Syntheroid
by XPI Xtreme Pharmaceutical Innovations · capsule · 180 capsules
- Off the market since October 2023 (NIH)
- UPC 7 36211 96343 7
- DSLD label 36844
- Serving 3 capsules
- 60 servings
Syntheroid by XPI Xtreme Pharmaceutical Innovations lists 8 ingredients, 8 with an amount per serving of 3 capsules, such as 1,560 mg of D-aspartic acid, 300 mg of fenusterols(R), 300 mg of tribulus terrestris and 100 mg of horny goat weed. Its current label entered the NIH Dietary Supplement Label Database on August 26, 2014.
What is in Syntheroid?
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).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| D-Aspartic Acid | 1,560 mg | 60% of 134 products listing D-aspartic acid give more (median 2.3 g). Per day at the most servings: 3.12 g. | |
| Fenusterols(R)as Steroidal SaponinsFenusterols(R) (Form: 50% Steroidal Saponins) (Alt. Name: Fenugreek seed extract) PlantPart: seed | 300 mg | ||
| Tribulus terrestrisas SaponinsTribulus terrestris (Form: 40% Saponins) Genus: Tribulus Species: terrestris | 300 mg | 46% of 555 products listing tribulus give more (median 300 mg). Per day at the most servings: 600 mg. | |
| Horny Goat Weedas IcariinHorny Goat Weed (Form: 10% Icariin) | 100 mg | 60% of 311 products listing epimedium give more (median 200 mg). Per day at the most servings: 200 mg. | |
| Maca | 100 mg | 75% of 728 products listing maca give more (median 250 mg). Per day at the most servings: 200 mg. | |
| Eurycoma longifolia 20:1 | 100 mg | 44% of 496 products listing eurycoma longifolia give more (median 100 mg). Per day at the most servings: 200 mg. | |
| Boronas Boron CitrateBoron (Form: as Boron Citrate) | 5 mg | Higher than 94% of 3,339 products listing boron (median 1 mg). Per day at the most servings: 10 mg. | |
| BioPerine | 5 mg | 33% of 2,363 products listing black pepper give more (median 5 mg). Per day at the most servings: 10 mg. |
Source: NIH ODS Dietary Supplement Label Database, label 36844 (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:
- Its 5 mg of boron is higher than 94% of the 3,339 boron products that print an amount; 146 list more.
The NIH database records 2 servings 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?
3 products list the very same ingredients; the nearest amounts come first.
- 1-AnderoboldiolMusclecore · off the market same ingredients
- Alpha T1Advantage Pharmaceuticals same ingredients
- TestosynXPI Xtreme Pharmaceutical Innovations · off the market same ingredients
- Total-T UltimateNugenix 6 shared, 54% alike
- Nugenix Ultimate TestosteroneNugenix 5 shared, 44% alike
- UltimateNugenix 5 shared, 44% alike
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
- RECOMMENDED USE: Take 3 capsules twice daily. For best results take first thing in the morning on an empty stomach, and before bedtime.
- Warnings
- WARNING: SYNTHEROID(TM) is only intended to be consumed by healthy male adults 18 years of age and older.
- Do not exceed recommended dose.
- Do not take this product if you have a medical condition(s) including, but not limited to diabetes, heart disease, high or low blood pressure, cardiac arrhythmia, stroke, liver or thyroid disease, psychological discorders, prostate hypertrophy, or hormonal abnormalities.
- Discontinue use two weeks prior to surgery.
- This product should not be used by women, those prone to dehydration, or if you are regularly exposed to excessive heat. Reduce or discontinue use if sleeplessness, tremors, dizziness, nervousness, headaches, or heart palpitations occur.
- Do not use if packaging has been tampered with
- KEEP OUT OF REACH OF CHILDREN.
- Consult with your physician if you are taking antidepressants, MAO inhibitors or other prescription drugs.
- Storage
- Store in a cool, dry place.
Source: label statements in DSLD label 36844.
What else is on the label?
Other ingredients: Gelatin, Silicon Dioxide.
Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): #1 TRAINER RECOMMENDED.
How many labels does Syntheroid have?
One label is on file, entered on August 26, 2014.
- Label 36844 (current) Entered August 26, 2014 · off the market October 2, 2023 · 180 capsules · UPC 7 36211 96343 7
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names XPI(TM) (distributor), Orem, UT, U.S.A.. All XPI Xtreme Pharmaceutical Innovations products.