Natural health, self-tested No hype · No paywall · No medical advice

Jonas Feld

I test things on myself so you don’t have to guess. Extended fasts, juice cleanses, lymphatic routines, training blocks — run as real experiments, written up in full, including the parts that failed.

Everything here is free. Nothing here is medical advice — it’s one man’s notebook, kept in public.

Portrait — coming soon
Now
Updated Aug 26, 2026
№ 02 — Latest writing All posts →
Aug 24, 2026Fasting11 min

What 72 hours without food actually felt like — hour by hour

Hour 14 was fine. Hour 31 was not. The full log of my longest fast yet: energy, sleep, mood, and the one mistake that made hour 50 harder than it needed to be.

Aug 17, 2026Training7 min

The five training mistakes I kept making after 35

Aug 10, 2026Lymphatic9 min

I followed a lymphatic drainage routine for 30 days. Here’s what changed — and what didn’t

Prefer talking to reading? The Telegram group is where experiments get discussed in real time.

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№ 03 — The weekly dispatch

One email a week. What I tested, what broke, what I’d do differently.

No funnels, no countdown timers, no “premium tier”. The list is simply how I stay in touch with people who find this stuff useful.