BioStacks
Source Naturals

B-12 Fast Melt 5 mg

1 Tablet · 30 servings · $0.45/serving

iHerbAmazon

Best for

Energy

Ingredients (1)

Vitamin B12

100%

Dose

5000 mcg

Target

250–5000 mcg

Form

Premium

Other Ingredients (9)

MannitolSweetener

A FODMAP sugar alcohol that can cause GI distress (bloating, gas, diarrhea) at higher doses. Supplement amounts are typically small, but individuals with IBS or sugar alcohol sensitivity may react even at low doses.

Magnesium StearateLubricant

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

Natural Black Cherry FlavorFlavor

A proprietary natural flavoring blend imparting black-cherry taste

Natural FlavorsFlavor

Broad regulatory category of flavor constituents derived from natural sources. Composition is proprietary and not disclosed — 'Natural Flavors' can include several hundred different compounds depending on the target flavor profile, including hexane-extracted constituents and proprietary carrier solvents. 'Natural' is a regulatory definition (21 CFR §101.22), not a safety guarantee.

Citric AcidAcidulant

Natural acid derived from citrus fruits

Hydroxypropyl CelluloseBinder

An inert modified-cellulose polymer used as a binder, film-former, and disintegrant.

Microcrystalline CelluloseBinder

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

Microcrystalline CelluloseBinder

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

How to Take It

Best taken in the morning

Many people prefer it earlier in the day; there's no evidence timing changes anything. Absorption is fine with or without food.

With or without food

On the label

1 tablet daily. Place in mouth, allow tablet to dissolve, and swallow.

General guidance based on the ingredients, not a substitute for the label or your doctor.

Price Check

$13.61

$10$20$50

Cheaper than 65% of 250 vitamin B12 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.

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