That line reads like the start of one of those bold health claims—and I’d be careful with it.
There’s no verified method that can reliably make a 91-year-old’s circulation “like at 40.” Circulation is influenced by aging, blood vessel elasticity, heart health, and conditions like Atherosclerosis or Hypertension. While you can absolutely improve circulation at any age, reversing it to a much younger baseline isn’t something science supports.
If the “secret” you saw is a product or trick, it’s likely exaggerated or marketing-driven.
What does help circulation in a real, evidence-based way:
- Regular gentle movement (walking, stretching, light strength work)
- Staying hydrated
- A balanced diet (fruits, vegetables, healthy fats)
- Managing blood pressure and cholesterol
- Not smoking
- Medical guidance when needed
If you want, share the full “secret” you saw—I can break down whether it’s legit or misleading.