Ecommerce OS · Supplements6 min readUpdated October 26, 2026

Email Flows for Supplement Brands

The 8 email flows a supplement brand needs, replenishment timed to the supply, the subscription emails the rules require, and what to write.

Nick Bonnassies, CMO at Tagada · checked against 8 sources

Article summary

TL;DR

A supplement brand needs eight automated email flows: welcome, abandoned checkout, post-purchase onboarding, replenishment timed to the supply, subscription notices, failed payment, review request and win-back. The replenishment flow usually earns the most, because a bottle runs out on a schedule. Some subscription emails are not optional: card networks and state laws require them.

Flows get 5.58% click rates against 1.69% for campaigns, and about 13 times the placed order rate (Klaviyo, 183,000+ customers, 2026).
For a 30-day supply, Klaviyo's example sends the first reorder email on day 25 and a second 3 days later.
37.67% of supplement customers reorder within about 3 months of their first order (Decile, Q1 2024 cohort).
Visa requires a reminder at least 7 days before a trial ends; Mastercard requires a confirmation with cancellation instructions after sign-up.
Marketing emails need a physical address and an opt-out honored within 10 business days (CAN-SPAM).

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This guide is part of our playbook on the best ecommerce platform for supplement brands. SMS flows are in SMS flows for supplement brands.

The 8 flows

Flow	Trigger	Timing	Goal
1. Welcome	Email signup	Right away, then 2 to 3 emails over a week	First order
2. Abandoned checkout	Checkout started, no order	Within hours, then 1 day	Recover the order
3. Post-purchase onboarding	First order	Days 1, 3 and 7	How to take it, what to expect
4. Replenishment	Order of a one-time product	Before the supply runs out	Reorder or subscribe
5. Subscription notices	Subscription events	Before each renewal; before a trial ends	Fewer surprises, fewer disputes
6. Failed payment	Renewal declined	Day 0, then within 10 days	Update the card
7. Review request	Delivery plus 2 to 3 weeks	Once the product has been used	Proof for new buyers
8. Win-back	NoOrder after the expected reorder date	1 to 2 cycles later	Bring them back

Fig. 1The 8 flows across a customer's life

WelcomeEmail signup
Abandoned checkoutCheckout started, no order
OnboardingDays 1, 3 and 7 after the first order
ReplenishmentBefore the supply runs out
Subscription noticesBefore each renewal and trial end
Failed paymentRenewal declined
Review requestDelivery plus 2 to 3 weeks
Win-backNo order after the expected reorder date

Each flow starts on something the customer does, not on a calendar.

Replenishment timed to the supply

Reorders come early: 37.67% of supplement customers reorder within about 3 months of their first order, in Decile's Q1 2024 cohort.8

Time the reminder on how long the product lasts, not on a fixed number of days.

Supply	First reminder	Second reminder	Follow-up
30 days	Day 25	Day 28	After day 35, with an incentive
60 days	Day 52	Day 56	After day 65
90 days	Day 80	Day 85	After day 95

Klaviyo's example for a 30-day product: day 25, then 3 days later, then one follow-up after the cycle2. The 60- and 90-day rows apply the same logic.

Fig. 2A 30-day supply, as the customer sees it

What each email does

Day 25: first reminder, before the supply runs out.
Day 28: second reminder, 3 days later.
After day 35: one follow-up, with an incentive.
Reorder: one click to the same product, a second button to subscribe.

KlaviyoDay 25Running low?Reorder the same product in one click, or subscribe.
KlaviyoDay 28Second reminderYour supply is almost gone.
KlaviyoDay 35+Follow-up after the cycleCome back with an incentive.
Your storeDay 35+Order placedSame product, one click.

Two reminders before the bottle is empty, one after.

Illustrative example. Timing from Klaviyo's replenishment flow example.

Exclude subscribers from replenishment emails: they already receive the product.
One click to reorder the same product, and a second button to subscribe.
Send by product, not by order: a customer with two products gets two clocks.

