Melatonin Supplements Linked to Nausea, Vertigo and Breathing Difficulties

Melatonin serves as the body's internal clock, a hormone generated by the pineal gland that orchestrates the circadian rhythm. Levels naturally climb in the evening to induce sleepiness and drop by morning to sustain alertness. Despite this endogenous production, approximately 67 million Americans, representing more than one in four of the population, rely on over-the-counter supplements to initiate sleep. While pharmacy shelves are stocked with dozens of brands promising rest without next-day grogginess, many users report adverse reactions ranging from nausea and dizziness to breathing difficulties.

Recent anecdotes from online discussions highlight these risks. One individual described waking four to six hours after taking a 2.5mg dose feeling nauseous, clammy, and suffering from severe vertigo. This user also noted low blood pressure, a condition that can starve the brain and vital organs of oxygen. Another report detailed taking 3mg and experiencing a spinning room and urge to vomit within twenty minutes. A third account described a state of misery where closing eyes triggered spinning sensations that worsened nausea, leaving the sufferer feeling as though they had the flu the following day. Concerns about respiratory function also arose, with one user stating supplements made breathing difficult, potentially due to the relaxation of upper throat muscles.

Clinical data has further complicated the safety profile of these supplements. A study published last year indicated that insomnia patients using melatonin were 90 percent more likely to be diagnosed with heart failure within five years compared to non-users. Furthermore, users faced a threefold increase in hospitalization rates for heart failure and were nearly twice as likely to die from any cause within that same period. However, experts caution that these findings reflect associations rather than direct causation, noting there is currently no evidence that melatonin usage directly causes heart failure.

The primary concern among nutritionists and dietitians lies in the inconsistency of dosing. Kristin Kuminski, a registered dietitian at The Rx Index, emphasized that while supplements may alleviate insomnia, the lack of standardized dosing poses significant dangers, particularly for children. Typical doses range from 1mg to 5mg, yet research from the Massachusetts Institute of Technology suggests that 0.3mg is sufficient to treat insomnia in older adults. This discrepancy is critical given that a 2023 study by the American Academy of Sleep Medicine found that 46 percent of parents administer melatonin to children under 13.

Public health officials have tracked the rising tide of pediatric exposure. In 2022, the CDC reported that poison control centers handled 260,435 calls regarding children who ingested excessive melatonin in the decade leading up to 2021. This figure represents a staggering 530 percent increase compared to 2012, when melatonin accounted for only one percent of pediatric poisonings. As the number of users grows, the gap between recommended therapeutic doses and available commercial products widens, leaving many without access to the safer, lower-dose alternatives that experts suggest.

Sleep supplement usage climbed to five percent of the population in 2021. Among reported poison cases involving these products, two children tragically died. Five additional victims required ventilators to assist with breathing, while nearly 300 patients needed intensive care. More than 4,000 individuals were hospitalized due to adverse reactions.

Reliance on sleep aids carries another risk: they may impair the body's natural ability to fall asleep and stay asleep. Studies indicate that effective melatonin doses are significantly lower than those found in most commercial supplements. Consistently high doses can blunt the body's own hormone production over time. As safety concerns grow, many Americans with insomnia are seeking more natural alternatives.

Dietitians and sleep experts told the Daily Mail that an unlikely grocery item may fit the bill. One hundred percent tart cherry juice is being promoted as an effective natural substitute for melatonin supplements. This beverage is a good source of two natural sleep aids and is considered a worthwhile swap to try for a few weeks before reaching for a pill.

A single glass containing four to eight ounces provides approximately 0.13 micrograms of melatonin. While this amount is six to sixty times less than a standard supplement, the juice also contains trace amounts of tryptophan. This amino acid has been linked to improved sleep duration and quality.

Kuminiski stated that tart cherry juice has real evidence behind it for sleep. The juice contains tryptophan and inhibits an enzyme that breaks down tryptophan in the body. This creates a compounding effect on melatonin production rather than just providing a direct dose.

Priced at about $6.50 per bottle or $1.60 per serving, the juice is comparable in cost to melatonin supplements. Supplement prices range from $5 to $30 depending on the brand and size. Lauri Leadley, a clinical sleep educator and founder of the Valley Sleep Center in Arizona, pointed to a 2012 study published in the European Journal of Sleep Medicine.

That study followed 20 participants who were asked to drink tart cherry juice twice daily for a week. Participants drinking the juice ended up napping less and sleeping longer at night than those who received a different drink. Leadley noted that the juice group showed increased levels of melatonin, indicating that drinking this juice boosts the body's melatonin levels.

Another 2019 study found that drinking 30 milliliters, or one ounce, of tart cherry juice twice per day increased sleep time by an hour in older adults with insomnia. However, consumers should not overdo it, as even too much of a good thing can be an issue.

Leadley noted that tart cherry juice is high in natural sugar, with about 25 grams of sugar in an eight-ounce glass. She suggested opting for a smaller glass, around two ounces, and making sure to buy 100 percent tart cherry juice to avoid added sugars.