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Zinc and Niacin for Men: Checking the Two Vigorus Label Doses
Quick answer
Each Vigorus capsule lists 20 mg of niacin (125% DV) and 11 mg of zinc (100% DV). Both sit under the adult upper limits of 35 mg niacin and 40 mg zinc. The 20 mg of niacin is below the 30-50 mg range where flushing usually starts. If you also take a multivitamin, add the two labels together.
What niacin and zinc amounts does the Vigorus label print?
The label prints two exact amounts: 20 mg of niacin and 11 mg of zinc per capsule. These are the only ingredients with a stated dose. The other six share an unbroken 570 mg blend.
Supplement Facts
Serving size: 1 capsule · Servings per container: 30
| Amount per serving | Amount | % Daily Value |
|---|---|---|
| Vitamin B3 (as niacin) | 20 mg | 125% |
| Zinc (as zinc oxide) | 11 mg | 100% |
| Proprietary blendL-Citrulline, L-Carnitine, Pine bark extract, Maca root extract, Grape skin extract, Saffron stigmas extract | 570 mg | Not set |
No Daily Value is set for the blend. The %DV figures are copied as printed on the label. The amount of each blend ingredient is not published. Other ingredients: Hypromellose (vegetable capsule), microcrystalline cellulose, magnesium stearate, silicon dioxide. Allergen statement: not published.
That makes niacin and zinc the easiest part of the formula to judge. You can hold each number up to a public reference and see where it lands. The rest of this post does exactly that, using the NIH fact sheets.
How do the Vigorus doses compare with the RDA and upper limits?
Both amounts sit between the daily target and the safe ceiling for adults. The zinc amount matches the RDA for men. The niacin amount is a little above the RDA but well under its upper limit.
| Nutrient | Vigorus per capsule | RDA, adult men | Upper limit (UL) | Room under the UL |
|---|---|---|---|---|
| Niacin (vitamin B3) | 20 mg | 16 mg NE | 35 mg (from supplements and fortified foods) | 15 mg |
| Zinc | 11 mg | 11 mg | 40 mg (all sources) | 29 mg |
Sources: the NIH niacin fact sheet (NIH ODS) and zinc fact sheet (NIH ODS). The RDA is the amount that covers the needs of most healthy people. The UL is the most you can take daily without a likely risk of harm. It is a ceiling, not a goal.
Note the niacin UL counts supplements and fortified foods, not niacin found naturally in meat or grains. The zinc UL counts every source, including food.
Will 20 mg of niacin in Vigorus cause flushing?
Probably not for most men, though it can happen. Flushing from nicotinic acid, the form of niacin that causes it, usually starts at about 30 to 50 mg (NIH ODS). One capsule is 20 mg.
A flush feels like warmth, redness, itching or tingling on the face, neck and chest. It usually passes on its own. Flushing is the reason the upper limit sits at 35 mg.
Niacin in much larger doses is also a prescription treatment, managed by doctors. That is a separate use at far higher amounts and has nothing to do with a 20 mg capsule.
What does 11 mg of zinc in Vigorus mean for men?
Eleven milligrams is exactly the RDA for adult men, which is why the label shows 100% DV. It is a plain maintenance amount, not a high dose.
Zinc helps hundreds of enzymes work. It plays a role in immune function, wound healing, and the making of proteins and DNA (NIH ODS). Men need a little more than women, whose RDA is 8 mg.
Where zinc can go wrong
Problems come from too much, not from 11 mg. Taking well over the 40 mg ceiling for a long time can lower copper levels and weaken immune function. Short-term high doses can cause nausea, cramps and diarrhea.
Zinc can also get in the way of some medicines. The NIH lists certain antibiotics (quinolones and tetracyclines) and penicillamine as examples. Spacing them apart from a zinc supplement is often advised. A pharmacist can set the timing.
Which foods give you niacin and zinc?
