Bluebonnet's Calcium Citrate + Magnesium keeps the formula simple: just the two minerals that work together for bone strength, muscle relaxation, and nerve signaling. Calcium citrate is chosen for its strong absorption profile, and the added magnesium helps balance calcium intake, since the two minerals are best taken together. A clean, capsule-based option for anyone who prefers a focused mineral stack over a crowded multi-ingredient formula.