I was very happy to see that the article addressed this immediately in the second paragraph:
The researchers cautioned, however, that they cannot draw a direct, causal connection between meditation and preserving gray matter in the brain. Too many other factors may come into play, including lifestyle choices, personality traits, and genetic brain differences.
The researchers cautioned, however, that they cannot draw a direct, causal connection between meditation and preserving gray matter in the brain. Too many other factors may come into play, including lifestyle choices, personality traits, and genetic brain differences.
Good reporting.