FAQs
Orders, delivery, subscriptions and returns. Anything else, email us.
Need help with an order?
Email info@useinterval.co.uk with your order number. If you're replying to one of our emails, just hit reply. We usually reply within 2 to 4 hours.
Orders and delivery
How much is UK delivery?
£2.95 with Royal Mail 48, and free on orders of £30 or more.
When will my order ship?
Order before 2pm and it ships the same day with Royal Mail 48, a 48-hour delivery service. You'll get an email when it's on its way.
Do you ship outside the UK?
We deliver to UK addresses only at the moment.
Can I use more than one discount code?
It's one code per order. Welcome codes are for your first order.
I've got a question about my order
Email info@useinterval.co.uk with your order number and we'll sort it.
Subscriptions
How much do I save with Subscribe and save?
Up to 15%, depending on how often it arrives. On Lactic Acid Buffer it's 15% off every 2 weeks, 10% off every month and 5% off every 6 weeks.
Can I skip, swap or cancel?
Yes, any time. Log in to your account to skip a delivery, change the date, swap products or cancel. If you get stuck, email info@useinterval.co.uk.
Products and dosing
How do I take each product?
Every dose and timing is on our How to take it page, product by product, with what to expect week by week.
How much caffeine is in Pre-Shot?
200mg per 60ml shot. Count it alongside your coffee, and keep it for earlier sessions if caffeine keeps you up.
Which products are caffeine-free?
Lactic Acid Buffer, Electrolyte+, Creatine, Beta Alanine and Collagen are all caffeine-free. Pre-Shot is the only one with caffeine.
Are your products vegan?
Pre-Shot, Lactic Acid Buffer, Electrolyte+, Creatine and Beta Alanine are all vegan. Collagen is made from bovine collagen peptides.
Why does Beta Alanine make me tingle?
It's a known, harmless effect of beta alanine and fades within 30 to 60 minutes. Splitting the 6g daily dose into 2 scoops, morning and evening, keeps it manageable. Pre-Shot has 1g of beta alanine, so a light tingle there is normal too.
How long before I notice Lactic Acid Buffer?
Most people start to notice it in hard sessions after around 10 days of daily use. If you're racing, start at least 10 days before the start line.
Can I take Lactic Acid Buffer and Beta Alanine together?
Yes. Take both in the morning. Beta Alanine is unflavoured, so you can stir it straight into your Lactic Acid Buffer.
Is it good for Hyrox?
The range was built for Hyrox and functional fitness. Our race week guide shows how the products fit together from 10 days out to the start line.
Where are your products made?
Every product is made in the UK by a leading UK manufacturer that works to GMP and ISO standards.
Do your products contain allergens?
Pre-Shot, Electrolyte+, Creatine, Beta Alanine and Collagen have no listed allergens. Full ingredients for every product, including Lactic Acid Buffer, are on the label and the product page.
Returns
Can I return an opened product?
Yes. Every order comes with a 30-day money-back guarantee, and that includes opened supplements. You've got 30 days from delivery to request a return. Sale items and gift cards can't be returned.
How do I start a return?
Email info@useinterval.co.uk with your order number and we'll send you a returns label and instructions. Please get in touch before sending anything back.
When will I get my refund?
We'll email you once your return is checked. Approved refunds go back to your original payment method within 10 business days. Your bank may take a little longer to show it.
My order arrived damaged or wrong
Email info@useinterval.co.uk straight away with your order number, and we'll put it right.
Can I exchange a product?
Return the item, then place a new order for the one you want.
Full details are in our refund policy and shipping policy.