Supplements
How do we sell supplements without answering every flavor by hand?
An AI agent for supplement brands answers flavor, size and stock from your catalog, builds the order, sends the payment link and follows up, without advising on health or dosage.
We reply instantly, at any hour.
Eva from $191 USD a month, billed yearly, AI credits included. See plans
Selling supplements by message rarely starts with a simple question. It starts with the flavor, the size and whether any is left, continues with what shipping costs, and ends with a screenshot of a bank transfer dropped into the thread.
EvaAI works with brands in any country and Eva answers in Spanish or in English; what is Mexico-specific is SPEI bank-transfer collection and CFDI tax invoicing.
The answer comes from your catalog
Catalog
Vanilla protein · 2 lb tub
Stock
14 available
Price
Your current list
Yes, vanilla protein in the 2 lb tub is in stock: 14 left. Shall I hold one and send you the payment link?
The answer is built from your data, never invented.
Daniela Ruiz
online
Today
Hi, do you have the vanilla protein in the 2 lb tub?
23:41
Yes, there are 14 vanilla 2 lb tubs. How many should I hold for you?
23:41
Just one. Can I pay by bank transfer?
23:42
Sure, here is your bank-transfer payment link. As soon as it clears, we prepare your shipment.
23:42
Payment confirmed
Done, I just paid.
23:48
Payment received. Your order is recorded and your invoice is on its way.
23:48
Hi, do you have the vanilla protein in the 2 lb tub?
23:41
Yes, there are 14 vanilla 2 lb tubs. How many should I hold for you?
23:41
Just one. Can I pay by bank transfer?
23:42
Sure, here is your bank-transfer payment link. As soon as it clears, we prepare your shipment.
23:42
Payment confirmed
Done, I just paid.
23:48
Payment received. Your order is recorded and your invoice is on its way.
23:48
What Eva did meanwhile
Catalog
Vanilla protein · 2 lb tub
14 available
Checked against your real catalog
Payment and invoice
Order built: 1 tub
Payment link · bank transfer
CRM
Daniela Ruiz · vanilla protein
Example. A flavor question at midnight: answers from your catalog, collects, invoices and schedules the follow-up.
- Quotes
- Charges
- Books
- Logs it in the CRM
- Follows up
Setup included · live in up to 5 business days once access and catalog are ready
The problem
The daily problem
- Almost every question is about a variant: which flavor, which size, and whether it is still in stock, a value that changes daily.
- A bank transfer does not end when the customer pays: somebody reads the receipt, matches it against the order reference and makes the shipping cutoff.
- And there is a line that does not get crossed: when someone asks whether a product will do something for them, that answer stops being commercial.
A day with Eva
A day with Eva
Somebody comments on the ad post at midnight. Eva answers in public using only what is verified in your catalog, and asks for the address, order number and payment details only in a private message. When the channel's private-reply window has expired, it does not offer a private reply it cannot send.
Inside the thread, the real question is about a variant. Eva searches your catalog, returns up to 25 candidates and answers only with the fields you marked visible; with variant inventory configured, it carries that variant's label, stock and price. If a photo of the tub arrives, Eva proposes candidates with a confidence level.
With the order assembled, Eva can create a SPEI bank-transfer payment link in pesos from your brand's connected account and, once the tax profile is complete, issue the CFDI tax invoice. If you keep receiving the receipt in the thread, Eva takes it as context and hands the conversation to your team.
After that Eva keeps the thread alive: it leaves the contact and the opportunity in the CRM and schedules follow-up, with up to five steps and delays of up to 180 days. The reorder cadence is yours: Eva does not calculate when a tub runs out and does not suggest how much to take. The moment somebody on your team replies, Eva goes quiet.
Concrete workflows
Three concrete workflows
Answer flavor, size and stock
Eva searches your catalog, returns up to 25 candidates and answers from the verified record, including per-variant stock.
The answer comes from your catalog
Catalog
Vanilla protein · 2 lb tub
Stock
14 available
Price
Your current list
Yes, vanilla protein in the 2 lb tub is in stock: 14 left. Shall I hold one and send you the payment link?
Answer the ad comment and move it private
Eva replies in public with catalog facts only, and asks for address, order and payment details privately.
Comment on your ad
Continued in a private message
Collect, invoice and come back for the reorder
Eva creates the bank-transfer payment link, issues the tax invoice once the tax profile is complete, and schedules follow-up.
Connected payment and invoicing
Payment link · bank transfer
Payment confirmed
Invoice_A241.pdf
CFDI 4.0 invoice issued and sent
We configure everything for you.
Technical details
Technical details
Typical integration
The catalog arrives as a file or through an API, and API sources sync every 24 hours. If you sell on Shopify, the store connects through OAuth and becomes the catalog source in read-only mode. With order ingestion enabled, off by default, purchase history is stored next to the CRM contact. For your shipping platform, the agent can call HTTP endpoints that system exposes.
Before you start
FAQ
Can Eva say a supplement is good for something?
No. Eva stays inside the commercial role you configured, and a platform rule keeps it from adopting a professional role you did not give it, medical included. Advertising permits, authorized legends and health-regulation compliance remain your brand's responsibility.
Can it confirm whether a product is genuine?
No. Visual search compares the customer's photo against your catalog images and returns candidates with a confidence level; an incomplete verification caps that at medium confidence. It identifies which product is being discussed, not whether a batch is genuine.
Does it answer with my flavors, sizes and stock?
With what you loaded and nothing else. Eva returns up to 25 candidates, uses only the fields you marked visible and, with variant inventory configured, publishes each variant's label, stock and price. What is missing does not get filled in: it says so and escalates.
Does it collect payment and invoice?
It can. In Mexico, Eva creates SPEI bank-transfer payment links in pesos from a connected account and issues CFDI tax invoices through Facturapi once the tax profile is complete. It does not create card payments and does not send the confirmation message itself.
What if the customer asks about their package?
When tracking lives in your shipping platform, that lookup has to be exposed and connected as an agent tool; until it exists, Eva does not invent a tracking number: it says so and asks for your team.
Related pages
Put Eva to work.
Send us your flavor list and ten real questions from your buyers. We will show you how Eva would answer them.
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