BioStacks
Natural Factors
Gastro-Assist™ with Mastic Gum, Saccharomyces Boulardii & Zinc L-Carnosine, 60 Vegetarian Capsules
2 Capsules × 2/day
Best for
Ingredients (6)
Zinc
100%Dose/day
16 mg
Target
15–30 mg
Form
Premium
Zinc L-Carnosine
100%Dose/day
75 mg
Target
37.5–75 mg
Form
Premium
Chamomile Extract 4:1
100%Dose/day
400 mg
Target
220–1500 mg
Form
—
Mastic Gum
100%Dose/day
520 mg
Target
500–2000 mg
Form
—
Bifidobacterium longum BB536®
Amount not found
Other Ingredients (3)
Magnesium StearateLubricant
A salt of stearic acid used as a lubricant in tablet and capsule production
Silicon DioxideAnti-caking
Fine silica powder used to prevent clumping
Capsule ShellCapsule
Generic capsule shell where the label does not specify the material. Common materials are hypromellose (HPMC) for vegetarian capsules and gelatin for traditional capsules — both are GRAS-listed and safe. Fish gelatin and pullulan variants also exist.
How to Take It
Best taken in the evening
Calming herb — used in the evening, most often as a pre-sleep tea or extract. Take it with food — the zinc in it is what makes this kind of product feel nauseating on an empty stomach.
With food
Space it a couple of hours from Iron and Calcium
Label directs 2 servings — keep one for the evening
On the label
2 capsules 2 times per day or as directed by a health professional.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$43.37
Pricier than 95% of 210 zinc supplements
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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.