21st Century Super Collagen plus Vitamin C
Brand: 21st Century · Form: TABLET [E0155] On Market
Our assessment
The evidence shows that this product combines two well-studied ingredients, but the specific benefits depend entirely on the amounts you are getting from your diet. Calcium is essential for bone health, but taking supplements without a known deficiency carries risks [NIH ODS]. Data for the specific “Super Collagen” blend in this product is not available in the provided data.
How it works
Think of calcium as the building block for your skeleton. It supports bone density and mineralization, and it is also critical for nerve signaling and muscle relaxation [NIH ODS]. The vitamin C component is known to support collagen synthesis, though specific data for this product’s collagen source is not provided in the data set.
Safety profile
Data not available for this specific product. However, the FDA has received 592,059 total adverse event reports across all supplements. For the calcium component specifically, high intakes can lead to serious risks including constipation, nausea, abnormal heart rhythms, and a high risk of death from heart disease [NIH ODS]. High calcium levels can also cause poor kidney function and extreme tiredness [NIH ODS].
Our recommendation
Do not take this supplement without first assessing your dietary calcium intake. The data shows that high calcium intakes from supplements may increase the risk of heart disease and prostate cancer [NIH ODS]. If you are taking any bisphosphonates, tetracycline antibiotics, or thyroid medication, be aware that calcium can reduce their absorption [NIH ODS]. Speak with your doctor to determine if this product is right for you.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | 21st Century |
|---|---|
| Serving Size | |
| Contents | 180.0 Tablet(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