Shoppers say this £11.99 supplement gives deep, refreshing sleep with no grogginess or brain fog

Struggling to fall asleep, stay asleep, or feel rested in the morning? You’re not alone — but a 40p-a-day supplement might just be the miracle fix. Users say it’s completely transformed their nights, and the best part? It won’t break the bank.

Protein Works’ Sleep Deep capsules have been flying off shelves after dozens of rave reviews from sleep-deprived shoppers, many of whom say the supplement finally helped them drift off peacefully — and stay asleep through the night. Now reduced from £19.99 to £11.99, a 30-day supply comes in at just 40p per dose.

Backed by science and designed to support deep, restorative rest, Sleep Deep blends calming herbs with sleep-regulating nutrients. The formula includes soothing favourites like lemon balm, lavender, and chamomile — known for their gentle sedative effects — as well as magnesium, to support muscle relaxation and energy balance.

But the star of the show is L-Tryptophan. This amino acid is a precursor to serotonin (the brain’s “feel good” chemical) and melatonin, the hormone responsible for regulating your internal clock. According to Protein Works’ Chief Product Officer, Kyle Crowley, it’s this combination that makes the formula stand out.

“We designed Sleep Deep around real science,” Crowley said. “It’s not just about helping people fall asleep faster — it’s about getting them into the deep sleep stages that truly restore the body and mind. That’s what makes the difference the next day.”

Users agree. One shift worker described the supplement as a “lifesaver,” writing: “Since purchasing these, I can genuinely say they’ve given me the best night’s sleep. They’ve literally saved me from countless sleepless nights.”

Another reviewer said the change was immediate. “I’ve noticed a huge improvement from the first morning. I don’t wake during the night anymore, and I feel so much more refreshed. No brain fog. Just clarity.”

A third commented on the long-term impact: “These have made a huge difference to my sleep routine. I used to struggle waking up at 7am — now I’m up before my alarm. Total game-changer.”

One user even claimed the supplement helped ease symptoms of insomnia, noting they hadn’t experienced a sleepless night since starting the capsules.

Sleep Deep isn’t the only supplement on the market promising better rest — but it’s currently one of the most talked about. Other options include SpaceNK’s You’re Looking Well Night Pill, which contains magnesium bisglycinate and L-theanine, priced at £32.50 for 30 days, and Holland & Barrett’s Novomins Night-Time Gummies, featuring magnesium, B12 and more at £19.99 for 60 pieces.

However, the combination of affordability and effectiveness seems to be why Protein Works’ formula is generating so much buzz. It also doesn’t hurt that the capsules are vegan-friendly, non-habit forming, and free from synthetic sleep drugs.

Of course, individual results vary — and anyone with ongoing sleep issues should speak to a GP. But for many exhausted Britons, this unassuming supplement has become a small but powerful addition to their nightly wind-down.

“Made an instant difference,” wrote one final reviewer. “Relaxes me and helps me drift off. Couldn’t ask for more.”