Share your code. Earn credit.
Every Optimal Lab account comes with a personal code. Your friend gets 5% off, or 15% off their first order with an account. You earn 5% of what they pay as store credit, or 15% on a new customer’s first order. Credit is held for 30 days, then yours for 3 months, up to £250 a month. There is no application and no approval. Join from your account and your code is ready straight away.
Get £5 to start. Join Share & Earn and we will add £5 of store credit to your account, ready to use once an order reaches £30, not counting a small number of exempt items. We will confirm what applies at checkout.
5% or 15%
off for your friend, 15% on their first order with an account
5% or 15%
back to you as store credit, 15% on a new customer’s first order
£250
the most you can earn in a month
Three steps, and the first one takes a moment.
Join from your account
Register for an account, then join in a moment from your account page. Your personal code and share link are ready straight away — no application, no approval, no waiting to be picked.
Share your code
Send it to anyone. When they check out using it, they get 5% off, or 15% off their first order with an account. Shipping and a small number of exempt items are not included. You cannot use your own code on your own order.
Earn store credit
You earn 5% of what they pay as store credit, or 15% on a new customer’s first order. Credit is held for 30 days, then yours for 3 months, up to £250 a month.
Any account holder. No approval needed.
There is no application and no cohort. If you have an Optimal Lab account, you can join — whether you have ordered once or order every month. You do not need an audience, a channel, or a business.
Share & Earn is its own thing. Joining it does not make you an Optimal Ambassador or an Optimal Wholesaler — those are separate, applied programmes with their own terms.
Held 30 days, then yours for 3 months.
Credit is held for 30 days after your friend’s order is complete, then it is available to spend for 3 months. You can earn up to £250 in credit a month across all your referrals.
Spend it at checkout when you are paying by cash on collection or PayPal. It can only be spent with us, and it is never paid out as cash.
Nothing here is hidden in small print.
You cannot refer yourself
Your own code will not apply to your own order.
What the percentages are calculated on
Their discount is taken on the product subtotal of their order — shipping and a small number of exempt items are not included. Your credit (5%, or 15% on a new customer's first order) is earned on that order subtotal after the discount, excluding shipping.
If their order is refunded
Your credit is reduced to match. If the order is cancelled, the credit is taken back in full.
Unusual activity pauses a code
If a code sees 20 or more redemptions within 24 hours, we pause it while we check for misuse.
Credit is credit, not cash
It can only be spent with us, and it is never paid out as cash.
It does not stack
A Share & Earn code cannot be combined with an Optimal Ambassador discount code or Optimal Wholesaler partner pricing on the same order.
If you post your code publicly, label it
Sharing your code with friends privately needs nothing. But you earn credit from it, so a public post, story or video about Optimal Lab is an ad under the UK CAP Code — start it with #ad, and make no claims about what anything does.
Your code is a moment away.
Join from your account page and start sharing today.
Join from your account →Share & Earn is one of three.
For UK content creators.
One personal discount code. Your audience gets a discount at checkout, and you earn a flat commission on the gross value of every order it brings in, excluding delivery. Applications are reviewed individually.
Read the terms and apply →Optimal WholesalerFor buying in volume.
For UK-based buyers purchasing in volume for onward supply within the research-use market, under their own account. Partner pricing applies per order, reviewed together every 3 months. You do not need to be a registered business.
Read the terms and apply →These don’t stack: a Share & Earn code, an Optimal Ambassador discount code, and Optimal Wholesaler partner pricing can’t be combined on the same order.
For laboratory research use only · Not for human or veterinary use