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    Kinn: Evening Ritual

    Kinn: Evening Ritual

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    Six ingredients, at the doses the studies used.

    We read the published research one ingredient at a time.

    Jujube seed

    500mg

    For a mind that won't settle

    The seed of the sour jujube, used in Chinese medicine for over two thousand years. We use a standardised extract, so every sachet carries the same measured amount rather than whatever a batch of raw powder happens to contain.

    Mahmoudi 2020 · 106 women

    Glycine

    3,000mg

    For calmer evenings

    An amino acid your body already makes. Taken before bed it works overnight rather than in the glass. The trials that found an effect used 3g. Most supplements that list glycine use 500mg, a sixth of that.

    Nutrients 2024 · 4 trials at 3g

    Magnesium

    250mg

    For tiredness and fatigue

    Magnesium bound to an amino acid, which the body absorbs better than the magnesium oxide used in cheaper supplements. An adult woman needs around 270mg a day. One sachet gives 250mg. Most supplements give 150mg.

    Nat. Sci. Sleep 2025 · 155 adults

    L-theanine

    400mg

    For taking the edge off

    An amino acid found in green tea. It takes the edge off without sedating. Trials have used 200 to 400mg. We use 400.

    Mol. Psychiatry 2026 · 31 trials

    Hyaluronic acid

    120mg

    For skin hydration

    The molecule skin uses to hold water, and your body makes less of it as you get older. We use sodium hyaluronate at 120mg, the same form and the same amount as the trial.

    Scientific Reports 2025 · 150 adults

    Vitamin C

    80mg

    For collagen, and your skin

    Your body cannot build collagen without it. That is chemistry rather than a claim: without vitamin C the collagen your skin makes does not hold together. 80mg is a full day's intake for an adult. We use sodium ascorbate, a non-acidic form that is gentler in a nightly drink.

    Nutrients 2017 · vitamin C and skin

    What we left out

    Ashwagandha

    The one everyone expects. It can affect thyroid hormone levels, and thyroid conditions are more common in women, and more common again with age.

    Melatonin

    A prescription medicine in the UK rather than a supplement, so it was never an option for a nightly drink. It also does a narrower job than most people expect: it shifts the timing of your body clock rather than making you sleepy.

    Valerian

    You'll find it in plenty of night-time teas, which blend and sweeten around its smell. The evidence is the problem. People report sleeping better on it, but the effect shrinks in the better-designed trials and doesn't show up when sleep is measured rather than self-reported.

    Ten ingredients in total. The other four are natural flavouring, citric and malic acid for the sharpness, stevia, and an anti-caking agent.

    Nutrition label

    Per sachet
    Energy 84kJ / 20kcal
    of which sugars 0g

    Active ingredients

    Active ingredients Per sachet%NRV
    Magnesium as bisglycinate 250mg67%
    Glycine 3,000mg†
    L-theanine 400mg†
    Jujube seed extract 500mg†
    Vitamin C as sodium ascorbate 80mg100%
    Hyaluronic acid as sodium hyaluronate 120mg†

    NRV: Nutrient Reference Value. † No NRV established.

    How to take it

    Tear one sachet into a glass, add cold water or tonic and ice, or warm water if you'd rather, and stir until it dissolves.

    Recipes

    One Kinn, eight drinks.

    Cold over ice or warm in a mug. Tap one to see how it's made.

    • Kinn and Tonic: a stemmed copa glass of Kinn over ice with a curl of lemon peel

      Kinn & Tonic

      Light tonic, ice, lemon.

    • The Kinn Spritz: a tall highball of Kinn over ice with a lemon wheel down the side

      The Kinn Spritz

      Soda, ice, a lemon wheel.

    • Kinn on the Rocks: a short ribbed tumbler of Kinn over ice with nothing added

      Kinn on the Rocks

      Just cold water and ice.

    • Kinn and Raspberry: a wine glass of Kinn with crushed raspberries fading red into gold

      Kinn & Raspberry

      Crushed raspberries, soda.

    • Kinn and Grapefruit: a short ribbed tumbler of Kinn over one big cube with a pink grapefruit wheel

      Kinn & Grapefruit

      Pink grapefruit, soda, ice.

    • Kinn and Mint: a tall ribbed glass of Kinn over ice with a spray of fresh mint

      Kinn & Mint

      Fresh mint, soda, ice.

    • Kinn and Basil: a coupe of Kinn with basil leaves floating flat on the surface

      Kinn & Basil

      Basil leaves, soda, ice.

    • The Kinn Warmer: a glass mug of hot Kinn with steam rising

      The Kinn Warmer

      Hot water, off the boil.

    Kinn
    A good day starts the night before.
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