Here is the story of one of our Wellionaires who has been having an annual Wellcation here with us in Brazil since 2019. With his kind permission we are submitting this to the letters section of the BMJ, hopefully for publication.

ABSTRACT

Salt-sensitive hypertension remains incompletely understood, with emerging evidence suggesting a role for interstitial sodium storage. We report a 70-year-old male with a 28-year history of hypertension and strong family history of cerebrovascular disease who demonstrated a reproducible reduction in blood pressure during repeated 7-day lifestyle interventions over a 6-year period. Blood pressure normalised to approximately 110/70 mmHg without pharmacotherapy by day 6, accompanied by transient fatigue and weight loss (~5 kg). Following sustained lifestyle changes since 2020, including sodium restriction and regular sauna use, the patient has had no further emergency presentations for uncontrolled hypertension. Away from the intervention environment his BP slowly returns and requires Candesartan plus or minus Felodipine daily to maintain normal BP levels. This case supports a model of reversible, environmentally modulated hypertension potentially mediated by interstitial sodium storage.

Background

Traditional models of hypertension focus on renal sodium handling. Emerging evidence suggests sodium may be stored non-osmotically in skin and muscle, influencing blood pressure independently of fluid balance.

Case Presentation

A 70-year-old male with a 28-year history of hypertension, initially diagnosed following an eye exam which picked up retinal changes. It had been previously difficult to control, with multiple accident and emergency attendances for severe hypertension. The most recent acute presentation occurred in 2019. He is physically active, a non-smoker, and works in a high-stress environment. Family history is significant for cerebrovascular disease and hypertension.

Clinical Course

From 2020 onwards, the patient adopted sodium restriction and regular infrared sauna use. Since then, he has had no further emergency attendances for uncontrolled hypertension. Blood pressure remains environmentally sensitive, rising with increased sodium intake.

Intervention

Repeated 7-day programme annually over 7 yrs, essentially a FMD (Fasting Mimicking Diet ) : plant-based (~800 kcal/day), no added salt or preservatives, daily sauna, exercise, massage, reduced stress.

Outcome and Follow-up

Consistent pattern: fatigue days 1–3, recovery days 4–5, normal energy days 6–7. By day 6: BP ~110/70 mmHg, medications stopped, ~5 kg weight loss. BP rises again outside controlled environment.

Discussion

This case demonstrates a reproducible salt-sensitive hypertensive phenotype with sustained clinical improvement following lifestyle modification. The absence of emergency presentations since 2020 suggests meaningful alteration in disease trajectory. Findings support a role for interstitial sodium storage and mobilisation.

Learning Points

- Hypertension may be environmentally modulated
- Salt restriction can alter clinical trajectory
- Sauna may support BP control
- Interstitial sodium may play a role
- N-of-1 studies are valuable

Patient Perspective

Each time I attend the programme, I feel exhausted initially but then recover and my blood pressure normalises without medication. Since reducing salt and using sauna regularly, I have avoided further hospital visits.

References

1. Titze J. Nat Rev Nephrol. 2015.
2. Kopp C. Hypertension. 2013.
3. Dahlmann A. Hypertension. 2015.
4. Linz P. Radiology. 2015.
5. Rakova N. Cell Metab. 2013.