Newsletter Insights — independent newsletter & sponsorship data across 41K+ newsletters
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Merging what I'm seeing in the ER with rigorous deep-dives on the very latest medical and public health data. I want you to know what really matters.
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rfk.com
88K
Top 10% in Health
substack
Health
0.22%· ~189/post
(comments + likes) / subscribers
vs 0.00% category avg
~2x per week
2.4 posts/week avg
vs 1.0/week category avg
$5.99/mo
Category avg: $5/mo
490
newsletters in Health
Top 10% in Health
out of 490 newslettersPublishing Frequency
~2x per week
Last published Oct 8, 2026
2.4 posts/week avg