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Pre-order · Estimated to ship January 2027. Charged when you order.

The Gut-Brain Protocol box against a deep teal backdrop.

The Gut-Brain Protocol

Both formulas together. Subscribe monthly, every three months, or every six months, or order once.

Monthly

Billed every month

$99charged when you order

Renews at $99 every month.

Three months

Billed every three months

$264charged when you order

Renews at $264 every 3 months.

$88 a month equivalent. Charged in full every 3 months, not monthly.

Six months

Billed every six months

$462charged when you order

Renews at $462 every 6 months.

$77 a month equivalent. Charged in full every 6 months, not monthly.

One time

No subscription

$110charged when you order

No renewal.

Monthly

  1. Month 1: charged
  2. Month 2: charged
  3. Month 3: charged
  4. Month 4: charged
  5. Month 5: charged
  6. Month 6: charged

Renews every month until canceled.

3-month

  1. Month 1
  2. Month 2
  3. Month 3
  4. Month 4
  5. Month 5
  6. Month 6

Paid in full for three months. Renews every 3 months until canceled.

6-month

  1. Month 1
  2. Month 2
  3. Month 3
  4. Month 4
  5. Month 5
  6. Month 6

Paid in full for six months. Renews every 6 months until canceled.

The first payment is taken when you pre-order. Renewal timing is counted from your first shipment. Cancel before it ships for a full refund.

Subscriptions renew until canceled. Prices above are for both formulas together. For an individual morning or evening formula, use the links below to review its current options.

Read the amounts before you choose.

The ingredients page lists every ingredient and how much of it is in a serving, alongside the Supplement Facts for each formula. Both contain milk, because the Bimuno GOS is made from lactose.

The research library covers each ingredient on its own, at the amount each formula provides, with the studies linked. The finished Serene Biotics formulas have not been clinically tested.

Ingredients
When am I charged?

Payment is collected when you place your order, including a pre-order. Subscription renewals follow the interval shown with your selected plan. For pre-orders, the renewal schedule begins from your first shipment.

When will my first order ship?

Pre-orders are estimated to ship January 2027. You can cancel before shipment for a full refund. See our shipping and pre-order policy.

Can I cancel my subscription?

You can cancel future renewals through your account. For details about an order already being prepared or shipped, see the subscription policy or contact our team.

What does the guarantee cover?

Your first order is covered by our 30-day money-back guarantee, beginning when it is delivered. See the refund policy for full terms.