Calcium

Calcium (Ca) — 10-Year Trends

As of 2026-09-25 · the last 10 years

Research intensity for calcium has steadily declined over the last decade, currently sitting at about 42% of the element’s all-time peak, which occurred in 1979, well before this window.

Research intensity ran from about 54% of the element's own all-time peak in 2016 to about 42% in 2026 — a steady decline, and the all-time peak (1979) lies before this window. Over the same span its share of research attention across all elements fell. Among the 118 elements, calcium has one of the largest research literatures of any element.

The number of papers involving the element rose from about 114,925 in 2016 to about 244,052 in 2025 (2.12x). That matches the growth of the literature as a whole over the same years: the general tide of scientific output, not a surge specific to the element.

The material research communities for calcium in the current period are defined by specific applications of the element in materials science and physiology. The largest group, Calcium Sulfoaluminate and Limestone Calcined Clay Cements, accounts for about 18% of the element's recent research and has remained steady in share. This community focuses on developing low-carbon cement binders using calcium sulfoaluminate and limestone calcined clay composites; calcium is one strand of this broader community, with about 26% of its papers involving calcium. A key paper in this area, "Bond Characterization in Cementitious Material Binders Using Fourier-Transform Infrared Spectroscopy" (2023), has been cited over 420 times.

A second major community, Calcium Phosphate Cements and Bone Graft Materials, holds about 14% of recent research and is also steady. These papers focus on the synthesis and application of calcium sulfate, phosphate, and silicate cements as bone graft substitutes. Calcium is one strand of this broader community, with about 29% of its papers involving calcium. Recent work includes "Application of Hydroxyapatite Composites in Bone Tissue Engineering: A Review" (2025), cited over 100 times.

The third named community, Voltage-Gated and Store-Operated Calcium Channel Physiology, represents about 12% of recent research and remains steady. This group characterizes the biophysics of L-type, T-type, and store-operated calcium channels, focusing on ion entry, dynamics, and pharmacological blockade. Calcium is one strand of this broader community, with about 19% of its papers involving calcium. A standout contribution is "Fast and sensitive GCaMP calcium indicators for imaging neural populations" (2023), cited over 850 times.

The remainder of the literature, holding about 55% of the element's research, is distributed across other communities that are too small to name individually but collectively maintain a steady share. The overall composition shows no single community gaining or losing significant ground; the mix of cement, biomaterial, and physiological research has held its relative weight over the last two five-year periods.

For a deeper look at calcium’s current standing, see the Last 12 Months and Executive Brief reports.