PlainVitamins

Zytenz

by Synergistic Nutritional Compounds · capsule · 84 capsules

  • Off the market since November 2023 (NIH)
  • UPC 7 36211 96963 7
  • DSLD label 36632
  • Serving 3 capsules
  • 28 servings

Zytenz by Synergistic Nutritional Compounds lists 13 ingredients, 13 with an amount per serving of 3 capsules, such as 30 mg of niacin, 10 mg of vitamin B6, 100 mg of magnesium and 15 mg of zinc. Its current label entered the NIH Dietary Supplement Label Database on August 26, 2014.

What is in Zytenz?

Each row as the label prints it, per serving of 3 capsules. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).

Zytenz: Supplement Facts rows against the market (DSLD label 36632, January 2026 release)
IngredientAmount% DVAmong products listing it
Niacin30 mg150%Niacin in Zytenz against 12,413 products30 mg per serving; the middle half of products list 13.2 mg to 48 mg, the median 20 mg.DV 16 mgUL 35 mg30 mg

Higher than 63% of 12,413 products listing niacin (median 20 mg).

Vitamin B6as Pyridoxine10 mg500%Vitamin B6 in Zytenz against 15,277 products10 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg10 mg

Higher than 55% of 15,277 products listing vitamin B6 (median 6 mg).

Magnesiumas Magnesium OxideMagnesium (Form: as Magnesium Oxide)100 mg25%Magnesium in Zytenz against 14,003 products100 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg100 mg

Higher than 51% of 14,003 products listing magnesium (median 86 mg).

Zincas Zinc Amino Acid ChelateZinc (Form: as Zinc AAC)15 mg100%Zinc in Zytenz against 13,186 products15 mg per serving; the middle half of products list 5 mg to 15 mg, the median 11 mg.DV 11 mgUL 40 mg15 mg

Higher than 56% of 13,186 products listing zinc (median 11 mg).

D-Aspartic Acid1,200 mgD-Aspartic Acid in Zytenz against 134 products1.2 g per serving; the middle half of products list 1 g to 3 g, the median 2.3 g.1.2 g

69% of 134 products listing D-aspartic acid give more (median 2.3 g).

Tribulus terrestrisas SaponinsTribulus terrestris (Form: 40% Saponins) Genus: Tribulus Species: terrestris300 mgTribulus in Zytenz against 555 products300 mg per serving; the middle half of products list 100 mg to 750 mg, the median 300 mg.300 mg

46% of 555 products listing tribulus give more (median 300 mg).

Arginine Ethyl Ester300 mgArginine in Zytenz against 1,455 products300 mg per serving; the middle half of products list 167 mg to 1,000 mg, the median 500 mg.300 mg

64% of 1,455 products listing arginine give more (median 500 mg).

Catauba50 mgCatuaba in Zytenz against 70 products50 mg per serving; the middle half of products list 56.35 mg to 983 mg, the median 150 mg.50 mg

76% of 70 products listing catuaba give more (median 150 mg).

Eurycoma longifolia 100:150 mgEurycoma Longifolia in Zytenz against 496 products50 mg per serving; the middle half of products list 75 mg to 212.47 mg, the median 100 mg.50 mg

77% of 496 products listing eurycoma longifolia give more (median 100 mg).

Vitex agnus-castus50 mgChastetree in Zytenz against 386 products50 mg per serving; the middle half of products list 50 mg to 240 mg, the median 100 mg.50 mg

61% of 386 products listing chastetree give more (median 100 mg).

Mucuna pruriens50 mgCowhage in Zytenz against 417 products50 mg per serving; the middle half of products list 60 mg to 400 mg, the median 125 mg.50 mg

75% of 417 products listing cowhage give more (median 125 mg).

Avena sativaAvena sativa Genus: Avena Species: sativa Note: 10:15 mg
Maca5 mgMaca in Zytenz against 728 products5 mg per serving; the middle half of products list 118.13 mg to 600 mg, the median 250 mg.5 mg

98% of 728 products listing maca give more (median 250 mg).

ResveratrolResveratrol Note: 20%5 mgResveratrol in Zytenz against 1,123 products5 mg per serving; the middle half of products list 20 mg to 125 mg, the median 50 mg.5 mg

89% of 1,123 products listing resveratrol give more (median 50 mg).

Source: NIH ODS Dietary Supplement Label Database, label 36632 (entered August 26, 2014), version 9.4.0. See the label on DSLD. Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.

Is that a lot?

The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:

  • 76% of the 70 products that print an amount of catuaba list more than its 50 mg of catauba (filed by NIH under catuaba) (median 150 mg).
  • 98% of the 728 products that print an amount of maca list more than its 5 mg of maca (median 250 mg).
  • 89% of the 1,123 products that print an amount of resveratrol list more than its 5 mg of resveratrol (median 50 mg).

The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.

Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.

Which products have the closest formulas?

The products whose ingredient lists overlap most with Zytenz's, rare ingredients counting for more.

Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.

What does the label say about taking it?

Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.

Warnings
WARNING: This product is intended to be used by men who are healthy enough for sexual activity.
Consult your physician before use if you are taking any medications, or have been diagnosed with or have a family history of any medical condition.
Discontinue using this product and consult your physician if any adverse reactions occur. Do not exceed recommended dosage. Discontinue use two weeks prior to surgery.
Storage
Recommended Use: Take 3 capsules with dinner or take up to 6 capsules 30 minutes before physical activity.

Source: label statements in DSLD label 36632.

What else is on the label?

Other ingredients: Gelatin.

How many labels does Zytenz have?

One label is on file, entered on August 26, 2014.

  1. Label 36632 (current) Entered August 26, 2014 · off the market November 9, 2023 · 84 capsules · UPC 7 36211 96963 7

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names Synergistic Nutritional Compounds (distributor), Orem, UT, U.S.A.. All Synergistic Nutritional Compounds products.

Where next?