NOW TestoJack 200
Brand: NOW · Form: CAPSULE [E0159]
Our assessment
The evidence shows that NOW TestoJack 200 contains calcium as a key ingredient. For most adults, calcium is essential for bone health, but the data does not provide specific evidence that this product effectively boosts testosterone levels. Our assessment is that you should not rely on this supplement for hormone support without consulting your healthcare provider.
How it works
Calcium supports bone mineralization by helping deposit minerals into your skeleton, and it plays a role in neuromuscular relaxation for proper nerve signaling and muscle function [NIH ODS]. Think of it as a structural building block for your bones rather than a direct hormone modulator.
Safety profile
FDA has received a total of 592,059 adverse event reports across all supplements. For calcium specifically, high intakes may increase the risk of heart disease and prostate cancer [NIH ODS]. Side effects from excessive calcium include constipation, nausea, weight loss, extreme tiredness, frequent urination, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS]. Calcium can also reduce the absorption of medications such as bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].
Our recommendation
Data not available on the exact dosage of calcium in NOW TestoJack 200. We recommend you get your calcium from food sources first and avoid exceeding 2,500 mg total daily from all sources unless directed by your doctor. If you take thyroid medication or antibiotics, separate calcium intake by at least 2 hours [NIH ODS]. Always speak with your pharmacist about potential interactions before starting any new supplement.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | NOW |
|---|---|
| Serving Size | |
| Contents | 60.0 Veg Capsule(s) |
| Market Status | Off Market |
How to Read This Label
Supplement labels contain several key sections regulated by the FDA:
- Serving Size — The recommended amount per dose. Always check this — some products require multiple capsules per serving.
- Amount Per Serving — Shows the quantity of each nutrient in the product, typically in IU (International Units), mg (milligrams), or mcg (micrograms).
- % Daily Value (%DV) — Indicates how much a nutrient in a serving contributes to a daily diet. 5% DV or less is low; 20% DV or more is high.
- Other Ingredients — Lists inactive ingredients like fillers, binders, and capsule materials (e.g., gelatin, cellulose, magnesium stearate).
- Suggested Use — The manufacturer's recommended directions for taking the supplement, including timing and dosage.
Source: FDA Dietary Supplement Labeling Guide