Why lemon water is so popular – and what’s really behind it
Lemon water in the morning is much more than a trend for many – it’s become a bit of a ritual. But we can pimp it a little: activated charcoal lemonade! This was actually the first drink of this year’s juice cleanse, and I was absolutely delighted with it. A glass of warm water with freshly squeezed lemon is said to stimulate the metabolism, aid digestion, help detox and even support weight loss. A perfect start to the day – at least that’s what they promise. And with activated charcoal on top?
But what does science actually say about this yellow classic? And how can lemon water be usefully enhanced – for example, with activated charcoal or psyllium husks?
The real hero: water
Before we talk about superfoods and supplements, we should appreciate what is already in the glass as a matter of course: water. After a night without hydration, our body is dehydrated – without us even realising it.
👉 On average, we lose 0.5 to 1 litre of water overnight – through breathing, skin perspiration/sweating and nighttime visits to the toilet. This is often noticeable in the morning: dry mouth, slight headache, heavy circulation. A large glass of water after getting up helps to balance this out. It gets the circulation going, stimulates the kidneys, and supports natural detoxification – without any magical “detox”. Our body knows how to help itself very well if we provide it with the right little helpers.

What can lemon water really do?
💧 Hydration
The most important effect is and remains: Hydration. Whether with or without lemon, drinking in the morning helps to reboot the system.
🍋 Vitamin C
Lemons provide around 30-50 mg of vitamin C – a good contribution, but not enough for the entire daily requirement. After all, vitamin C supports the immune system, has an antioxidant effect and helps with iron absorption.
🔄 Stabilise blood sugar levels
Exciting: Studies show that lemon juice can flatten the blood sugar response to starchy meals – similar to apple cider vinegar. This means that your blood sugar level rises less quickly than without lemon water, and therefore falls less drastically. Ideal for breakfast with bread, oatmeal or muesli.
🗿 Kidney stones?
According to some studies, citric acid (citrate) can inhibit the formation of certain kidney stones. However, the data is not conclusive. Anyone affected should have the effect clarified by a doctor on an individual basis.⚖️
⚖️ Lose weight?
Lemon water itself only stimulates the metabolism subliminally. What does help, however, is to drink 500 ml of water 30 minutes before a meal – this can increase the feeling of satiety. The lemon is more of a flavour carrier than a fat burner.
What lemon water can’t do
Unfortunately, the myth that lemon water can “alkalise” or actively “detoxify” the body persists. In fact:
- The pH value of the blood is not directly influenced by food – the body itself regulates this very closely. However, our lifestyle does have an indirect influence on our physical condition and therefore also, for example, on inflammation and our body’s ability to deal with it. There is already a blog post on this topic entitled “Acid-base balance – Why we should care”.
- There is no targeted “detoxification” via drinks – the liver, kidneys, skin and intestines are responsible for this. And they do their job pretty well. Provided we give them the optimum “working conditions” through our diet and lifestyle. Here too, we have no direct influence on our physical functions, but an indirect one. For example, with the right ingredients – such as lemons or activated charcoal – we can positively support natural detoxification* (see studies in the appendix).
Possible disadvantages – what you should know
As beneficial as lemon water is, it is not recommended for everyone without restrictions.
- Tooth enamel: Citric acid can attack tooth enamel. Therefore: dilute, drink with a straw, then rinse your mouth with water – and don’t brush your teeth straight away (wait at least 30 minutes).
- Reflux/heartburn: If you have a sensitive stomach or reflux, the acid can increase discomfort.
- Interactions with medication: Activated charcoal is known for its adsorption capacity – this means that it can bind to active ingredients and inhibit their absorption in the intestine.
‼️ Important: If you are taking medication, drink activated charcoal drinks at different times (at least 2 hours apart) to avoid possible interactions.
Cold or warm – which is better?
The temperature of your lemon water is a matter of taste – but it does influence the effect:
🌡️ Lukewarm – ideal in the morning
A glass of lukewarm lemon water immediately after getting up:
- is particularly well absorbed by the body,
- is easy on the stomach,
- gently stimulates digestion and
- helps to stabilise the circulation.
Perfect for anyone who needs a kick to get going in the morning.
❄️ Cold – refreshing & activating
The cold version – especially in combination with mint, ginger or activated charcoal – is ideal as a refreshment during the day or after sport. It:
- provides a small energy boost,
- cools from the inside,
- has a revitalising effect and
- helps to compensate for fluid loss during heat or exertion.
So you can vary depending on your mood, the season and the time of day – the main thing is that you drink!

