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Healthy ageing

Hydration For Seniors

Low-intake dehydration is the most commonly reported fluid and electrolyte imbalance in older adults, and it is often missed. These are the published prevalence figures, the practical signs, and formats that are easy to drink every day.
Shop everyday picksRead the research

General information only. If you take medication — particularly diuretics, blood pressure or kidney medicines — talk to your GP or pharmacist before adding sodium.

24%
of older adults were dehydrated in a meta-analysis using directly measured serum osmolality above 300 mOsm/kg.
Systematic review of 61 studies, 22,398 participants, 2023
34% vs 19%
Dehydration prevalence in long-term care residents compared with community-dwelling older adults.
Same meta-analysis, subgroup results
~1 in 5
patients in an Australian geriatric rehabilitation ward were found to be dehydrated.
Cited in Nutrients systematic review of hydration interventions

What the research says

A quarter of older adults, by the most reliable measure

A 2023 systematic review and meta-analysis screened 11,077 records and pooled 61 studies covering 22,398 non-hospitalised participants aged 65 and over. Using directly measured osmolality above 300 mOsm/kg — the most reliable measure — it estimated that 24% were dehydrated.

Low-intake dehydration prevalence in non-hospitalised older adults: systematic review and meta-analysis. Clinical Nutrition, 2023.

Illness raises the odds further

In subgroup analyses, older adults with more pre-existing illnesses showed 37% prevalence against 15% in others, with a non-significant suggestion that those with renal impairment were higher again at 42%. Notably, there were no clear differences by age, sex, functional, cognitive or diabetic status.

Clinical Nutrition, 2023 — subgroup analyses.

It is hard to self-detect

Intake is frequently inadequate: nursing homes have reported inadequate fluid intake among 50–90% of residents. A 2020 study reported that 60% of older participants overestimated how much fluid loss it takes for moderate-to-severe symptoms to appear, and most could not identify whether they were dehydrated.

Nutrients systematic review of hydration interventions (PMC8537864); study cited in Australian Ageing Agenda.

Dehydration prevalence by groupPooled prevalence from the 2023 meta-analysis, measured by directly measured serum or plasma osmolality.

Community-dwelling19%
95% CI 0.00–0.48
All older adults (pooled)24%
95% CI 0.07–0.46
Long-term care residents34%
95% CI 0.09–0.61
More pre-existing illnesses37%
Against 15% in those with fewer
Renal impairment42%
Non-significant suggestion only

Source: Clinical Nutrition, 2023. Heterogeneity was high and GRADE quality of evidence was rated low for exact prevalence.

Screening and detectionWhat clinicians use, and why everyday self-assessment falls short.

MethodPerformanceNote
Serum osmolality>300 mOsm/kgThe reference measure used in the pooled prevalence estimate
Tongue dryness64% sensitivity, 62% specificityValidated as a practical bedside screen in an Australian geriatric unit
Self-assessmentPoor60% of older participants overestimated the loss needed for symptoms
Care-home drink recordsUnreliableObserved intake differed substantially from recorded intake in the UK FISE study

QUT ePrints thesis (tongue dryness); Clinical Nutrition 2023; Australian Ageing Agenda.

Everyday signs worth acting onPractical prompts rather than a diagnosis. Dehydration in older adults has been described as a contributor to urinary tract infections, delirium, falls and hospitalisation.

Dry mouth or tongue
Tongue dryness is the screen validated in the Australian study.
New confusion or drowsiness
Changes in alertness should prompt a call to the GP, not a supplement.
Dizziness on standing
Especially if paired with a recent fall or near-fall.
Drinking under 6 cups a day
Inadequate intake is reported in 50–90% of nursing-home residents.
Thickened fluids in use
Patients on thickened fluids consumed on average 23.4% of requirements in one acute-setting study.
Hot spell or illness
Fever, vomiting and heatwaves all raise losses quickly.

