BioStacks
Natural Factors

Stress-Relax®, Nighttime Magnesium Bisglycinate Powder with Melatonin, Gaba & L-Theanine, Tropical Fruit, 4.23 oz (120 g)

Powder · 1 Scoop (4 g)

63 / 100Good

Score Breakdown

Formulation
72
Safety
87
Final score
63/100

Ingredients (4)

Melatonin

100%

Dose

2.5 mg

Target

0.5–5 mg

Form

Magnesium

100%

Dose

200 mg

Target

100–400 mg

Form

Premium

Gamma-aminobutyric acid

100%

Dose

100 mg

Target

100–300 mg

Form

L-theanine

50%

Dose

50 mg

Target

100–250 mg

Form

Other Ingredients (6)

MaltodextrinBinder

Spikes blood sugar faster than table sugar (glycemic index 85–105). Research links it to gut bacteria changes that may promote intestinal inflammation (Nickerson et al. 2015). Used as a cheap filler — adds nothing beneficial.

Natural FlavorsFlavor

Broad regulatory category of flavor constituents derived from natural sources. Composition is proprietary and not disclosed — 'Natural Flavors' can include several hundred different compounds depending on the target flavor profile, including hexane-extracted constituents and proprietary carrier solvents. 'Natural' is a regulatory definition (21 CFR §101.22), not a safety guarantee.

Rice HullsAnti-caking

Ground outer husk of rice grains used as a plant-based flow and anti-caking agent

Citric AcidAcidulant

Natural acid derived from citrus fruits

Stevia ExtractSweetener

Zero-calorie natural sweetener extracted from the leaves of Stevia rebaudiana

organic beetroot juice

Not reviewed yet

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).

This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.

The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.