Activated charcoal – black powder with a powerful effect?
Activated charcoal (also known as medicinal charcoal or activated charcoal powder) may look inconspicuous, but it is anything but boring. It has been used in naturopathy, cosmetics and even in drinking water treatment for centuries – and is currently experiencing a real comeback in smoothies, toothpaste and even in my activated charcoal lemonade aka lemon water 2.0 version.
What is activated charcoal?
Activated charcoal is produced by heating plant or mineral raw materials (e.g. coconut shells, wood or peat) in the absence of oxygen. This produces an extremely porous material with a huge internal surface area: one gram of activated carbon can have a surface area of up to 1,000 square metres!
This enormous surface area makes activated carbon a real adsorption miracle – in other words, it can bind other substances to itself like a sponge on a molecular level. And this is precisely its “trick”, as it can also bind excess toxins/poisons in our digestive tract and thus render them harmless.
How does activated charcoal work in the body?
Activated charcoal has long been used in the medical field to treat acute poisoning and diarrhoea. It binds unwanted substances in the gastrointestinal tract and ensures that they are not absorbed into the bloodstream but simply excreted again. In functional drinks such as my activated charcoal lemonade, the focus is more on wellness:
- Activated charcoal is well tolerated,
- has a gentle effect on the intestines and, according to studies, can counteract the formation of gas and cramps*,
- binds unwanted substances in our digestive tract and provides a natural balance.
Good to know:
Activated charcoal not only binds unwanted substances, but may also bind medicines, vitamins or minerals. Therefore, you should not use it permanently and not in close proximity to taking medication or food supplements. An interval of at least 2 hours is advisable.
Activated carbon as a natural water filter
The original and very practical application is also exciting: Activated carbon for water filtration.
Many modern water filters – whether as jugs, built-in filters or camping tools – rely on activated carbon to remove chlorine, pesticides, drug residues, microplastics and heavy metals from water:
- Bind chlorine, pesticides, drug residues, microplastics and heavy metals from tap water,
- improve taste and odour and
- noticeably improve water quality.
💡Tip: If you prepare your activated charcoal lemonade with filtered water, it not only tastes better, but also supports your detox claim – without any hocus pocus. I also have one at home and am very happy with it!
Activated charcoal is not a superfood in the classic sense, but it can be a clever add-on to your diet – if you use it consciously and in moderation. As a natural filter, functional ingredient or simply as a visual highlight, it definitely deserves its place in the kitchen. Nowadays, you can find activated charcoal tablets in any well-stocked chemist’s shop – also a must-have for your first-aid kit!

Equipment
- 1 mortar optional
Ingredients
- 250-300 ml water still, purified
- 1 lemon juiced
- 1 tablet activated charcoal Please only use food-safe activated charcoal!
Instructions
- Squeeze the lemon and pour into a large glass.
- Crush the activated charcoal, add and mix well.
- Top up with water – cold or lukewarm. Stir, leave to infuse briefly – enjoy!
Nutrients
Other ingredients and their potential benefits
- 1 tsp psyllium husks (promotes satiety, stabilises blood sugar, aids digestion)
- 1 tsp apple cider vinegar (aids digestion, lowers blood sugar spikes)
- 2-3 slices of fresh ginger (aids digestion, anti-inflammatory, warming)
- 1 pinch of turmeric + black pepper (antioxidant, slightly anti-inflammatory, beautiful colour)
- 1-2 sprigs of mint or lemon balm (refreshing, cooling, invigorating taste)
- 1 pinch of sea salt/electrolytes (supports mineral supply – especially in hot weather or during sport)
- Ice cubes or lukewarm water – depending on taste
💡Tip: If you use psyllium husks, drink straight away – otherwise the mixture will gel. Or deliberately leave it to stand for a few minutes if you want a satiating effect.
How often should you drink activated charcoal lemonade?
Personally, I enjoy it about 1–2 times a month, preferably on an empty stomach after I’ve been fasting for 16–18 hours. Afterwards, I always wait another 1–2 hours before having my first meal, to give the drink enough time to work in the digestive tract.
Conclusion: Activated charcoal lemon water – smart, stylish, functional
Lemon water is a tried-and-tested classic – and rightly popular. But with a few clever ingredients such as activated charcoal, psyllium husks or ginger, you can turn it into a real power drink that not only looks good, but also makes you feel good. So nothing stands in the way of your activated charcoal lemonade, does it? Feel free to let me know in the comments how you prefer to drink it or if there are any ingredients that I don’t have on my radar! I’m always happy to have a lively exchange!
Whether you drink it warm in the morning or ice cold in summer, you decide. The important thing is to listen to your body, drink enough, and enjoy it consciously.
Stay hydrated – stay vibrant – keep shining. ✨
Rosa ♥️🐿️
Quotes/ Studies:
*Freitas D, Boué F, Benallaoua M, Airinei G, Benamouzig R, Le Feunteun S. Lemon juice, but not tea, reduces the glycemic response to bread in healthy volunteers: a randomized crossover trial. Eur J Nutr. 2021 Feb;60(1):113-122. PMID: 32201919.
*Hall RG Jr, Thompson H, Strother A. Effects of orally administered activated charcoal on intestinal gas. Am J Gastroenterol. 1981 Mar;75(3):192-6. PMID: 7015846.
*Jain NK, Patel VP, Pitchumoni CS. Efficacy of activated charcoal in reducing intestinal gas: a double-blind clinical trial. Am J Gastroenterol. 1986 Jul;81(7):532-5. PMID: 3521259.

2 Comments
zorse nyt game
20. September 2025 at 9:39This article is super informative! I love how it debunks the myth about lemon water detoxing while explaining the real benefits of activated charcoal. The recipe ideas are super helpful too!
rosalazic
2. October 2025 at 12:22Thank you – great pleasure!