Luria-Bertani (LB) broth is the most widely used medium for the growth of bacteria (Bertani 1951 ). We offer LB media in powder and liquid formats, along with ready-to-use LB agar plates.

Invitrogen One Shot LB Agar Plates

Ready-to-use LB Agar Plates (LB Miller’s formulation) with glass beads. Convenient for immediate use, with a longer shelf life for flexibility and reduced waste.

Formulation per one liter:

  • 10 g Casein peptone
  • 5 g Yeast extract
  • 10 g NaCl
  • 15 g Agar

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Gibco LB Broth, Liquid

Gibco LB Broth is based on the Lennox formulation, one of the most commonly used for LB medium.

Formulation per one liter:

  • 10 g SELECT Peptone 140
  • 5 g SELECT Yeast Extract
  • 5 g Sodium Chloride


Each bottle of Gibco LB Broth is filter-sterilized and ready-to-use in ergonomic Gibco media bottles with angled openings for simplified pipetting.

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LB Broth, Powder (Lennox)

Powder format of the LB Lennox formulation in convenient packaging to meet diverse research needs.

Formulation per one liter:

  • 10 g SELECT Peptone 140
  • 5 g SELECT Yeast Extract
  • 5 g Sodium Chloride

View all Lennox LB Broth

LB Broth, Powder (Miller’s)

Powder format of the LB Miller’s formulation in convenient packaging to meet diverse research needs.

Formulation per one liter:

  • 10 g SELECT Peptone 140
  • 5 g SELECT Yeast Extract
  • 10 g Sodium Chloride

View all Miller's LB Broth

LB Agar (Lennox)

Formulation per one liter:

  • 10 g SELECT Peptone 140
  • 5 g SELECT Yeast Extract
  • 5 g Sodium Chloride
  • 12 g SELECT Agar

View all Lennox LB Agar