Boron ascorbate is a compound that combines boron, a trace mineral, with ascorbic acid (vitamin C). Boron itself has been studied for its role in bone health. Scientific evidence indicates that boron may help support the skeletal system by influencing the metabolism of minerals involved in bone development, such as calcium, magnesium, and vitamin D. Several animal and human studies suggest that boron supplementation can reduce urinary calcium excretion and promote bone strength, especially in individuals with low dietary mineral intake.

For example, a review published in Environmental Health Perspectives (2008) highlights boron's ability to modulate bone growth and maintenance, potentially by affecting steroid hormone levels and mineral metabolism. Human studies are limited but generally support modest benefits for bone markers, particularly in postmenopausal women. The ascorbate (vitamin C) component may further aid collagen synthesis, an important component of bone matrix, though most bone-health studies focus on boron alone rather than boron ascorbate specifically.

Overall, while there is scientific support for boron's role in skeletal health, evidence for boron ascorbate specifically is less direct. The rating reflects the moderate but not conclusive evidence from human and animal studies for boron’s role in supporting the skeletal system.