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NutraSleep

Source Naturals Sleep Science
4.3
(437 ratings)
GABA 600 mg
Taurine 875 mg
Valerian 200 mg
Magnesium 440 mg
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Score95

A melatonin-free sleep support formula using high-dose taurine, GABA, and traditional relaxing herbs.

How scoring works
Quantity:100 Tablet(s)(25 servings)
Goals:
Mood Support
Sleep Support
Stress Relief
Fitness
Heart Health
Anti-Aging
General Health
Anti-Inflammatory Support

Score 95

A melatonin-free sleep support formula using high-dose taurine, GABA, and traditional relaxing herbs.

How scoring works
$17.43($0.69 per serving)
iHerb
$ 17.43
Amazon
$ 17.99
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Analysis

This supplement is a reliable choice for those who struggle to unwind at the end of the day. It provides magnesium and inositol to support nervous system calm and muscle relaxation, which are essential for quality rest.

The combination of traditional herbs and amino acids offers a multifaceted approach to evening stress. If you find valerian too sedating, youtheory Relax Magnesium Powder is a lighter alternative that still supports calm.

Pros

  • High dose of taurine and GABA
  • Includes several traditional calming herbs
  • Melatonin-free for those who prefer it

Cons

  • Large tablet format
  • Very high total magnesium dose
  • Valerian has a strong, distinct scent

Warnings

  • High magnesium levels can cause loose stools
  • Do not consume with alcohol or other sedatives

Nutrient quality

96 Highest impact

Utilization of highly bioavailable magnesium citrate and meaningful doses of taurine and GABA provides robust support for relaxation. Selection of synergistic botanicals like skullcap ensures comprehensive coverage of sleep pathways.

Ingredient transparency

100 Highest impact

Milligram amounts for every active component and botanical extract are clearly disclosed for user safety. High transparency regarding the concentrations of specialized aminos ensures accurate professional evaluation of the formula's potency.

Customer satisfaction

90 Highest impact

Average ratings are strong and supported by a reliable volume of verified user feedback. Reviews suggest that the formula is particularly effective for those seeking support for mental relaxation and improved sleep architecture.

Value for money

90 Highest impact

Fair pricing for a comprehensive formula with high concentrations of amino acids and minerals offers good value. It remains a competitive choice for individuals seeking broad-spectrum support for nighttime wellness.

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Goals

Impact
Highest effect
A Goal FitA+ Strength of SupportA+ CoverageA+ Formula Quality

GABA, Taurine, Magnesium, Inositol, and Valerian root.

This robust combination of amino acids, minerals, and botanicals provides comprehensive support for nighttime relaxation and calmness.

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Impact
Highest effect
A+ Goal FitA- Strength of SupportA+ CoverageA+ Formula Quality

Magnesium, GABA, and Taurine are combined with Valerian and Passionflower in this comprehensive blend.

Providing 600mg of GABA and 200mg of Valerian appears well aligned with clinical data for helping the body transition to sleep.

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Impact
Highest effect
A+ Goal FitA- Strength of SupportA+ CoverageA Formula Quality

Combines 600 mg of GABA, 875 mg of Taurine, and 440 mg of Magnesium (Citrate/Oxide) with calming herbs like Valerian and Skullcap. This multi-faceted approach targets multiple pathways involved in physical and mental relaxation.

The robust doses of GABA and Taurine provide significant inhibitory support for the nervous system. While the presence of Magnesium Oxide is less ideal, the addition of Citrate helps improve the overall mineral bioavailability.

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Impact
Highest effect
A- Goal FitA Strength of SupportB+ CoverageA+ Formula Quality

Magnesium and taurine appear well aligned with supporting muscle relaxation and electrolyte balance.

These ingredients, delivered in significant amounts, may contribute to enhanced physical recovery and rest during periods of intense training.

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Impact
Highest effect
A Goal FitB+ Strength of SupportB CoverageB+ Formula Quality

This supplement delivers a very high dose of 880 mg of magnesium and 875 mg of taurine, both of which are cornerstone nutrients for heart rhythm and blood pressure. Magnesium acts as a natural calcium channel blocker, while taurine supports healthy contractility of the heart muscle.

While designed for sleep, the formula provides outstanding support for the primary cardiovascular pathways of mineral balance and vascular tone. However, the extremely high total magnesium dose and use of magnesium oxide may cause digestive discomfort for some users.

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Impact
Highest effect
B+ Goal FitA- Strength of SupportB CoverageA- Formula Quality

Taurine and GABA contribute to a focused strategy for relaxation and systemic antioxidant support. Taurine serves as a significant biomarker of longevity with evidence for healthspan extension across multiple systems.

Meaningful dosages of these amino acids appear well-aligned for addressing the stress and sleep drivers of physiological aging. This formula provides focused support for metabolic health and inflammatory balance through calming pathways.

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Ingredients

IngredientAmount per serving
Calories
14 Calorie(s)
Total Carbohydrates
1 Gram(s)
Niacin (Niacinamide)
10 mg
Vitamin B6 (Pyridoxine Hydrochloride)
2 mg
Calcium (Calcium Carbonate, Calcium Citrate)
254 mg
Magnesium (Magnesium Citrate, Magnesium Oxide)
440 mg
Sodium
10 mg
Taurine
875 mg
Inositol
700 mg
GABA
600 mg
Skullcap
250 mg
Passionflower extract
200 mg
Valerian
200 mg
Chamomile flower extract
100 mg
Gluten Free Adults 18–50 Dairy Free Sugar Free Vegetarian
Report overview
GABA · 600 mg OverallScore71
C+ Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyD- Value
This formula provides 600mg of GABA along with sleep-supportive herbs like Valerian and Passion Flower. It is a solid option for nighttime use, though its price is higher than simpler sleep aids.
Taurine · 875 mg OverallScore57
D+ Active Ingredient Quality & BioavailabilityB+ Dose, Safety & Label TransparencyF Value
This sleep support formula provides a strong 875mg dose of taurine. This is a very effective level for supporting relaxation and metabolic health in a single product.
Valerian · 200 mg OverallScore50
D Active Ingredient Quality & BioavailabilityC- Dose, Safety & Label TransparencyD- Value
NutraSleep provides a moderate dose of valerian as part of a calming mineral and amino acid blend. It is a well-rounded supplement, though the valerian content itself is on the lower side of efficacy.
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