Dehydration in older adults can be serious. If someone is confused, very drowsy or unable to keep fluids down, seek medical help immediately.

Everyday picks for older adultsUnflavoured and mild options mix into water, tea or juice without a strong taste. Tubs avoid fiddly sachets. Sodium content matters — check with your GP or pharmacist first if you are on fluid or blood pressure medication.

LMNT Raw Unflavoured Electrolyte Mix - 30 Sticks showing individual packets with sodium, potassium, and magnesium content labels

LMNT Raw Unflavoured Electrolyte Mix - 30 Sticks

LMNT

$64.95

Unflavoured — add it to a hot drink or soup without adding a flavour to think about.

Re-Lyte Hydration - Unflavoured - Tub - 75 Serves dietary supplement container with black lid and blue label highlights

Re-Lyte Hydration - Unflavoured - Tub - 75 Serves

Redmond

$84.95

Mixes into tea, water or juice without changing the taste. An adjustable scoop for a lighter or stronger dose.

BioTrace CMD Concentrated Mineral Drops - 240ml bottle showing mineral blend with natural source, bio-available and additive-free label.

CMD Concentrated Mineral Drops - 240ml

BioTrace

$49.95

A few drops into whatever you are already drinking — no separate mixing or a sachet to open.

Also stocked for seniors

Mineral Balance - Essential Electrolytes - 450g by Ancient Lakes in resealable pouch for hydration support and active lifestyles

Mineral Balance - Essential Electrolytes - 450g

Ancient Lakes

$24.95
Sodii Salty Variety Pack - 8 Sachets with colorful electrolyte sachets for hydration, part of Drinks and Electrolytes collections.

Salty Variety Pack - 8 Sachets

Sodii

$16.90
Sodii - Single Sachet in salty pineapple flavor for hydration salts, part of Drinks and Electrolytes collections.

Sodii - Single Sachet

Sodii

$2.75
Ocean Sourced Electrolyte Drops - 240ml in blue bottle with silver cap by Aussie Trace Minerals, dietary minerals supplement

Ocean Sourced Electrolyte Drops - 240ml

Aussie Trace Minerals

$40.95
Sodii Salty Pineapple - 30 Sachets electrolyte drink mix packaging for everyday hydration and keto-friendly use

Salty Pineapple - 30 Sachets

Sodii

$68.90
Salty Citrus - 30 Sachets hydration salts by Sodii with green-blue gradient box, part of Drinks and Electrolytes collections

Salty Citrus - 30 Sachets

Sodii

$68.90
Electrolyte Drops - 250ml by SALTT in black and white bottle packaging from Drinks and Low Carb collections

Electrolyte Drops - 250ml

SALTT

$39.95
SALTT Clean Slate (Unflavoured) Electrolyte Drink Mix - 30 Sticks with minerals, from Drinks and SALTT Electrolytes collections

Clean Slate (Unflavoured) Electrolyte Powder - 30 Sticks

SALTT

$66.95
Salty Passionfruit - 30 Sachets

Salty Passionfruit - 30 Sachets

Sodii

$68.90
Salty Raspberry - 30 Sachets by Sodii, hydration salts for Drinks, Electrolytes, New Arrivals, Dirty Keto, Low Carb collections

Salty Raspberry - 30 Sachets

Sodii

$68.90
Ancient Lakes Keto Blend - 425g electrolyte powder in white resealable pouch for low-carb and fasting support

Keto Blend - 425g

Ancient Lakes

$24.95
Unflavoured - 30 Sachets by Sodii featuring Everyday Hydration Salts, from Drinks, Electrolytes, and Low Carb collections

Unflavoured - 30 Sachets

Sodii

$64.90
Salty Pineapple - 30 Serve Tub by Sodii with Everyday Hydration Salts, part of Drinks and Electrolytes collections

Salty Pineapple - 30 Serve Tub

Sodii

$63.90
Unflavoured - 30 Serve Tub by Sodii, hydration salts in blue gradient jar from Drinks and Electrolytes collections

Unflavoured - 30 Serve Tub

Sodii

$59.90
Salty Passionfruit - 30 Serve Tub

Salty Passionfruit - 30 Serve Tub

Sodii

$63.90
SALTT Electrolyte Drops - 120ml bottle with dropper, designed for balanced hydration and electrolyte support.

