Higher potassium intake at dinner linked to fewer sleep disturbances – study

Study findings and internal inconsistencies

• Commenters note that the paper’s abstract reverses the direction of the main result: it claims higher insomnia scores are associated with higher potassium intake, while the results section and Table 3 clearly show higher potassium intake (especially at dinner) associated with lower AIS scores.
• Several people find it surprising this contradiction passed peer review. Most say they “trust Table 3” and the body text over the abstract.

Effect size, measurement, and limitations

• AIS ranges 0–24; the study sample averaged ~4.3 (mild problems).
• One commenter estimates that the reported regression coefficient implies only ~0.2 point reduction in AIS per SD of potassium intake, calling the effect marginal at an individual level.
• The insomnia outcomes are self‑reported, which some see as a major limitation given the availability of objective sleep trackers.
• It’s also noted the study doesn’t account for magnesium, which often correlates with potassium intake and could confound results.

Anecdotes on potassium, magnesium, and sleep

• Multiple people report better sleep with magnesium (often glycinate or chloride) and, for some, potassium supplements.
• One detailed anecdote links chronic symptoms (poor sleep, palpitations, thirst, fatigue, post‑meal sleepiness) to suspected kidney-related “salt‑wasting” and claims dramatic improvement with 600–1000 mg/day potassium plus magnesium.
• Others echo that balanced electrolytes (Na, K, Mg) improve sleep, exercise recovery, and reduce hangovers, though all emphasize this is personal experience, not medical advice.

Sources of potassium and cooking debates

• Bananas vs potatoes as potassium sources are debated; consensus is that bananas are decent but not unique.
• Discussion around frying/boiling potatoes: elements don’t disappear, but potassium can leach into water or oil; nutritional and glycemic effects change with preparation.

Safety and dosing concerns

• Several comments warn about hyperkalemia risk, especially with kidney impairment or certain antihypertensives, but others say risk is low from food for healthy people.
• Some note large single doses (e.g., lots of coconut water) can provoke palpitations; spreading intake over the day is encouraged.

Broader skepticism about nutrition news

• Many express general distrust of headline-driven diet stories, emphasizing small, noisy effects, recall bias in diet reporting, and the need to read primary studies rather than popular articles.