21st Century Chewable Zinc Plus Vitamins C & B-6
Brand: 21st Century · Form: TABLET [E0155] On Market
Our assessment
The evidence shows that zinc, vitamin C, and vitamin B-6 are important nutrients, but the specific combination in this product requires you to be mindful of your total intake. Data not available for the exact amounts in this specific supplement. The most critical interaction to consider is with calcium, which can interfere with the absorption of several common medications [NIH ODS].
How it works
Think of the minerals and vitamins in this supplement as team players that support your body's core functions. Calcium is essential for bone mineralization and neuromuscular relaxation [NIH ODS]. Zinc and vitamin C are well-known for supporting immune health, while vitamin B-6 plays a role in over 100 enzyme reactions, including those that help your body process protein and produce neurotransmitters.
Safety profile
FDA received 592,059 total adverse event reports across all dietary supplements. For this specific product, data on side effects is not available. However, based on the ingredients, high calcium intakes can cause constipation, nausea, and abnormal heart rhythms [NIH ODS]. High calcium levels in the blood and urine can also lead to poor muscle tone, poor kidney function, low phosphate levels, weight loss, extreme tiredness, frequent need to urinate, and a high risk of death from heart disease [NIH ODS].
Our recommendation
Our recommendation: Check the label for the exact milligrams of calcium in each serving. If you take any medications for thyroid conditions (levothyroxine), osteoporosis (bisphosphonates), or infections (tetracycline or fluoroquinolone antibiotics), take this supplement at least two hours apart from those medications to avoid absorption problems [NIH ODS]. Start with one serving per day and monitor for any digestive discomfort. If you have a history of kidney stones or heart disease, consult your doctor before use.
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | 21st Century |
|---|---|
| Serving Size | |
| Contents | 90.0 Cherry Flavor 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