All Science in Sport products are certified under the strict guidelines of the INFORMED Sport Programme. To achieve this, an independent organization (LGC Assure) with an accredited, independent laboratory that’s been testing for banned substances for over 20 years, rigorously tests our products to detect all compounds on the World Anti-doping Association Banned Substances list.
Informed Sport
Providing assurance for athletes, All INFORMED Sport certified Science in Sport products are rigorously tested, screening for all compounds on the WADA Banned Substances list.
How It's Tested
1. Product Review
2. Lab Tests (3+)
3. Batch Tests
4. Random Tests
Supplement Testing Labs
Driven by innovation and excellence, INFORMED Sport is the leading independent supplement testing provider, specialising in drug surveillance, doping control and supplement analysis.
Next Working Day Delivery Information:
Weekdays: Orders placed before 6:30pm will be delivered the next day - including on Saturdays.
Weekends: Orders placed before 1pm will be delivered the next day - including Sundays.
Bank Holidays: Orders will not be delivered on Bank Holidays. Any orders placed on a Bank Holiday will not be collected from our warehouse until the next non-holiday day, for delivery the following day.
Please note that Next Day Delivery excludes these postcodes: AB31-56, BF (all), BT (all), FK17-21, GY (all), HS (all), IM (all), IV (all), KA (all), KW (all), PA20-80, PH (all), TR21-25, ZE (all)
Please see specific promotion Terms & Conditions for details BFPO Addresses We do ship to BFPO addresses (with Royal Mail) but for active combat zones there is a strict 2kg weight limit (as with all deliveries to BFPO addresses), so please take this into account when ordering. As a guide, with careful packaging we can just get away with a 1.6kg tub. All orders under this weight limit will be treated as standard UK orders. All orders over this weight will be priced incrementally according to their weight (£5 per 2kg increase). If you have any queries regarding a BFPO address, please contact our Customer Service Team who will be happy to assist with your order.
over night recovery formula
Designed to help athletes recover optimally throughout the night
30 grams of protein
Including slowly digesting micellar casein
A range of additional nutrients
To help maximise sleep duration and quality
Vitamin B1 & B2 contribute to carbohydrate conversion
Vitamin B6 aids protein metabolism.
REGO SLEEP PROVIDES
30g of protein including slowly digesting micellar casein, which was previously shown to stimulate over-night protein synthesis and promote a positive protein balance. 3g of glycine, a non-essential amino acid that was shown in randomised trials to enhance sleep quality in healthy individuals. 150mg of magnesium, a mineral that plays a role in sleep quality and maintaining a normal circadian rhythm. 250mg cocoa extract, a rich source of polyphenols shown to display anti-inflammatory properties and to be associated with sleep health. 200mg tart cherry extract, a rich source of polyphenols and melation which were shown to enhance sleep quality in healthy individuals. 200mg tryptophan, an amino acid that is used in the synthesis of serotonin and melatonin, and which was shown when supplemented to enhance sleep quality. 200mg theanine, an amino acid that was shown to enhance sleep quality when supplemented alone and in combination with other bioactives.
WHY CHOOSE?
30g of slow-release casein protein per serving
A range of additional nutrients that help maximise sleep duration and quality
SUGGESTED USE
Mix 1x sachet with cold water as a shake or warm in the microwave to consume as a hot chocolate.
Reviews
Reviews
4/5
5 reviews
by Jon Rickards
12/12/2025
Excellent product
by Gail Sheeley
12/12/2025
Easy to digest
by Julia Hanson
10/12/2025
I didn't notice any difference.
by Anne
08/12/2025
The Rego Sleep Casein chocolate brownie has a nice taste, not sure if it made any impact on my sleep
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