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Clinically studiedIndependently testedTransparent labels

Vitamin B12

Keeps nerves firing and builds the red blood cells that carry oxygen. Low levels show up as fatigue and brain fog.

You might run low if you'rePlant-basedOver 50On metformin

Form: Methylcobalamin

Vitamin B12 (Methylcobalamin)

Clinically studied ingredient

Independently tested

Transparent label, no blends

Per capsule

1,000 mcg · take 1/day

Daily target

2.4 mcg; 500–1,000 mcg to correct a low

NSFcGMP

Clinician Rating 4.5

$19

$0.32/serving · 60 servings

Methylcobalamin 1,000 mcg

Clinically studied ingredient

Independently tested

Transparent label, no blends

Per capsule

1,000 mcg · take 1/day

Daily target

2.4 mcg; 500–1,000 mcg to correct a low

cGMP

Clinician Rating 4.5

$21

$0.35/serving · 60 servings

Vitamin B12

Clinically studied ingredient

Independently tested

Transparent label, no blends

Per capsule

1,000 mcg · take 1/day

Daily target

2.4 mcg; 500–1,000 mcg to correct a low

cGMP

Clinician Rating 4.5

$11

$0.09/serving · 120 servings

Iron Bisglycinate

Carries oxygen in your blood. When it's low, everything feels harder and you tire fast.

You might run low if you'reMenstruatingPlant-basedTraining hard

Form: Ferrous bisglycinate (gentle on the stomach)

Iron Bisglycinate

Clinically studied ingredient

Independently tested

Transparent label, no blends

Per capsule

25 mg · take 1/day

Daily target

8 mg men / 18 mg women

NSFcGMP

Clinician Rating 4.5

$14

$0.23/serving · 60 servings

Iron-C

Clinically studied ingredient

Independently tested

Transparent label, no blends

Per capsule

28 mg · take 1/day

Daily target

8 mg men / 18 mg women

cGMP

Clinician Rating 4.5

$18

$0.30/serving · 60 servings

Iron Bisglycinate 36 mg

Clinically studied ingredient

Independently tested

Transparent label, no blends

Per capsule

36 mg · take 1/day

Daily target

8 mg men / 18 mg women

cGMP

Clinician Rating 4.5

$0.10/serving · 90 servings

CoQ10

Powers the mitochondria that turn food into energy. Your body makes less with age.

You might run low if you'reOver 40On a statinChronically tired

Form: Ubiquinol

Ubiquinol CoQ10 100 mg

Clinically studied ingredient

Independently tested

Transparent label, no blends

Per softgel

100 mg · take 1/day

Daily target

100–200 mg

USP

Clinician Rating 4.5

$34

$0.57/serving · 60 servings

CoQ10 (Ubiquinone)

Clinically studied ingredient

Independently tested

Transparent label, no blends

Per softgel

100 mg · take 1/day

Daily target

100–200 mg

NSFcGMP

Clinician Rating 4.5

$29

$0.48/serving · 60 servings

CoQ10 200 mg

Clinically studied ingredient

Independently tested

Transparent label, no blends

Per softgel

200 mg · take 1/day

Daily target

100–200 mg

cGMP

Clinician Rating 4.5

$18

$0.30/serving · 60 servings

Magnesium Glycinate

A cofactor in 300+ reactions, including how your body uses glucose and makes energy. Most adults fall short.

You might run low if you'reSleeping badlyUnder stressCramping

Form: Magnesium glycinate (no laxative effect)

Magnesium Bisglycinate

Clinically studied ingredient

Independently tested

Transparent label, no blends

Per capsule

200 mg · take 2/day

Daily target

310–420 mg elemental

NSFcGMP

Clinician Rating 4.5

$43

$0.72/serving · 60 servings

Magnesium Glycinate

Clinically studied ingredient

Independently tested

Transparent label, no blends

Per capsule

120 mg · take 2/day

Daily target

310–420 mg elemental

cGMP

Clinician Rating 4.5

$38

$0.42/serving · 90 servings

Nutricost

Magnesium Glycinate

Clinically studied ingredient

Independently tested

Transparent label, no blends

Per capsule

100 mg · take 2/day

Daily target

310–420 mg elemental

cGMP

Clinician Rating 4.5

$20

$0.22/serving · 90 servings

Vitamin D3

Acts more like a hormone than a vitamin: energy, mood, immunity and blood sugar all lean on it.

You might run low if you'reIndoors most daysIn a low-sun climateDeeper-skinned

Form: D3, often paired with K2

Vitamin D/K2 Liquid

Clinically studied ingredient

Independently tested

Transparent label, no blends

Per serving

1,000 IU + 200 mcg K2 · take 1/day

Daily target

600–800 IU; often 1,000–2,000 IU, dose to labs

NSFcGMP

Clinician Rating 4.5

$28

$0.05/serving · 600 servings

Vitamin D3 5,000 IU

Clinically studied ingredient

Independently tested

Transparent label, no blends

Per serving

5,000 IU · take 1/day

Daily target

600–800 IU; often 1,000–2,000 IU, dose to labs

cGMP

Clinician Rating 4.5

$24

$0.20/serving · 120 servings

Vitamin D3 + K2

Clinically studied ingredient

Independently tested

Transparent label, no blends

Per serving

1,000 IU + 45 mcg K2 · take 1/day

Daily target

600–800 IU; often 1,000–2,000 IU, dose to labs

cGMP

Clinician Rating 4.5

$13

$0.11/serving · 120 servings

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