NOW TestoJack 200
Brand: NOW · Form: CAPSULE [E0159]
Our assessment
The evidence shows that NOW TestoJack 200 contains calcium as one of its ingredients. While calcium is essential for bone health, the specific formulation of this product as a testosterone support supplement does not have direct data to support claims of boosting testosterone levels. Our assessment is that the role of calcium in this product is for general mineral support, not for hormonal effects [NIH ODS].
How it works
Calcium in this supplement works primarily through bone mineralization, helping to support bone density and mineral deposition. It also plays a role in neuromuscular relaxation, which supports muscle relaxation and nerve signaling [NIH ODS]. These functions are foundational for overall health but are not directly linked to testosterone production.
Safety profile
Data not available for this specific product. The FDA has received a total of 592059 adverse event reports across all supplement categories [FDA data]. For calcium specifically, high intakes might increase the risk of heart disease and prostate cancer. High levels of calcium in the blood and urine can cause poor muscle tone, poor kidney function, low phosphate levels, constipation, nausea, weight loss, extreme tiredness, frequent need to urinate, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS]. Calcium can also reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].
Our recommendation
If you are considering NOW TestoJack 200, we recommend you first discuss your specific health goals with your healthcare provider. For general health, ensure you meet your calcium needs through diet first, as the data does not support using this product for testosterone enhancement. Be aware of potential medication interactions if you take any of the listed medications [NIH ODS].
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