L-Threonic acid hemicalcium salt, also known as calcium L-threonate, is a specialty chemical widely utilized in the nutraceutical and pharmaceutical industries. It serves as an efficient calcium carrier that enhances calcium absorption and bioavailability in the body, making it superior to other calcium forms. It is commonly incorporated into dietary supplements to support bone health, particularly for individuals with calcium deficiencies or conditions like osteoporosis, by promoting skeletal strength and overall mineral balance.

Additionally, its unique ability to cross the blood-brain barrier has led to its use in cognitive health formulations, where it supports synaptic function, memory, and brain health. It is featured in nootropic supplements and products aimed at neuroprotection and mental clarity.

Further applications include functional foods and beverages for calcium fortification without affecting taste or texture, as well as oral care products for enamel remineralization and dental health. Emerging research explores its potential in medical recovery post-injury or surgery, though cosmetic uses for skin nourishment remain limited and investigational.