they probably have little or no effect on thinking in healthy adults over 40 (Cochrane, Vitamins and Minerals for Cognition). Quietum Plus is sold for a clear mind, so that result matters. Ask the order desk, or read your bottle, to learn which B vitamin is inside.
04Vitamin A
Can too much vitamin A harm hearing or pregnancy?
Too much preformed vitamin A can harm pregnancy. Intakes above 3,000 mcg RAE a day, and some retinoid medicines, can cause birth defects (NIH ODS, Vitamin A). People who are pregnant or may become pregnant should be told to stay under that limit from supplements.
The same source links the limit to liver changes. It says nothing about hearing, and we found no trial that connects vitamin A to tinnitus. So the case for caution is about pregnancy and the liver, not the ears.
If you take a prescription retinoid for the skin, ask your doctor before any vitamin A product. Do not add a second vitamin A supplement on top of Quietum Plus.
Quietum Plus: from $49 a bottle60 capsules a bottle · 2, 3 or 6 bottles · 60-day money-back guarantee
See packs05Zinc
Does zinc help tinnitus, and can it cause copper deficiency?
No evidence that it helps tinnitus. And yes, 50 mg or more a day can lower copper.
A Cochrane review of three trials in 209 adults found no evidence that zinc improves tinnitus (Cochrane, Zinc for Tinnitus). After four months, 5% of the zinc group and 2% of the placebo group reported improvement, a gap too small to mean anything. The trials had a moderate to high risk of bias.
The 2014 US tinnitus guideline goes further and recommends against zinc and other supplements for persistent, bothersome tinnitus (AAO-HNSF Tinnitus Guideline 2014). The 2026 update keeps the advice not to recommend supplements (AAO-HNSF Tinnitus Update 2026).
Zinc at 50 mg a day or more, taken for weeks, can impair copper absorption and leave copper low (NIH ODS, Zinc). Quinolone and tetracycline antibiotics bind zinc in the gut, so the dose times need spacing. Ask your pharmacist if you take either type.
If you take Quietum Plus because you worry about low B12 or zinc, ask your doctor for a blood test. A test tells you what a label cannot.
06Testing
Should I test B12 before taking B vitamins for ringing in the ears?
Yes, ask about a test first if you think you are low. B12 deficiency can cause tiredness, numbness and tingling in the hands and feet, and changes in thinking (NIH ODS, Vitamin B12). A doctor can check it with a blood test and treat it properly.
Taking a B vitamin in a mixed capsule is a poor way to find out. The amount is unknown, and a supplement may hide a problem that needs care.
When ringing is a doctor question, not a supplement question
Sudden hearing loss in one ear (same day), ringing that beats with your pulse, ringing after a head injury, or ringing with dizziness, weakness or a drooping face. Call 911 for sudden weakness or a drooping face. Sources: NIDCD on sudden deafness (NIDCD, Sudden Deafness), the NHS (NHS, Tinnitus), Mayo Clinic (Mayo Clinic, Tinnitus) and the tinnitus guideline (AAO-HNSF Tinnitus Guideline 2014).
See the side effects page for the risk notes on all 18 ingredients, and the label page for what is missing from the bottle.
08FAQ
Vitamins A, B and zinc questions
How much vitamin A, B and zinc is in Quietum Plus?
Unknown. The sales page names vitamin A, vitamin B and zinc and prints no amount for any of them (Quietum Plus sales page). Read the Supplement Facts panel on your own bottle, and call the order desk if it shows no panel.
Which B vitamin does the sales page mean?
The page writes only "Vitamin B" (Quietum Plus sales page). The B group has eight vitamins, and B6 and B12 act very differently, so the form and amount stay unknown until your bottle's label or the maker says.
Can too much vitamin A harm hearing or pregnancy?
Too much preformed vitamin A can cause birth defects, and the upper limit is 3,000 mcg RAE a day (NIH ODS, Vitamin A). We found no source that links it to hearing. If you may be pregnant, ask your doctor first.
Does zinc help tinnitus?
No evidence says so. A Cochrane review of three trials found no benefit from oral zinc for tinnitus (Cochrane, Zinc for Tinnitus), and the US guideline recommends against zinc for persistent, bothersome tinnitus (AAO-HNSF Tinnitus Guideline 2014).
Can zinc cause copper deficiency?
Yes. Zinc at 50 mg a day or more, taken over several weeks, can impair copper absorption and lower copper status (NIH ODS, Zinc). The adult upper limit from all sources is 40 mg a day, and Quietum Plus prints no zinc amount.
Should I test B12 before taking B vitamins for ringing in the ears?
Ask your doctor for a blood test if you suspect low B12. Deficiency can cause numbness and tiredness (NIH ODS, Vitamin B12), while B vitamins have not been shown to treat tinnitus. A test is better than a guess.
09Who wrote this
Written and reviewed by
Pages built from the bottle images, the sales page and linked NIH, NIDCD, FDA, FTC and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is run by Goquietumplus, a USA Authorized Quietum Plus Retailer, not by the manufacturer. We earn money when you buy through our order links.
Keep reading
More about Quietum Plus
USA Authorized Quietum Plus Retailer
Ready to try Quietum Plus?
Read the label, check your medicines with your doctor, then pick a pack. Bigger packs cost less per bottle, and the 60-day guarantee covers every pack.
- Secure BuyGoods checkout
- 60-day money-back guarantee
- Ships from the U.S.
