BioStacks
Solgar

Brewer's Yeast Powder, 14 oz (400 g)

Powder · 2 Tablespoons (30 g)

iHerbAmazon

Best for

Muscle

Ingredients (24)

L-Methionine

100%

Dose

270 mg

Target

200–1000 mg

Form

—

L-Lysine

100%

Dose

1170 mg

Target

1000–3000 mg

Form

—

L-Glutamic Acid

100%

Dose

3330 mg

Target

500–2000 mg

Form

—

L-Aspartic Acid

100%

Dose

1710 mg

Target

1000–3000 mg

Form

—

L-Phenylalanine

100%

Dose

750 mg

Target

500–1500 mg

Form

—

Other Ingredients (1)

Nutritional YeastBase

Can trigger reactions in people with yeast sensitivity or Candida overgrowth. High in tyramine — may interact with MAOIs and cause hypertensive crisis. High in purines — may worsen gout. Can cause bloating and GI discomfort.

How to Take It

Best taken in the evening

Contains Tryptophan, so it belongs in the evening. Take it with food — the niacin in it is what makes this kind of product feel nauseating on an empty stomach.

With food
Keep it away from protein-heavy meals
Space it a couple of hours from Iron and SAMe

On the label

As a dietary supplement for adults, take two (2) tablespoons (30 g) daily. May be sprinkled on cereals, salads or incorporated into stews, soups, sauces, gravies, juices or baked goods.

Do not combine with St. John's Wort

Each of these raises serotonin activity on top of St. John's Wort, and together they can trigger serotonin syndrome — agitation, rapid heartbeat, raised blood pressure. Not without medical supervision.

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

Price Check

$12.74

$10$20$50

Cheaper than 89% of 797 multivitamins

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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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