Crystal Star Heartsease
Brand: Crystal Star · Form: CAPSULE [E0159] On Market
Our assessment
The evidence shows that Crystal Star Heartsease contains calcium as its primary ingredient. Based on the data provided, we cannot make a specific assessment about the product "Heartsease" itself because the only ingredient listed is calcium. For calcium, our assessment is that it is a well-researched mineral, but you need to be cautious about the total amount you consume from all sources, including this supplement [NIH ODS].
How it works
Calcium acts as a master regulator in your body. It supports bone mineralization to keep your skeleton strong and helps with neuromuscular relaxation, which is essential for proper nerve signaling and muscle function [NIH ODS].
Safety profile
FDA received a total of 592,059 adverse event reports for all dietary supplements, but specific data for this product is not available. For calcium specifically, high intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. Very high levels 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
We recommend that you do not exceed 2,500 mg of total calcium per day from all sources, including food and supplements [NIH ODS]. Because this product contains only calcium, and the specific dose per serving is not listed in the data provided, you should check the product label carefully. If you take other medications, take calcium supplements at least two hours apart from them to avoid absorption issues [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Crystal Star |
|---|---|
| Serving Size | |
| Contents | 60.0 Vegetarian Capsule(s) |
| Market Status | On 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