Free shipping over $50No proprietary blends · fully disclosed labelsThird-party tested · GMP certified facility
Customers also added these to their routine.
The star rating and review count summarize aggregated product feedback. The written reviews shown below are representative samples and are not verified individual purchases.
4.5
out of 5
For what you pay, the ingredient quality is excellent. Consistent quality across every tub I've bought so far. Sleep quality went up almost immediately, which is exactly what I wanted.
Dissolves completely in water, even without a blender. Consistent quality across every tub I've bought so far.
Consistent quality across every tub I've bought so far. Smooth flavor with no weird aftertaste, which is rare in this category. Label is clear about dosing and the bottle doesn't take up much shelf space.
Resealable tub keeps everything fresh and the scoop sits right on top. No proprietary-blend nonsense, just clearly dosed ingredients. The flavor is genuinely good — not chalky or overly sweet like a lot of others I've tried.
The label is refreshingly honest — full doses, nothing hidden. That alone earned my repeat business.
No upset stomach, no jitters, just a solid product that does what it claims.
Showing 6 of 37 written reviews
Source Naturals. The brain needs glumatic acid as a fuel to power numerous brain functions but it cannot cross the blood brain barrier. l-Glutamine can more easily enter the brain and be converted into glutamic acid, a neurotransmitter believed to support mental alertness and mood. Suggested Use: 1/4 to 1/2 teaspoon daily between meals. Allergies: Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no preservatives, or artificial color, flavor or fragrance. Over 40 Years of Trust. Source Naturals was created in 1982 by CEO Ira Goldberg to support everyone’s potential to enjoy optimal health. Manufactured in the USA. Manufactured in Scotts Valley, CA, under the Good Manufacturing Practices (cGMPs) established by the US Food and Drug Administration (FDA).