biohacks

Log the sodium on every packaged item you eat for a week without changing anything, then spend the second week substituting the three biggest contributors.

Wear your sleep tracker for fourteen nights without changing a single habit — the number means nothing without a baseline to compare it to, and this is the one-time cost of getting that baseline cheaply.

Move 30–40 g of your daily protein into the first meal for four weeks and track whether afternoon snacking decreases — this tests meal-timing distribution, not total intake.

Alternate thirty minutes seated with thirty minutes standing, rather than committing to either one for the whole day.

Set a minimum step count you hit every day — including your worst one — rather than a weekly average you can rescue on Sunday.

Add five grams of fibre a week until you reach thirty — the ramp is what prevents the bloating that ends most attempts on day three.

An eight-week structured self-trial of an NAD+ precursor with objective sleep and HRV tracking. Animal evidence is strong; human RCT data is mixed. Treat subjective effects with caution — placebo is large.

Build cold-shower tolerance in 30-second weekly increments over four weeks. A low-barrier daily entry to cold exposure — cheaper than a plunge tub, sustainable as a permanent shower habit.

Submerging your face in 10–15 °C water for 10–15 seconds while holding your breath triggers the mammalian dive reflex — a sharp parasympathetic surge that drops heart rate and dampens acute panic.

20 minutes of Zone 2 cardio then 15 minutes in a sauna at 80–90 °C — two cardiovascular stimuli stacked into one 35-minute block, 1–2×/week on lighter training days.

End your shower with three cycles of 30 s hot → 30 s cold. Trains autonomic flexibility, elevates norepinephrine, and builds long-term HRV — three minutes, daily, no extra equipment.

Skip cold immersion for at least six hours after a strength or hypertrophy session — cold blunts the inflammatory cascade your muscle uses to grow.