Since the water is rich in some beneficial substances, minerals would be an apt term.

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Note added at 5 mins (2017-06-03 12:03:05 GMT)
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One under-appreciated mineral is sulfate, and there is lots of sulfate in San Pellegrino compared to most other mineral waters.
https://blog.bulletproof.com/mineral-water-benefits-pellegri...
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Mineral water is water from a mineral spring that contains various minerals, such as salts and sulfur compounds. Mineral water may be effervescent or "sparkling" due to contained gases.
https://en.wikipedia.org/wiki/Mineral_water
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Many of the mineral waters available have therapeutic effects that can ease or cure multiple chronic diseases and conditions.
http://www.newhealthguide.org/Benefits-Of-Mineral-Water.html

coastal waters rich in micronutrients and basin water replete in ...

Deep-sea water (DSW), which is rich in micronutrients and minerals and with antioxidant and anti-inflammatory qualities, may be developed as ...

diverse and as rich in micronutrients as possible.

seeps into nearby natural water supplies and ground water. ... It is rich in micronutrients like magnesium, iron, molybdenum, boron, copper, zinc, and also some ...

Choose raw materials rich in micronutrients and bioactive compounds. Store raw ...

https://www.google.ru/#newwindow=1&tbs=li:1&q=water "rich in...


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Note added at 2 час (2017-06-03 14:13:48 GMT)
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What Are Micronutrients?

Vitamins and minerals are the two types of micronutrients. While only needed in small amounts, they play important roles in human development and well-being, including the regulation of metabolism, heartbeat, cellular pH, and bone density. Lack of micronutrients can lead to stunted growth in children and increased risk for various diseases in adulthood. Without proper consumption of micronutrients, humans can suffer from diseases such as rickets (lack of vitamin D), scurvy (lack of vitamin C), and osteoporosis (lack of calcium).

Minerals are also available in two forms: macrominerals and microminerals.

Macrominerals are needed in larger amounts and include the following:

Calcium
Magnesium
Phosphorus
Sodium
Potassium

Microminerals are only needed in trace amounts and include the following:

Iron
Copper
Iodine
Zinc
Fluoride
http://study.com/academy/lesson/what-are-micronutrients-defi...

Elements necessary for the correct functioning of the body are classified as macro- or microelements. The levels of macroelements in bodily fluids and tissues exceed 1 μg/g of wet tissue (μg – one millionth part of a gram – 10-6 g)Feb 24, 2012