BioStacks
Best for
Ingredients (6)
Pau d'Arco bark extract
100%Dose/day
2000 mg
Target
1000–3000 mg
Form
—
Vitamin A
86%Dose/day
600 mcg RAE
Target
700–1500 mcg
Form
Budget
Vitamin C
16%Dose/day
40 mg
Target
250–2000 mg
Form
Budget
Dietary Fiber
20%Dose/day
2 g
Target
10–30 g
Form
—
Pau d'Arco
10%Dose/day
100 mg
Target
1000–3000 mg
Form
—
Other Ingredients (5)
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
Calcium CarbonateBuffer
Common calcium salt used as a buffering agent, filler, or mineral fortification in supplements
Microcrystalline CelluloseBinder
Plant-derived cellulose used as a binder and filler in supplements
Stearic AcidLubricant
Saturated fatty acid used as tablet lubricant
How to Take It
Take it anytime
Fat-soluble — take with a meal containing fat for better absorption. Time of day doesn't matter.
With a meal containing fat
Keep it away from medication and mineral supplements
Split into 2 doses across the day
On the label
1 to 2 tablets twice daily between meals.
The label says to take it on an empty stomach, but what's in this absorbs poorly without dietary fat. Take it with a meal that has some.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$13.57
Cheaper than 75% of 502 vitamin C 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.