Electrolyte Drops - 120ml

SALTT

$24.95
Salty Citrus - 30 Serve Tub by Sodii with Everyday Hydration Salts, part of Drinks and Electrolytes collections

Salty Citrus - 30 Serve Tub

Sodii

$63.90
Sodii Salty Grapefruit - 30 Sachets electrolyte drink mix with natural ingredients for keto and low carb hydration

Salty Grapefruit - 30 Sachets

Sodii

$68.90
Magnesium Enriched Natural Lake Salt. - 425g black resealable pouch by Ancient Lakes for Drinks and Electrolytes collections

Magnesium Enriched Natural Lake Salt. - 425g

Ancient Lakes

$18.95
Ocean Sourced Electrolyte Drops - 60ml in blue bottle with silver cap by Aussie Trace Minerals for hydration support.

Ocean Sourced Electrolyte Drops - 60ml

Aussie Trace Minerals

$21.95
Bottle of Daily Minerals - 946ml by SALTT with black label from Electrolytes and Functional collections.

Daily Minerals - 946ml

SALTT

$119.95
Salty Raspberry - 30 Serve Tub by Sodii with hydration salts in gradient red and blue packaging from Drinks and Electrolytes collections

Salty Raspberry - 30 Serve Tub

Sodii

$63.90
BioTrace Magnesium Bisglycinate - 60 Capsules dietary supplement bottle highlighting gluten-free and non-GMO features.

Magnesium Bisglycinate - 60 Capsules

BioTrace

$44.95
Natural Liquid Magnesium - 200ml bottle by Ancient Lakes, mineral drops from functional electrolyte collection.

Natural Liquid Magnesium - 200ml

Ancient Lakes

$49.95
Salty Kiwi - 30 Sachets by Sodii in green blue box and sachet from Drinks Electrolytes Functional New Arrivals collections

Salty Kiwi - 30 Sachets

Sodii

$68.90
Salty Grapefruit - 30 Serve Tub by Sodii with hydration salts in gradient orange to blue packaging for low carb and keto use

Salty Grapefruit - 30 Serve Tub

Sodii

$63.90
Salty Mandarin - 30 Sachets by Sodii with Everyday Hydration Salts in orange and white packaging for electrolyte drinks

Salty Mandarin - 30 Sachets

Sodii

$69.95
Natural Liquid Magnesium - 95ml by Ancient Lakes, sold at LYTES Australia

Natural Liquid Magnesium - 95ml

Ancient Lakes

$34.95
Salty Kiwi - 30 Serve Tub by Sodii, electrolyte hydration salts from Drinks, Electrolytes, and Low Carb collections.

Salty Kiwi - 30 Serve Tub

Sodii

$64.95
Clear bottle of Keto Chow Electrolyte Capsules - 240 Serves with white capsules and label highlighting balanced electrolytes and no added sugar

Electrolyte Capsules - 240 Serves

Keto Chow

$79.95
Keto Chow Fasting Drops - 250ml bottle featuring concentrated sodium and magnesium for electrolyte support.