Subscription emails the rules require

These are not marketing choices. Card networks and state law expect them.

Email	When	Required by
Sign-up confirmation with terms and how to cancel	Right after subscribing	Mastercard5
Notice before billing	Before renewals, for cycles of 6 months or less	Mastercard5
Trial ending reminder	At least 7 days before the trial ends	Visa4
Annual reminder	Once a year	California, contracts since July 1, 20256
Cancellation confirmation	When a subscription ends	Good practice, and proof in disputes

7 days

Minimum notice Visa requires before a trial ends

6 months

Cycles of this length or less need a Mastercard notice before billing

July 1, 2025

California annual reminder applies to contracts since this date

Business days to honor an opt-out under CAN-SPAM

Tagada follows Visa and Mastercard rules and the laws that apply to payments.

Watch out

A transactional email that reads like an ad loses its exemption. The FTC treats a message as commercial if its subject line suggests it, or if the transactional content isn't mainly at the beginning3. Keep renewal notices clear and put promotions below.

What to write (and what not to)

Write	Avoid
How to take the product and when to expect results	Promises of results by a date
Structure/function claims with the FDA statement7	Disease claims ("treats", "cures")
Real reviews, typical results	Testimonials with exceptional results as the norm
The next delivery date and how to change it	Hiding the cancel link
A subject line that matches the content3	"Your order has a problem" for a promotion

CAN-SPAM basics for marketing emails: accurate sender, honest subject line, ad disclosure, physical postal address, and an opt-out honored within 10 business days3.

Measure your flows

Metric	Read it by	Watch for
Placed order rate	Flow and email	Which email in the flow sells
Revenue per recipient	Flow	Compare flows fairly
Reorder rate at 90 days	Customers who got replenishment vs. not	The flow's real effect
Unsubscribe and spam rate	Email	Too many or irrelevant emails
Disputes after renewals	Subscription notices sent or not	Missing notices

Flows click at 5.58% on average against 1.69% for campaigns1; compare your flows with each other and over time.

Fig. 3Average click rate, flows vs. campaigns

Flows5.58%
Campaigns1.69%

Source: Klaviyo, Email benchmarks, 2026

Klaviyo, Email benchmarks, 2026, 183,000+ customers.

How Tagada helps

Renewals, retries and reorders that feed your flows

Subscriptions with trials, billing cycles, retries and automatic recovery, which drive notice and failed payment emails
One-page checkout that reorder and card update links can land on, with Apple Pay and Google Pay
One-click upsells to turn reorders into subscriptions
Server-side tracking to Meta, Google and TikTok

Plans are on the pricing page.

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Renewals, retries and reorders that feed your flows

Updated on October 26, 2026

Nick Bonnassies

CMO at Tagada

CMO at Tagada. Before Tagada, Nick built direct-to-consumer brands that generated over $115M in sales, raised over $25M in crowdfunding and sold two of them. He also works as a fractional CMO on marketing operations and AI systems.

Frequently asked questions

What email flows should a supplement brand have?

Welcome, abandoned checkout, post-purchase onboarding, replenishment, subscription notices, failed payment, review request and win-back. Start with abandoned checkout and replenishment: they recover or create orders right away.

When should a supplement replenishment email go out?

A few days before the supply runs out. For a 30-day product, Klaviyo's example sends the first email on day 25 and the second 3 days later, then one follow-up after the cycle. Exclude subscribers, who already receive the product.

Do I have to send emails before a subscription renews?

For trials, Visa requires a reminder at least 7 days before the trial ends. Mastercard expects a confirmation with cancellation instructions after sign-up and a notice before billing for cycles of 6 months or less. California requires an annual reminder for contracts since July 2025.

Can supplement emails make health claims?

The same rules as your labels and website apply. Structure/function claims need the FDA statement, and disease claims make the product a drug. Keep promises realistic and testimonials typical.

Sources

Checked October 26, 2026

Tagada

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