BioStacks
Best for
Ingredients (9)
Folate
100%Dose
1330 mcg DFE
Target
400–800 mcg
Form
Premium
Vitamin B12
100%Dose
1000 mcg
Target
250–5000 mcg
Form
Premium
Vitamin B6
100%Dose
25 mg
Target
25–100 mg
Form
Premium
N-Acetyl-L-Cysteine
100%Dose
600 mg
Target
600–1800 mg
Form
—
Riboflavin
6%Dose
1.6 mg
Target
25–100 mg
Form
Budget
Other Ingredients (5)
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
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.
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
Best taken in the morning
The Vitamin B12 in it is what pulls this toward the morning. Take it with food — the zinc in it is what makes this kind of product feel nauseating on an empty stomach.
With food
NAC does better on an empty stomach, but something else in this bottle needs food. Taking the whole product with a meal is the better trade — an upset stomach is why most people stop.
Space it a couple of hours from Iron and Calcium
On the label
Directions: Take 2 capsules once daily, or as directed by your healthcare practitioner.
General guidance based on the ingredients, not a substitute for the label or your doctor.
Price Check
$49.23
Pricier than 90% of 61 vitamin B2 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.