Newsletter Insights — independent newsletter & sponsorship data across 32K+ newsletters
Browse all →Get the exact protocols not just to live longer, but better, with implementation steps, printable guides and mouth-watering recipes from a Medical Doctor with a Master of Science in Nutrition.
Enter your email and we'll connect you with this newsletter.
Tell us your brand and audience. We send back 10-15 newsletters matched to your brief, with sponsor history and CPM ranges per placement.
$300·2-3 working days·refunded if we can't deliver
See what's includedZenith Within by Sara Redondo, MD, MS's metrics, benchmarks, and sponsor data in one document
37K
Top 10% in Food
substack
Food
~12/post
avg comments + likes (0.03% rate)
Above category average
~3x per week
3.0 posts/week avg
vs 0.9/week category avg
$30/mo
Category avg: $5.5/mo
820
newsletters in Food
Top 10% in Food
out of 820 newslettersPublishing Frequency
~3x per week
Last published Apr 13, 2026
Usually publishes Sun
3.0 posts/week avg