How Much Sun Do You Actually Need for Vitamin D?
"15 minutes a day" is close to useless — the real answer changes 10× with your skin type, latitude, season, and time of day. Here's what actually determines it.
We build software on top of real research. These are the deep dives: the physiology behind CalmTide and SolGlow, and the trading ideas you can practise in Hedge Fund CEO.
"15 minutes a day" is close to useless — the real answer changes 10× with your skin type, latitude, season, and time of day. Here's what actually determines it.
HRV, deep sleep, training zones and the HPA axis — why the metrics on your wrist track chronic stress, and how CalmTide turns them into one number.
Why a supplement number on a bottle tells you less than the sun does — and the physiology SolGlow uses to estimate what your skin actually made today.
From dollar-cost averaging to covered calls — classic strategies explained, and how to rehearse each one with virtual money before risking real capital.