Fasting Drops - 250ml

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$42.95
ConcenTrace - Trace Mineral Drops - 237ml by Trace Minerals in blue bottle with orange cap, part of Electrolytes and Drinks collections

ConcenTrace - Trace Mineral Drops - 237ml

Trace Minerals

$79.95
Salty Mandarin - 30 Serve Tub by Sodii with everyday hydration salts in orange and blue gradient jar design

Salty Mandarin - 30 Serve Tub

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$64.95
Elemental Magnesium - 60mL in blue dropper bottle by BioTrace for electrolytes, low carb, and functional health collections

Elemental Magnesium - 60mL

BioTrace

$29.95
Lemon Lime Electrolyte Drops - 60ml bottle from Aussie Trace Minerals with blue label and silver cap on white background

Lemon Lime Electrolyte Drops - 60ml

Aussie Trace Minerals

$25.95
Elite Ion-Power Electrolytes liquid supplement by BioTrace in white bottle with black and blue label, 240ml size

Elite Ion-Power Electrolytes

BioTrace

$49.95
Complete Ocean Electrolyte Powder - 60 servings by Aussie Trace Minerals in black container with silver lid, unflavored formula

Complete Ocean Electrolyte Powder - 60 servings

Aussie Trace Minerals

$59.95
Magnesium Drops - 250ml bottle featuring Ionic Magnesium Chloride with sodium and potassium by Keto Chow

Magnesium Drops - 250ml

Keto Chow

$42.95
CMD Concentrated Mineral Drops - 120ml bottle by BioTrace with multi-mineral formula and natural bio-availability branding.

CMD Concentrated Mineral Drops - 120ml

BioTrace

$34.95
Sodii Salty Chocolate - 30 Sachets electrolyte hydration salts designed for keto and low carb lifestyles, featuring everyday hydration with Lake Deborah ancient lake salt.

Salty Chocolate - 30 Sachets

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40,000 Volts - Electrolyte Concentrate - 237ml bottle by Trace Minerals for stamina, energy, and muscle cramp support

40,000 Volts - Electrolyte Concentrate - 237ml

Trace Minerals

$42.95
Peppermint Electrolyte Drops - 60ml bottle by Aussie Trace Minerals with blue label and silver cap on white background

Peppermint Electrolyte Drops - 60ml

Aussie Trace Minerals

$25.95
Ionic Magnesium - 400mg - 118ml dietary supplement bottle by Trace Minerals in blue glass with dropper cap

Ionic Magnesium - 400mg - 118ml

Trace Minerals

$39.95
Salty Chocolate - 30 Serve Tub by Sodii featuring Everyday Hydration Salts in a sleek brown and blue container for keto and low carb hydration.

Salty Chocolate - 30 Serve Tub

Sodii

$64.90
Keto Electrolyte Drops -118ml in blue glass bottle by Trace Minerals for hydration and electrolyte balance support

Keto Electrolyte Drops -118ml

Trace Minerals

$42.95
Magnesium Capsules - 240 caps dietary supplement by Keto Chow in white bottle, suitable for Keto and Vegan collections.

Magnesium Capsules - 240 caps

Keto Chow

$79.95
ConcenTrace - Trace Mineral Drops - 118ml in blue bottle with orange dropper, supporting hydration and energy by Trace Minerals

ConcenTrace - Trace Mineral Drops - 118ml

Trace Minerals

$54.95
Magnesium Topical Spray - 125ml - LYTES

Magnesium Topical Spray - 125ml

Ancient Lakes

$29.95
Ocean Trace - 60 Serves hydration powder container by Edge Electrolytes with ocean-derived electrolytes and 60 servings.

Ocean Trace - 60 Serves

Edge Electrolytes

$52.95
Electrolyte Capsules - 100 Capsules

Electrolyte Capsules - 100 Capsules

Vitassium

$79.95
Trace Minerals Low Sodium Mega-Mag - 400mg - 118ml dietary supplement in blue dropper bottle packaging

Low Sodium Mega-Mag - 400mg - 118ml

Trace Minerals

$39.95
Athlete Hydration Powder - 30 Serves white container by Edge Electrolytes with ocean electrolytes and magnesium badge

Athlete Hydration Powder - 30 Serves

Edge Electrolytes

$42.95
Extra Strength Electrolyte Capsules - 100 Capsules

Extra Strength Electrolyte Capsules - 100 Capsules

Vitassium

$89.95
Ionic Magnesium - 400mg - 59ml dietary supplement in blue dropper bottle by Trace Minerals, part of Electrolytes and Functional collections

