Naughty Boy Winter Soldier - Blackout - 150 caps

Glycine, Zylaria (Xylaria Nigripes Mycelia Extract), Magnolia Offcinalis Extract 90%, Apigenin, BioPerine (Black Pepper Fruit Extract), Glycine, Zylaria (Xylaria Nigripes Mycelia Extract), Magnolia Offcinalis Extract 90%, Apigenin, BioPerine (Black Pepper Fruit Extract)

United Kingdom & Rest of the World Shipping Details:
Same day dispatch for orders placed by 2pm (Orders after 2pm dispatched next working day).

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 14 days in the same original and unopened packaging. Subject to T&C's.

Welzo is a UK-based health platform. Orders ship from the UK.

As a dietary supplement, consume 5 capsules 20 to 30 minutes before bedtime to help maximise sleep and recovery benefits. Store in a cool, dry place out of direct sunlight. This product should not be used as a substitute for a varied, balanced diet. Keep out of reach of children.

Please consult the product packaging for accurate instructions on how to use the product.

*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

The Active Ingredient Is: Glycine

Glycine is an amino acid that helps with normal neurotransmission and supports restful states. It is the primary active component in this sleep-support formulation.

This form is used as a high‑purity amino acid supplement to help with its role in sleep related pathways and to optimise absorption when paired with complementary actives.

What Does Glycine Do?

Glycine is involved in promoting sleep onset and improving perceived sleep quality, with data indicating benefits for deeper rest and cognitive function upon waking. Dr. Yamadera of Osaka University reported improvements in sleep measures associated with glycine use.

The amino acid helps to support normal inhibitory neurotransmission and temperature regulation, aligning with guidance on sleep health (which is important) and wellbeing.

*This product is not intended to diagnose, treat, cure, or prevent any disease.

Naughty Boy is Welzo’s chosen brand for Winter Soldier Blackout because it stands out with a premium sleep support approach centred on branded actives like Zylaria™ and BioPerine®, delivering a clear, traceable formulation that our team recognises for quality and consistency. This brand’s use of patented Zylaria™ reflects a commitment to advanced ingredient science and standardised extracts, highlighting a strong heritage in premium, scientifically informed sleep support. Our evaluation also noted the transparency of key actives, reinforcing a trustworthy supply chain and consistent potency across batches.

This brand aligns with Welzo’s quality and safety values, and its manufacturing philosophy emphasises high-quality actives and absorption-enhancing technology. Our medical team reviews such formulations for suitability within our portfolio, supported by our quality certification process, and we lean on the expertise of our medical team to ensure responsible guidance. This partnership is particularly well suited to the British market, offering a boutique, research-backed sleep support option with clear dosing and premium ingredients.