A2 Kefir Grains — Heirloom Milk Culture

Heirloom A2/A2 kefir grains are a living milk culture composed of mixed bacteria and yeasts used to ferment milk into traditional kefir. Grains vary by batch and location; each maintains a symbiotic community that forms the characteristic textured grains.

Product details

  • Form: live kefir grains (starter culture)
  • Size: approximately 2 oz starter portion
  • Producer: Amos Miller (Amish Products Association)
  • Contains a diverse community of bacteria and yeasts used for milk fermentation

Strains commonly present

Milk kefir grains can contain a variety of lactic acid bacteria and yeasts. Strains commonly reported in milk kefir cultures include, for example:

Common bacteria strains

  • Lactobacillus acidophilus
  • Lactobacillus brevis
  • Lactobacillus casei
  • Lactobacillus delbrueckii subspecies
  • Lactobacillus helveticus
  • Lactobacillus kefiranofaciens
  • Lactobacillus kefiri
  • Lactobacillus paracasei
  • Lactobacillus plantarum
  • Lactobacillus rhamnosus
  • Lactococcus species
  • Leuconostoc species
  • Streptococcus thermophilus

Common yeast strains

  • Candida humilis
  • Kazachstania species
  • Kluyveromyces species
  • Saccharomyces species

Storage & handling

Follow basic care when activating and maintaining live kefir grains. Keep grains in fresh milk when in active use and follow provided care instructions to maintain culture health. Use non-metal strainers and storage vessels where possible.

Shipping expectations

Shipping windows vary by item and season. We’ll send tracking when your order ships.

For details, see our shipping page and FAQ.

On arrival

Please inspect your delivery on arrival. If something isn’t right, contact us and we’ll help.

Storage basics

Storage guidance depends on the item.

  • Frozen: keep frozen until use.
  • Refrigerated: keep cold.
  • Shelf-stable: store cool and dry.

Always follow any label instructions, and see Education for more.

Handling

Handle food safely and follow any label instructions. If you have questions about an item, contact Support.

Shipping, handling, arrival, and storage
More about

Review practical product expectations before building an order.

Handling
Cold
Shipping window
Ships on scheduled shipping days
Storage
Keep refrigerated

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