Sleep & energy
Your caffeine half-life is not the average one
Genetics change how fast you clear caffeine by a factor of several. Hormonal contraception roughly doubles how long it lingers. The standard advice is not written for you.
The Naked Journal
Women’s health, explained clearly.
Hormones, cycles, sleep, mood, fertility, perimenopause — and the patterns that connect them. Written to be read, not to be scrolled past.
Sleep & energy
Fatigue that sleep doesn't fix
If you are sleeping enough and still exhausted, the problem is elsewhere. Here is the list worth working through, roughly in order of likelihood.
Sleep & energy
CBT-I is the first-line insomnia treatment, and almost nobody is offered it
It outperforms sleeping pills long-term, it takes about six weeks, and most of it is counterintuitive enough that people abandon it in week two.
Sleep & energy
The 3am wake-up, explained
Waking in the small hours has a short list of usual causes. Cortisol timing, alcohol, blood sugar and a warm body account for most of them.
Sleep & energy
Why you sleep worse in the week before your period
Your core temperature is running half a degree warmer, and falling asleep depends on it dropping. That one fact explains most of it.
Sleep & energy
Why women have more insomnia than men
The gap opens at puberty and widens across life. Hormones explain part of it, but under-diagnosed sleep apnoea and unequal night-time labour explain more than most people expect.