Bayer Citracal Calcium Citrate

Our assessment

Calcium is a foundational mineral for bone health, and Bayer Citracal Calcium Citrate is a well-absorbed form that many people tolerate well. The evidence shows that adequate calcium intake is critical for bone mineralization and neuromuscular function [NIH ODS]. However, we must be careful with dosing, as very high intakes carry real risks.

How it works

Think of calcium as the building block for your skeleton and a key player in your nervous system. It supports bone density through mineral deposition and helps muscles relax and nerves signal properly [NIH ODS]. Calcium citrate, the form in this product, is often recommended because it can be taken with or without food and is easier to absorb for people with lower stomach acid.

Safety profile

FDA has received a total of 592,059 adverse event reports across all calcium products [FDA data]. 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, and abnormal heart rhythms [NIH ODS]. Some research suggests that high calcium intakes might increase the risk of heart disease and prostate cancer [NIH ODS]. Calcium can also reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

Start with a moderate dose and never exceed the RDA without a doctor’s guidance. Take your Bayer Citracal Calcium Citrate at a different time of day than any prescription medications you are on to avoid absorption issues [NIH ODS]. We recommend getting your calcium levels checked and discussing your total intake from food and supplements with your healthcare provider before starting.

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