Best Supplement Efficacy Newsletters in 2026
NewsletterFIT tracks 3 newsletters that cover Supplement efficacy as a primary topic, all with posts in the last 90 days. By publicly shown subscriber count, the largest are RGNR - Nous c'est la Vie ! (100K), Gil Carvalho, MD PhD (10K) and The Business of Food (2K).
Updated Nov 6, 2026 · sorted by publicly shown subscribers · methodology
- 1RGNR - Nous c'est la Vie !100K subscribers
SubstackMonthly or less · last post 20 days ago
La lettre de RGNR TV et de Thierry Casasnovas : santé, hygiène de vie et régénération.
Likely audience: RGNR subscribers
- 2Gil Carvalho, MD PhD10K subscribers
SubstackWeekly · last post 2 days ago
From recent posts: Gil Carvalho, MD PhD publishes science-backed articles on nutrition, cardiovascular disease, and clinical trials for readers seeking evidence-based health information.
Likely audience: health-conscious consumers
- 3The Business of Food2K subscribers
SubstackEvery two weeks · last post 50 days ago
From recent posts: The Business of Food publishes industry analysis on consumer packaged goods, covering topics such as investment frameworks, vertical integration, supply chain verification, and food safety regulations. The publication…
Likely audience: CPG executives
Latest posts from these newsletters
- I Investigated…Gil Carvalho, MD PhD
- I Built…Gil Carvalho, MD PhD
- Chantier bénévole…RGNR - Nous c'est la Vie !
- I Investigated…Gil Carvalho, MD PhD
- Our understanding…Gil Carvalho, MD PhD
- Les astronautes…RGNR - Nous c'est la Vie !
- When Salt…Gil Carvalho, MD PhD
- Why Your…Gil Carvalho, MD PhD