If you feel bombarded by conflicting advice on how to stay (or get) healthy, you’re not alone. Intermittent fasting, juice cleanses, and low-carb diets are a few of today’s health trends, but fashionable health advice is nothing new. Consider these health tips from ancient physicians, which range from surprisingly relevant to downright absurd. (Just don’t consider any of it actual medical advice, of course—that’s what modern physicians are for.)
1. PAY ATTENTION TO YOUR DREAMS.
Galen, a Greek physician who treated Roman emperor Marcus Aurelius among others, wrote hundreds of texts about medicine starting around 150 CE. Galen believed that what you dream about can indicate your overall level of wellness and reveal specific ailments you might be suffering from. Before you call him a quack, keep in mind that he acknowledged that some dreams are simply a random assortment of the day’s events, rather than a direct message about the state of one’s health. As he wrote in On Diagnosis in Dreams:
“The vision-in-sleep [dream], in my opinion, indicates a disposition of the body. Someone dreaming a conflagration is troubled by yellow bile, but if he dreams of smoke, or mist, or deep darkness, by black bile. Rainstorm indicates that cold moisture abounds; snow, ice, and hail, cold phlegm. … But since in sleep the soul does not produce impressions based on dispositions of the body only, but also from the things habitually done by us day by day, and some from what we have thought—and indeed some things are revealed by it in fashion of prophesy … the diagnosis of the body from the visions-in-sleep that arise from the body becomes difficult.”
2. DON’T CHANGE YOUR DIET TOO QUICKLY.