Ionic Magnesium - 400mg - 59ml

Trace Minerals

$29.95
Electrolyte Capsules - Buffered - 100 Capsules

Electrolyte Capsules - Buffered - 100 Capsules

SaltStick

$69.95
Sodii Raw Electrolyte Honey box of 20 sachets with a single sachet, Salty Honey

Sodii Raw Electrolyte Honey - 20 Sachets

Sodii

$99.95
Single 34 g sachet of Sodii Raw Electrolyte Honey, Salty Honey

Sodii Raw Electrolyte Honey - Single Sachet

Sodii

$5.50
Electrolyte Capsules + Caffeine - 100 Capsules

Electrolyte Capsules + Caffeine - 100 Capsules

SaltStick

$79.95

Compare the formatsSodium bands are relative across the range. Read the label on the pack you buy and check it against any medical advice you have been given.

ProductFormatServesSodium per serveSugarSuits
Re-Lyte Hydration — UnflavouredTub, scoop75ModerateNoneAdding to tea, water or juice without changing the taste
LMNT Raw UnflavouredStick sachets30High — 1,000 mgNoneAdding to a hot drink or soup
CMD Concentrated Mineral DropsDropsAdjustable doseCheck labelCheck labelA few drops into any drink, no mixing
Re-Lyte Hydration Support CapsCapsules120 capsulesCheck labelCheck labelNo mixing or taste at all

Sodium figure for LMNT from the product label (1000 mg sodium, 200 mg potassium, 60 mg magnesium per stick). Other sodium and sugar figures on this page have not been independently confirmed and are marked “Check label” rather than estimated.

Myth vs fact

MythIf you are thirsty, you will drink — thirst handles it.
FactA 2020 study reported that 60% of older participants overestimated how much fluid loss is needed before moderate-to-severe symptoms appear, and most could not tell whether they were dehydrated.
MythIt is only a problem in nursing homes.
FactThe 2023 meta-analysis found 19% prevalence among community-dwelling older adults, against 34% in long-term care.
MythAge itself determines the risk.
FactIn the subgroup analyses, there were no clear differences by age, sex, functional, cognitive or diabetic status — but there were by illness burden, 37% against 15%.
Low sugar options Filter by sugar-free electrolytes
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References

  1. Low-intake dehydration prevalence in non-hospitalised older adults: systematic review and meta-analysis. Clinical Nutrition, 2023.
  2. Interventions to improve hydration in older adults: a systematic review and meta-analysis. Nutrients. PMC8537864.
  3. Screening and identification of dehydration in older people admitted to a geriatric and rehabilitation unit. QUT ePrints.
  4. Trends in dehydration in older people: identifying landmark scientific contributions. PMC11767598.
  5. Dehydration testing in residential aged care — project summary. ARIIA.

This page is general information about hydration and electrolyte products, not medical or dietary advice, and nothing here is intended to diagnose, treat, cure or prevent any condition. Electrolyte products add sodium and potassium to the diet, which is not appropriate for everyone — particularly people with kidney, heart or blood pressure conditions, or those on fluid restrictions or diuretics. Read the label, follow the directions for use, and speak with your GP or pharmacist first.

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Hydration after 65, answeredAnswers to what shoppers ask us most. These same answers power the FAQ schema on this page.

A 2020 study reported that 60% of older participants overestimated how much fluid loss is needed before moderate-to-severe symptoms appear, and most could not tell whether they were dehydrated.

The 2023 meta-analysis found 19% prevalence among community-dwelling older adults, against 34% in long-term care.

In the subgroup analyses, there were no clear differences by age, sex, functional, cognitive or diabetic status — but there were by illness burden, 37% against 15%.

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Take our quiz and we will match you to a brand and format based on how you ride, or start with a taster pack and try a few before committing to a full size.

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