Benefits of Sleep¹ Formula Caps
Introduction
Sleep¹ Formula is a multi-ingredient dietary supplement designed to improve sleep quality and overall well-being. It contains Ashwagandha (KSM-66), Valerian root extract, L-theanine from green tea, Chamomile, Passionflower extract, Hops extract, 5-HTP from Griffonia seed extract, and GABA. This report synthesizes current scientific literature on the individual components of Sleep¹ Formula to discuss their potential benefits for sleep and general health.
Key Findings
Ashwagandha supplementation (250-600 mg daily for 4-12 weeks) significantly improves sleep quality, latency, and efficiency, particularly in individuals with insomnia, and reduces stress by lowering cortisol levels [1] [2] [3] [4] [5] [6].
L-theanine, especially in combination with GABA, has been shown to decrease sleep latency, increase sleep duration, and improve non-REM sleep, while also reducing stress-related symptoms and improving cognitive functions [7] [8] [9].
GABA, a key inhibitory neurotransmitter, when combined with L-theanine, synergistically enhances sleep quality and duration by activating GABAA receptors and increasing GABA receptor expression [7] [8].
Evidence on Sleep and Stress Reduction
Numerous studies support the efficacy of several ingredients found in Sleep¹ Formula for improving sleep and reducing stress.
Ashwagandha: A systematic review and meta-analysis of five randomized controlled trials involving 400 participants found that Ashwagandha extract had a small but significant effect on overall sleep, with more prominent effects in adults diagnosed with insomnia, at dosages of ≥600 mg/day and treatment durations of ≥8 weeks [5]. Another randomized, double-blind, placebo-controlled trial involving 150 healthy subjects with non-restorative sleep found a 72% increase in self-reported sleep quality in the treatment group (120 mg daily for six weeks) compared to 29% in the placebo group, along with significant improvements in sleep efficiency, total sleep time, and sleep latency [10]. Ashwagandha's effects are attributed to its modulation of the hypothalamic-pituitary-adrenal (HPA) axis, reduction of cortisol, and enhancement of GABAergic and serotonergic pathways [1] [3] [4].
L-theanine and GABA: A single-arm exploratory study involving 19 participants with sleep problems showed that combined intake of GABA (700 mg/day) and L-theanine (200 mg/day) for 4 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]. An animal study also demonstrated that a GABA/L-theanine mixture (100/20 mg/kg) decreased sleep latency by 14.9-20.7% and increased sleep duration by 26.8-87.3% compared to either compound alone [7]. L-theanine alone has been shown in a randomized, placebo-controlled, crossover, and double-blind trial with 30 healthy adults to decrease PSQI scores, sleep latency, sleep disturbance, and use of sleep medication after four weeks of 200 mg/day administration [9].
Multi-ingredient supplements: A randomized, double-blinded, placebo-controlled crossover clinical study evaluated a multi-ingredient supplement containing Ashwagandha, GABA, and magnesium, among other components, in 30 healthy adults with self-reported insomnia. The study found significant improvements in difficulty falling asleep (p < 0.01), reduction in the number of awakenings during the night (p < 0.01), and overall sleep quality compared to placebo [11].
Conclusion
The ingredients in Sleep¹ Formula, particularly Ashwagandha, L-theanine, and GABA, have demonstrated significant benefits for improving sleep quality, reducing sleep latency, and enhancing overall sleep duration. These effects are often linked to their ability to modulate stress responses, lower cortisol levels, and influence neurotransmitter systems such as GABAergic and serotonergic pathways. While individual studies show promising results for these components, further research specifically on the combined Sleep¹ Formula and its exact formulation would be beneficial to generalize these outcomes.
References:
1) Wojciech Krzysztof Grabowski et al. Unlocking Better Sleep and Stress Relief: The Power of Ashwagandha (Withania somnifera) Supplementation – A Literature Review. Quality in Sport (2024). https://doi.org/10.12775/qs.2024.26.54904/
2) Przemysław Jędruszczak et al. Ashwagandha (Withania somnifera) - influence on sleep: review. Quality in Sport (2023). https://doi.org/10.12775/qs.2023.09.01.005/
3) Mateusz Haber et al. Ashwagandha as an Adaptogen: Its Influence on Sleep Patterns, Stress Response, and Anxiety in Modern Life. Journal of Education Health and Sport (2024). https://doi.org/10.12775/jehs.2024.68.55327/
4) Klaudia Malec et al. The impact of ashwagandha on sleep quality, anxiety reduction, and stress lowering: comparative analysis of available studies. Journal of Education Health and Sport (2024). https://doi.org/10.12775/jehs.2024.52.015/
5) KL Cheah et al. Effect of Ashwagandha (Withania somnifera) extract on sleep: A systematic review and meta-analysis. PloS one (2021). https://pubmed.ncbi.nlm.nih.gov/34559859/
6) D Langade et al. Clinical evaluation of the pharmacological impact of ashwagandha root extract on sleep in healthy volunteers and insomnia patients: A double-blind, randomized, parallel-group, placebo-controlled study. Journal of ethnopharmacology (2020). https://pubmed.ncbi.nlm.nih.gov/32818573/
7) S Kim et al. GABA and l-theanine mixture decreases sleep latency and improves NREM sleep. Pharmaceutical biology (2019). https://pubmed.ncbi.nlm.nih.gov/30707852/
8) H Konno et al. Effects of combined GABA and L-theanine supplementation on sleep quality: an exploratory study. European review for medical and pharmacological sciences (2026). https://pubmed.ncbi.nlm.nih.gov/41636292/
9) S Hidese et al. Effects of L-Theanine Administration on Stress-Related Symptoms and Cognitive Functions in Healthy Adults: A Randomized Controlled Trial. Nutrients (2019). https://pubmed.ncbi.nlm.nih.gov/31623400/
10) A Deshpande et al. A randomized, double blind, placebo controlled study to evaluate the effects of ashwagandha (Withania somnifera) extract on sleep quality in healthy adults. Sleep medicine (2020). https://pubmed.ncbi.nlm.nih.gov/32540634/
11) Anna Andersen et al. Assessment of a multi-ingredient dietary supplement on sleep quality: a randomized, double-blinded, placebo-controlled crossover clinical study. Sleep Science and Practice (2025). https://doi.org/10.1186/s41606-024-00122-7/