Original zhuli curiosity
It’s time to go out with my family again.
After two hours of spinning and jumping,
Mouth and tongue protested first.
So you walk into a supermarket at random,
I am going to buy a bottle of water to quench my thirst.
As a result,
The shelves are full of rows of bottled water.
Let you see it,
Why are there so many kinds of water now?
Pure water, natural water, mineral water
……
What kind of drink should I buy?
01
Common drinking water on the market
What kind of water is it?
The bottled drinking water we usually see in the supermarket is probably the following:
Brand name
Product chart
type
Nongfu Spring
Natural water
Glacier
Natural water
Chunshuile
purified water
Ganten
mineral water
Yibao
purified water
Master Kong
purified water
Or other types of drinking water *
Evian
mineral water
Mt. Kunlun
mineral water
Nongfu Spring
(Long Snow)
mineral water
* This Master Kong drinking water is only marked with "packaged drinking water" on the surface of the product, but because its implementation standard is GB19298 (this standard is only applicable to packaged drinking water except mineral water), it is judged to be pure water or other kinds of drinking water.
On the far right of the table are the types of these drinking water. Natural water, mineral water and purified water all belong to packaged drinking water, among which purified water and mineral water are different in water source and composition:
name
waterhead
ingredient
purified water
earth’s surface
underground
Public water supply system
It contains almost no minerals and trace elements.
mineral water
Spontaneous emission from the ground
Collected by drilling
Contains a certain amount of minerals and trace elements.
To put it simply, the difference between pure water and mineral water is that there are no minerals in one water and minerals in the other; A water source may be underground, surface and public water supply system, while a new water source is only underground.
After talking about pure water and mineral water, let’s look at natural water.
In the National Standard for Food Safety Packaging Drinking Water (GB19298-2014), there is no relevant regulation on natural water.
Moreover, Nongfu Spring, a common red bottled drinking water, implements their own enterprise standard Q/NFS 0001S.
Then what is stipulated in this standard?
Specific Provisions on "Drinking Natural Water" in Nongfu Spring Enterprise Standard | Q/NFS 0001S-2018
From the above passage, we can extract two important messages:
(1) Nongfu Spring is definitely not mineral water. Because Nongfu Spring belongs to the "natural drinking water" in the implementation standard GB19298-2014, and this implementation standard does not apply to drinking mineral water.
Reference 1
(2) The water sources of Nongfu Spring are surface water and groundwater, excluding the public water supply system, and the mineral content in the water will be more than that of pure water.
Contents of Elements in Bottled Water of Nongfu Spring
02
What kind of bottled water do you recommend daily?
From the perspective of mineral content, it is mineral water > natural water > pure water.
But is it necessary for us to buy mineral water to replenish our bodies?
The answer is not necessary. The main purpose of drinking water is to replenish water and minerals, which is a side effect.
We really need all kinds of minerals (such as calcium, phosphorus, potassium, sodium, magnesium, etc.) to maintain the normal operation of the body. Take "calcium" as an example. According to the Dietary Guide for China Residents (2022) (hereinafter referred to as the Guide), the recommended daily intake of calcium for an adult is 800 mg.
Reference 4
If we calculate according to the maximum value, then in a bottle of 500 ml Evian mineral water, the content of sodium is 5 mg, potassium is 0.8 mg, calcium is 45 mg, magnesium is 15 mg, and strontium (S Ο) is 0.265 mg.
A bottle of 200ml milk contains about 200 mg of calcium. In contrast, the mineral we supplement by drinking mineral water is very small, and it can’t reach the recommended intake in the Guide at all.
Therefore, we don’t have to buy mineral water specially to supplement minerals.
As long as you eat properly in your daily life, you can supplement enough minerals. If you feel thirsty when playing outside, just buy a bottle of drinking water you like at random.
03
Drinking alkaline water is healthier?
When you usually visit the supermarket, I don’t know if you have noticed it. This kind of water is often placed on the shelf bar. They print the words "weakly alkaline" on the bottle as a prominent logo as a selling point.
So, is it really healthier to drink weakly alkaline water?
There are two kinds of alkaline water, one is natural and the other is artificial. Artificial alkaline water increases the alkalinity of water by recycling acidic components.
The marketing of alkaline water is mainly based on "acid ash hypothesis". This hypothesis claims that after eating too much meat, eggs and dairy products, we will produce a substance called "acid ash", which will increase the acid level in our body and lead to adverse effects such as osteoporosis.
Interestingly, Robert O Young, who advocated the acid ash hypothesis and alkaline diet, was sentenced to three years’ imprisonment in 2017 for practicing medicine without a license.
Our body has its own set of operating mechanism. Generally speaking, the normal pH value of the body will be kept in the range of 7.35 ~ 7.45. Only in this case can all the enzymes in our body play their respective roles to the maximum extent.
Therefore, there is no need to blindly buy alkaline water for the so-called acid-base balance theory. For people with sensitive stomach and intestines, drinking too much alkaline water may also lead to bloating and spasm.
References:
1. National Food Safety Standard Packaging Drinking Water (GB19298-2014)
2. National Food Safety Standard for Drinking Natural Mineral Water (GB 8537-2018)
3. Enterprise Standard of Nongfu Spring Co., Ltd. (Q/NFS 0001S-2018)
4. China Nutrition Society. Dietary Guidelines for China Residents (2022). Beijing: People’s Health Publishing House, 2022.
Original title: "Nongfu Spring is not mineral water? What’s the difference between pure water, natural water and mineral water? 》
Read the original text
关于作者