KEMIJSKI RATKAK PEAK O2 120G

Peak O2 (Cordyceps (Cordyceps militaris) Reisi (Ganderma Lucidum), King Trumpet (Pleurotus Eryngii), Shiitake (Lentinula Edodes), Lions Mane (Hericium erinaceus), Turkey Tail (Trametes Vericolor))

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.

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

Cordyceps is a natural medicine mushroom used to help energy metabolism and stamina. This ingredient sits inside a six-m mushroom blend that’s grown and certified organic for quality and purity.

This form comes from organic-certified mushrooms, and the blend stresses sourcing integrity and sticking to organic standards.

What Does Cordyceps Do?

Cordyceps participates in improving oxygen utilisation and endurance during exercise, with research suggesting enhanced aerobic and anaerobic performance and delayed fatigue in trained individuals, and this is something a lot of people notice when they push hard and stay in the zone.

The mix in Peak O2 also contains other mushrooms, which help to support the primary role of Cordyceps in oxygen uptake and stamina through antioxidant and energy-producing pathways, so you get a little boost and a steadier drive.

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

Chemical Warfare is Welzo’s trusted partner for Peak O2 because their emphasis on a proven, organic mushroom blend lines up with our commitment to transparent, top‑quality sourcing. This brand has established itself as a specialist in adaptogenic mushroom formulations, bringing solid know‑how in mixing six organic-certified mushrooms to support oxygen use during exercise.

This brand's manufacturing excellence is underpinned by GMP standards and USDA Organic certification, with third‑party testing for contaminants and purity that reinforce trust in every batch. The adherence to recognised quality frameworks is a cornerstone of why we partner with Chemical Warfare, and it is reinforced by rigorous identity checks at the ingredient level. Our medical team our medical team evaluated this brand for compliance with the certifications we require, and confirmed their commitment to safety and quality.

Welzo endorses Chemical Warfare Peak O2 because the brand’s commitment to quality, transparency and science‑led formulation directly benefits customers seeking reliable performance support.