Benefits of Sleep¹ Support Card

Ashwagandha extract, particularly at dosages of ≥600 mg/day and for durations of ≥8 weeks, significantly improves overall sleep quality, especially in individuals with insomnia [1]. 

Melatonin is effective in reducing the time it takes to fall asleep and decreasing nighttime awakenings, with studies supporting its use for improving sleep patterns [2]. 

A combination of Ashwagandha and melatonin has shown the most consistent and pronounced benefits for sleep onset latency, total sleep time, wake after sleep onset, and sleep efficiency [3]. 

A systematic review and meta-analysis of five randomized controlled trials involving 400 participants found that Ashwagandha extract significantly improved overall sleep, with more prominent effects in adults diagnosed with insomnia, at dosages of ≥600 mg/day, and with treatment durations of ≥8 weeks. It also improved mental alertness on rising and anxiety levels, with no serious side effects reported [1]. Another systematic review highlighted Ashwagandha's beneficial effects in decreasing time to fall asleep, improving sleep duration and quality, and enhancing mood upon awakening, with most studies reporting no adverse events [4]. 

A review of supplements for sleep quality noted that melatonin has positive effects in older patients, and herbal preparations like Valerian, Ashwagandha, and Melissa officinalis are also used [5]. The review also mentions L-theanine as potentially beneficial for individuals with mental disorders, including depression and anxiety [5]. 

A prospective, randomized, double-blind, placebo-controlled trial with 200 men and women aged 18-50 years evaluated Ashwagandha root extract (ARE) and melatonin (MLT). The combination of ARE (600 mg/day) and MLT (3 mg/day) showed the greatest improvement in sleep onset latency (SOL), total sleep time (TST), wake after sleep onset (WASO), and sleep efficiency (SE) over eight weeks (p < 0.0001 for all). ARE and MLT monotherapy also provided moderate, comparable benefits [3]. 

A randomized, double-blind, placebo-controlled trial involving 150 healthy subjects with non-restorative sleep found that 120 mg of standardized Ashwagandha extract daily for six weeks led to a 72% increase in self-reported sleep quality compared to 29% in the placebo group (p < 0.001). The treatment group also showed significant improvements in sleep efficiency (p < 0.01), total sleep time (p < 0.001), sleep latency (p < 0.01), and wake after sleep onset (p < 0.05) [6]. 

A randomized, parallel-group, placebo-controlled study with 80 participants (40 healthy, 40 with insomnia) found significant improvements in sleep parameters (SOL, TST, WASO, SE) in the Ashwagandha root extract group, with more pronounced effects in insomnia patients. Improvements were seen in SOL (p = 0.013), mental alertness (p = 0.01), and sleep quality (p < 0.05) for insomnia patients [7]. 

An exploratory single-arm study on 19 participants with sleep problems showed that combined intake of GABA (700 mg/day) and L-theanine (200 mg/day) for four weeks significantly improved the total Pittsburgh Sleep Quality Index (PSQI) score, from 9.42 ± 1.80 to 6.26 ± 1.66 (mean difference, -3.15; p < 0.001) [8]. 

A 4-week, single-center, single-arm, open-label pilot study in 40 participants with mild-to-moderate insomnia demonstrated that a combination of melatonin, vitamin B6, California poppy extract, passionflower extract, and lemon balm extract significantly improved sleep quality (p < 0.001), sleep onset latency, total sleep duration, and sleep-related daytime impairment (p < 0.01 for all outcomes) [9]. 

Ashwagandha's sleep-promoting effects are linked to its influence on GABAergic transmission, with triethylene glycol identified as a key chemical responsible for sleep induction. It may also increase dopamine levels, potentially aiding restless legs syndrome [10]. Enzyme-treated Ashwagandha root extract increased sleep duration, δ-wave and non-rapid eye movement sleep times, and enhanced GABA and serotonin receptor expression in rodent models [11]. 

B-group vitamins (B6, B12) are cofactors for serotonin and GABA synthesis, and their deficiency can increase neuronal excitability, interfering with sleep [12]. Magnesium and calcium modulate neuronal excitability and melatonin synthesis, enhancing GABAergic tone and enzyme activity to promote slow-wave sleep [12]. Iron and zinc affect dopaminergic circuits, with iron supplementation reducing restless legs syndrome and sleep fragmentation [12]. Vitamin D regulates sleep through its nuclear receptor, controlling clock genes and melatonin secretion, and suppressing neuroinflammation [12]. 

Chamomile has been shown to improve daytime wakefulness, though not directly sleep [2]. Valerian is supported by several well-designed studies as an effective supplement for improving sleep patterns [2].