You're getting two well-researched calming ingredients at full clinical doses. **Ashwagandha** (KSM-66 extract) delivers 600mg per serving — the top of the range used in RCTs showing reduced cortisol and perceived stress. **L-Theanine** adds 200mg, the exact single dose most studied for promoting relaxation without drowsiness.

The KSM-66 extract is a root-only standardized form with strong clinical backing for stress reduction and may also support sleep quality. L-Theanine complements it well — where ashwagandha works over weeks as an adaptogen, theanine can take effect within an hour, giving you both fast-acting and sustained support.

The two-tablet serving size is worth noting — if you take only one tablet, you're halving both doses. Ashwagandha at 300mg would still be within the clinical range, but you'd lose the full benefit of the combination at its studied doses.

BioStacks
Nature's Bounty

Anxiety & Stress Relief, 90 Tablets

2 Tablets · 45 servings · $0.65/serving

iHerbAmazon

Best for

Stress & MoodSleep

Ingredients (2)

Ashwagandha Extract KSM-66

100%

Dose

600 mg

Target

300–600 mg

Form

Premium

L-Theanine

100%

Dose

200 mg

Target

100–250 mg

Form

—

Other Ingredients (6)

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

Magnesium StearateLubricant

A salt of stearic acid used as a lubricant in tablet and capsule production

CrospovidoneDisintegrant

Cross-linked synthetic polymer used as a tablet disintegrant to help tablets break apart quickly in the stomach

Microcrystalline CelluloseBinder

Plant-derived cellulose used as a binder and filler in supplements

GlycerinHumectant

Sweet-tasting liquid used in soft capsules and liquids

Stearic AcidLubricant

Saturated fatty acid used as tablet lubricant

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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.

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