Quick answer: Water carries nutrients, removes waste, cushions joints and regulates temperature, and even mild dehydration can contribute to fatigue, headaches, constipation and brain fog. Electrolytes such as sodium, potassium and magnesium help water get into cells. Drinking clean, filtered water and adding natural electrolytes when you sweat or eat low-carb supports hydration.
Key takeaways
Even mild dehydration can contribute to fatigue, headaches, constipation and foggy thinking.
Electrolytes such as sodium, potassium and magnesium help water move into cells, which matters most when you sweat or eat low-carb.
Filtered water and natural electrolyte sources are simple ways to make everyday hydration work better.
Quick answers
How much water should I drink a day?
Needs vary with body size, activity and climate. Pale yellow urine is a simple guide.
When do electrolytes matter?
During heavy sweating, heat, illness or low-carb eating, sodium, potassium and magnesium help water move into cells.
How can I choose cleaner water?
Check your local water quality report and consider a certified carbon or reverse osmosis filter.
Where can I find electrolyte products?
My practitioner-grade catalog includes electrolyte and mineral options.
Educational information only, not medical advice.
Why hydration matters
Water makes up a large share of body weight, and it transports nutrients and removes waste. It supports digestion and regular bowels, helps regulate temperature and blood pressure, and supports focus and mood.
Electrolytes
Sodium, potassium, magnesium, calcium and chloride help your nerves, muscles and heart work and help water move into cells. You need more during heavy sweating, heat, illness and low-carb eating.
Natural ways to add electrolytes
You can add a small pinch of sea salt to water (skip it if you are on a low-sodium diet), or add fresh lemon, lime or orange, cucumber or berries, or a splash of coconut water. Herbal teas such as hibiscus or nettle and broth are other natural options.
Choosing cleaner water
Start by checking your local water quality report. A certified filter (carbon or reverse osmosis) can reduce many contaminants, and you may want to consider remineralizing RO water. Spring or mineral water adds minerals, and it helps to limit water from plastic bottles, especially when left in heat.
Common tap water concerns include PFAS, lead from old pipes, nitrates and disinfection byproducts. See lowering everyday exposures and total exposure load.
Hydration and healthy aging
Thirst signals weaken with age, so older adults are more prone to dehydration. Good hydration supports kidney function, circulation, the lymphatic system and the cellular environment where mitochondria work.
When to see a naturopathic doctor
It may be time to see a naturopathic doctor if you often feel tired, headachy or constipated, or if you exercise heavily or follow a low-carb diet. The same is true if you have kidney or heart conditions and need personalized fluid guidance, or if you want help choosing a water filter.
See a medical provider promptly for confusion, fainting, very dark or no urine, or a racing heart, which can signal severe dehydration.
Want a personalized healthy-aging plan?
A free 15-minute consultation with Dr. Kneessi. No cost, no obligation. In-office or by telehealth.
Questions to bring to your clinician
These questions can help you get the most out of your next visit.
Given my activity level and diet, do I need electrolytes or is plain water enough?
What would be a gentle starting point for my hydration, given where I am right now?
Is there anything in my health history that would make my hydration need extra care?
How would we know that my hydration is helping me, and when should we check in?
Frequently asked questions
How much water should I drink a day?
Needs vary with body size, activity and climate. Pale yellow urine is a simple guide.
Do I need electrolytes?
During heavy sweating, illness, heat or low-carb eating, electrolytes help.
Is alkaline water healthier?
There is limited evidence for special benefits. Clean, mineral-containing water is a good choice.
Can you drink too much water?
Yes. Drinking excessive water without electrolytes can lower blood sodium.
Sources
- Armstrong LE, et al. Mild dehydration affects mood in healthy young women. J Nutr 2012. PMID: 22190027. https://pubmed.ncbi.nlm.nih.gov/22190027/
- Arnaud MJ. Mild dehydration: a risk factor of constipation? Eur J Clin Nutr 2003. PMID: 14681719. https://pubmed.ncbi.nlm.nih.gov/14681719/
- Kenney WL, Chiu P. Influence of age on thirst and fluid intake. Med Sci Sports Exerc 2001. PMID: 11528342. https://pubmed.ncbi.nlm.nih.gov/11528342/
- Qian N, et al. Rapid single-particle chemical imaging of nanoplastics by SRS microscopy. Proc Natl Acad Sci U S A 2024. PMID: 38190543. https://pmc.ncbi.nlm.nih.gov/articles/PMC10801917/
- Smalling KL, et al. Per- and polyfluoroalkyl substances (PFAS) in United States tapwater: Comparison of underserved private-well and public-supply exposures and associated health implications. Environ Int 2023. PMID: 37356308. https://pubmed.ncbi.nlm.nih.gov/37356308/
- MedlinePlus: Water in Diet
- MedlinePlus: Fluid and Electrolyte Balance
- EPA: PFAS
This article is for educational purposes only and is not medical advice. It does not replace an individual evaluation. Talk with your healthcare provider before starting supplements or changing medications, especially if you are pregnant, nursing, or managing a health condition.
Free: The 28-Day Reset for Energy and Focus
A simple day-by-day email guide to sleep, movement, food, and daily habits that support healthy aging. It’s free, and you can unsubscribe anytime.
Get the free guide Take the supplement quiz
