PlainVitamins

Z-Tropin

by Musclegen Performance Nutrition · capsule · 60 capsules

  • On the market (NIH)
  • UPC 6 08766 10021 9
  • DSLD label 213610
  • Serving 2 capsules
  • 30 servings

Z-Tropin by Musclegen Performance Nutrition lists 7 ingredients, 7 with an amount per serving of 2 capsules, such as 400 mg of L-arginine, 300 mg of L-ornithine, 100 mg of L-lysine and 300 mg of L-glutamine. Its current label entered the NIH Dietary Supplement Label Database on February 26, 2020.

What is in Z-Tropin?

Each row as the label prints it, per serving of 2 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).

Z-Tropin: Supplement Facts rows against the market (DSLD label 213610, January 2026 release)
IngredientAmount% DVAmong products listing it
L-ArginineL-Arginine Note: as free form400 mgArginine in Z-Tropin against 1,455 products400 mg per serving; the middle half of products list 167 mg to 1,000 mg, the median 500 mg.400 mg

60% of 1,455 products listing arginine give more (median 500 mg).

L-OrnithineL-Ornithine Note: as free form300 mgOrnithine in Z-Tropin against 258 products400 mg per serving; the middle half of products list 100 mg to 900 mg, the median 400 mg.400 mg

45% of 258 products listing ornithine give more (median 400 mg).

L-LysineL-Lysine Note: as free form100 mgLysine in Z-Tropin against 1,250 products100 mg per serving; the middle half of products list 148.25 mg to 996.25 mg, the median 500 mg.100 mg

78% of 1,250 products listing lysine give more (median 500 mg).

L-GlutamineL-Glutamine Note: as free form300 mgGlutamine in Z-Tropin against 1,850 products0.3 g per serving; the middle half of products list 0.356 g to 3 g, the median 1 g.0.3 g

75% of 1,850 products listing glutamine give more (median 1 g).

Colostrum200 mgColostrum in Z-Tropin against 216 products200 mg per serving; the middle half of products list 250 mg to 1,200 mg, the median 800 mg.200 mg

77% of 216 products listing colostrum give more (median 800 mg).

L-Ornithineas L-Ornithine Alpha-KetoglutarateL-Ornithine (Form: as AKG)100 mg
L-GlycineL-Glycine Note: as free form100 mgGlycine in Z-Tropin against 1,078 products100 mg per serving; the middle half of products list 100 mg to 846 mg, the median 300 mg.100 mg

64% of 1,078 products listing glycine give more (median 300 mg).

Source: NIH ODS Dietary Supplement Label Database, label 213610 (entered February 26, 2020), 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?

Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.

The NIH database records one serving a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.

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 Z-Tropin'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.

Directions
Suggested Use: 2 capsules daily or as directed by a healthcare professional.
Warnings
Caution: Do not exceed recommended dose. Discontinue use immediately if nausea, sleeplessness, or nervousness occur. Do not take this product if you have a known medical condition including high blood pressure, diabetes, any cardiovascular disorder, heart disease, hyperthyroidism, or are taking antidepressant medications. If you have questions about the advisability of taking this product, consult your physician prior to use.
This product is not intended for pregnant or nursing mothers, children under the age of 18, or individuals taking prescription drugs.
This product is manufactured and packaged in a facility which may also process milk, soy, wheat, egg, peanuts, tree nuts, fish and crustacean shellfish.
Allergens and what it does not contain
Contains no yeast, no preservatives, no artificial colors or flavors.

Source: label statements in DSLD label 213610.

What else is on the label?

Other ingredients: Gelatin, Magnesium Stearate, Silicon Dioxide.

How many labels does Z-Tropin have?

One label is on file, entered on February 26, 2020.

  1. Label 213610 (current) Entered February 26, 2020 · on the market · 60 capsules · UPC 6 08766 10021 9

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

Who makes it?

The label names Musclegen Research, Inc (manufacturer), Cary, NC. All Musclegen Performance Nutrition products.

Where next?