Bluebonnet Calcium Citrate plus Magnesium

Our assessment

The evidence shows that Bluebonnet Calcium Citrate plus Magnesium is a straightforward mineral supplement. The key ingredient, calcium, has well-documented benefits for bone health, but the data also highlights important safety considerations you need to be aware of before starting supplementation.

How it works

Calcium acts as a master regulator for your body. It supports bone density through mineralization and helps with neuromuscular relaxation, meaning it plays a role in muscle relaxation and nerve signaling [NIH ODS]. Think of it as the building block your body uses to keep your skeleton strong and your nerves communicating properly.

Safety profile

Data not available for specific side effects of this product. However, FDA has received 592,059 total adverse event reports across all supplement categories [FDA data]. For calcium specifically, high intakes might increase the risk of heart disease and prostate cancer. 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]. You should also know that calcium can reduce the absorption of several medications, including bisphosphonates, tetracycline antibiotics, fluoroquinolone antibiotics, levothyroxine, and phenytoin [NIH ODS].

Our recommendation

If you are considering this supplement, start by assessing your dietary calcium intake first. Be cautious about taking high doses without medical supervision due to the potential risks. If you take any of the medications listed above, take this supplement at least two hours apart from those medications. Always consult your healthcare provider before beginning any new supplement regimen [NIH ODS].

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