What is 25ppm deuterium depleted water?

25ppm deuterium depleted water is water that has been processed to contain just 25 parts per million of deuterium, significantly lower than the approximately 150ppm found in regular drinking water. 25ppm represents one of the most depleted concentrations referenced in published research on deuterium depleted water (DDW).

How much deuterium depleted water should I drink per day?

Research protocols vary depending on the context and individual circumstances. Many published studies reference daily intakes of between 0.5 and 1.5 litres of DDW per day. Always consult your healthcare provider before making significant changes to your hydration routine.

Can I dilute Yavelle 25ppm with regular water?

Yes. Many people following a deuterium depletion protocol choose to dilute 25ppm DDW with regular drinking water to achieve intermediate concentrations such as 75ppm, 105ppm, or 125ppm. Use our DDW Dilution Calculator at yavelle.com to work out the exact ratio for your target concentration.

How long does one box of Yavelle last?

One box contains 24 x 500mL bottles providing 12 litres in total. At 500mL per day it lasts approximately 24 days. At 1 litre per day it lasts approximately 12 days. At 1.5 litres per day it lasts approximately 8 days.

What is the difference between deuterium depleted water and regular water?

Regular drinking water contains approximately 150 parts per million of deuterium, a naturally occurring stable isotope of hydrogen. Deuterium depleted water has been processed to reduce this concentration. Yavelle is produced at 25ppm, approximately 83% less deuterium than regular drinking water.

What does the research say about deuterium depleted water?

Scientific interest in deuterium depleted water dates back to the 1960s. Researchers including Dr László G. Boros, Professor Thomas Seyfried, and Professor Stephanie Seneff have contributed significantly to this field. Studies have been conducted across Hungary, the United States, and Europe across a range of clinical and wellness contexts. This information is provided for educational purposes only and does not constitute medical advice.

Is deuterium depleted water safe to drink?

Deuterium depleted water has been consumed by research participants in published clinical studies for decades with no reported adverse effects from the water itself. It contains no additives, sweeteners, flavours, or preservatives. As with any change to your diet or hydration routine, consult your healthcare provider before use.

Where is Yavelle available?

Yavelle is available online at yavelle.com with free shipping across the USA and Australia. Yavelle is also stocked at Nordstrom and Debenhams in the United States. Coming soon to Myer and Virgin in Australia, KrisShop via Singapore Airlines, and Holland and Barrett and Rackhams in the United Kingdom.

How does the Yavelle subscription work?

Subscribe to receive Yavelle automatically every month and save 5% on every order. Choose 1, 2, 3, or 4 boxes per month depending on your protocol. You can pause, skip, or cancel your subscription at any time with no lock in contracts or cancellation fees.

How is Yavelle shipped in the USA?

Yavelle is stocked in the USA for fast domestic fulfilment. All US orders ship free with standard delivery estimated at 2 to 5 business days. There are no customs fees or import delays.

Why is Yavelle packaged in PET plastic bottles?

Yavelle chose recyclable PET plastic over glass to significantly reduce the weight and carbon footprint of shipping, particularly over long distances, while maintaining the integrity of the water. PET plastic does not affect the deuterium concentration of the water.

Yavelle was founded by Anthony and Kamila Kingston, Australian health researchers and practitioners with over 25 years of experience in the health and education fields. Their interest in deuterium depleted water began in 2024 during personal research into the scientific literature on deuterium and cellular function.

Pure Silk Lined Sports Cap

Sky Blue

$40.00

Pure Silk Lined Sports Cap

$40.00

🌳 Every Yavelle order plants one tree and removes one ocean-bound plastic bottle through our verified reforestation and ocean cleanup programme.
Trees are GPS tracked and monitored through their critical first years of growth. Learn more about our sustainability commitment.

Color Sky Blue White Navy Black

Protect your hair while you wear it. The White Lotus Silk Lined Sports Cap pairs a practical cotton outer with a lining of 100% pure silk, so your hair glides against the fabric instead of catching and pulling the way it does inside an ordinary cotton or synthetic cap.

That smooth silk surface reduces the daily friction that frays and breaks hair at the hairline, temples and crown, which makes it a thoughtful choice for anyone with fine, thinning, frizzy, coloured or textured hair. It is light, breathable and built for everyday wear, whether you are heading out for a walk, training, or simply having a low hair day.

Why you will love it

Lining of 100% pure silk that lets hair move freely without snagging
Soft, durable cotton outer in a clean logo free design
One size fits all with an adjustable back to suit most head sizes
Breathable silk that helps regulate temperature and moisture across the scalp
Made with ethical peace silk and PETA approved, with a one year guarantee
Available in Sky Blue, White, Navy and Black

Caring for your cap

Hand wash in cool water with a gentle detergent made for silk and delicates. Do not machine wash on a hot cycle, wring or tumble dry. Reshape and lay flat or air dry away from direct sunlight to keep the silk lining smooth.

Frequently asked questions

How does a silk lined cap help my hair?
Cotton and synthetic linings drag against the hair as you move, which can pull and break strands over a day of wear. The pure silk lining lets hair slide freely and reduces that friction. It is a small change that matters most for hair that is already fine or fragile.

What is the lining made from?
The interior is 100% pure silk produced using peace silk methods, where the silkworms are not killed. The cap is PETA approved.

Will it fit my head?
The cap is one size fits all with an adjustable back, so it suits a wide range of head sizes from smaller to larger.

Can I wear it for exercise?
Yes. The outer is durable and practical for training and everyday wear, while the silk lining keeps protecting your hair the whole time it is on.

How do I wash it?
Hand wash gently in cool water and lay flat to dry. Avoid hot washes, wringing and tumble drying so the silk stays smooth.