Most men who eat a mixed diet get both nutrients from meals. That matters because the capsule adds to what you already eat, and zinc from food counts toward its 40 mg upper limit.
| Nutrient | Rich food sources | Also found in |
|---|---|---|
| Niacin | Chicken breast, turkey, tuna, salmon, beef, pork | Peanuts, brown rice, fortified cereals and breads |
| Zinc | Oysters (the richest source), beef, crab, lobster, pork | Chicken, beans, nuts, whole grains, fortified cereals, dairy |
Plant foods carry phytates, which bind zinc and cut how much you absorb. Men who eat little or no meat may need more zinc from food than the RDA suggests. People with gut conditions or heavy alcohol use can also run low.
Niacin shortage is rare in the US. Most people get plenty from protein foods and fortified grains.
Can you take Vigorus with a multivitamin?
Often you can, but do the addition first. Many multivitamins already contain niacin and zinc, so the two labels stack on top of each other.
Find both nutrients on your multi
Look for “niacin” or “vitamin B3” and “zinc” on its Supplement Facts panel.
Add the Vigorus amounts
Add 20 mg to the multi's niacin and 11 mg to its zinc.
Compare with the ceilings
Keep supplement niacin at or under 35 mg and total zinc under 40 mg a day.
Count other products
Zinc lozenges, cold remedies, B-complex pills and sports drinks can add more.
Ask when close
If the total is near a limit, ask a pharmacist before you combine them.
| Example multi (hypothetical) | Multi niacin | Total niacin | Multi zinc | Total zinc |
|---|---|---|---|---|
| Multi A | 10 mg | 30 mg (under 35) | 8 mg | 19 mg (under 40) |
| Multi B | 20 mg | 40 mg (over 35) | 15 mg | 26 mg (under 40) |
In the second example, zinc is fine but niacin crosses the ceiling. That is when flushing becomes more likely. Daily-use tips are on the how to use Vigorus page.
What do the niacin and zinc doses tell you about Vigorus overall?
They show the printed part of the label is sensible. Both amounts are modest, match public reference values, and stay under the ceilings.
They do not tell you much about the sales page goals. The sales page says Vigorus is made to support libido, circulation, and healthy testosterone within the normal range. Niacin and zinc at these amounts are ordinary daily nutrients. The botanical ingredients meant to carry those goals sit in the 570 mg blend with no individual amounts.
- Niacin 20 mg and zinc 11 mg are printed, checkable, and under the upper limits.
- Flushing is less likely at 20 mg than at 30-50 mg.
- The blend ingredients have no per-ingredient amounts on the label.
- One capsule a day. Add your multivitamin before you combine.
For the citrulline side of the formula, read L-citrulline explained. For the full panel line by line, see the Vigorus Supplement Facts page.
Niacin and zinc in Vigorus: short answers
Why is niacin listed at 125% DV?
The Daily Value for niacin on labels is 16 mg. The capsule holds 20 mg, which is 125% of that figure. It is still under the 35 mg upper limit.
Will 20 mg of niacin make my skin flush?
It is less likely at this amount. Flushing from nicotinic acid usually shows up around 30 to 50 mg. Some people are more sensitive, and food from other sources adds a little.
Is zinc oxide a good form?
Zinc oxide is a common form in supplements and multivitamins. The label names it, which lets you compare with other products. The label does not publish absorption data.
Can I take Vigorus with my multivitamin?
Often yes, but add up the numbers first. Many multivitamins contain both niacin and zinc. Keep your supplement total under 35 mg niacin and 40 mg zinc a day, and ask a pharmacist if unsure.
Should I take Vigorus with food?
The label only says one capsule a day. Some people find zinc on an empty stomach causes mild nausea, so taking it with a meal is a common habit.
Do I need these nutrients if I eat meat and grains?
Many men already get enough niacin and zinc from food. The capsule's amounts are modest add-ons, not a fix for a poor diet.
References
- NIH Office of Dietary Supplements (accessed 2026). Niacin: Fact Sheet for Health Professionals.
- NIH Office of Dietary Supplements (accessed 2026). Zinc: Fact Sheet for Health Professionals.
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Keep reading
Vigorus Supplement Facts
The facts box rebuilt from the bottle, plus the warnings, storage and contact lines around it.
Read →Daily useHow to Take Vigorus
The dose in numbers, a first-week routine, stacking math for zinc and niacin, and storage rules.
Read →BlogL-Citrulline Explained
A buyer's look at citrulline: what it does, the gram doses in studies, and the 570 mg Vigorus blend.
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