Strontium (Sr) is correlated with calcium levels in the hair, and is one of the essential bone nutrients. Chemically, Sr is similar to calcium and boron, and Sr can replace calcium in many biological processes.
Sources for Sr are:
- Brazil nuts
- dairy products
If Sr levels (and calcium levels) are high in the hair, these levels are typically low in the bones due to demineralization and/or loss of assimilation of nutrients in the bone. Sr is found in some hair dyes, bleaches, and permanent solutions.
Excess Sr levels are connected with a lack of vitamin C and rickets.