Alkaline Minerals – Effects, Sources and Deficiency
Alkaline minerals are minerals that support the body´s acid-base balance. They help neutralize excess acids and promote overall physiological equilibrium.
Things worth knowing about "Alkaline Minerals"
Alkaline minerals are minerals that support the body´s acid-base balance. They help neutralize excess acids and promote overall physiological equilibrium.
What Are Alkaline Minerals?
Alkaline minerals are a group of essential minerals that exert a base-forming effect in the body, thereby contributing to the regulation of the acid-base balance. The most important alkaline minerals include calcium, magnesium, potassium, sodium, and zinc. They are found naturally in plant-based foods, mineral waters, and dietary supplements.
Function and Mechanism of Action
The human body regulates its pH very precisely. In healthy individuals, blood pH ranges between 7.35 and 7.45 – slightly alkaline. Alkaline minerals support this balance by acting as buffer systems: they bind excess hydrogen ions (acids) and help the body neutralize or excrete them.
- Calcium: Essential for bones, muscles, and nerve function; buffers acids in the blood.
- Magnesium: Involved in more than 300 enzymatic reactions; supports muscle and nerve relaxation.
- Potassium: Regulates electrolyte balance and supports kidney function in acid excretion.
- Sodium: Essential for fluid balance and cellular function.
- Zinc: Supports immune function and numerous metabolic processes.
Acid-Base Balance and Diet
A diet rich in animal products, sugar, and processed foods can place a burden on the body´s capacity to excrete acids. Alkaline minerals, found predominantly in vegetables, fruits, legumes, and nuts, can help counteract this imbalance. In addition, alkaline minerals are often used in the form of dietary supplements – such as alkaline powders or tablets – to support acid-base balance.
Dietary Sources
Alkaline minerals are found primarily in plant-based foods:
- Green leafy vegetables (e.g., spinach, Swiss chard) – rich in magnesium and calcium
- Potatoes and sweet potatoes – excellent potassium sources
- Almonds and nuts – provide calcium and magnesium
- Legumes (e.g., lentils, chickpeas) – contain potassium and magnesium
- Bananas and figs – potassium-rich with an alkaline-forming effect
- Highly mineralized water – supplies calcium and magnesium
Recommended Daily Intake
The German Nutrition Society (DGE) recommends the following daily amounts for adults:
- Calcium: 1000 mg/day
- Magnesium: 300–350 mg/day (depending on sex)
- Potassium: 4000 mg/day
- Zinc: 7–10 mg/day (depending on sex)
With a balanced, plant-rich diet, the need for alkaline minerals is generally met through food alone. However, supplementation may be beneficial in certain situations, such as increased demand, impaired absorption, or confirmed deficiency.
Deficiency Symptoms
A lack of alkaline minerals can cause a range of complaints:
- Calcium deficiency: Cramps, brittle bones, increased risk of osteoporosis
- Magnesium deficiency: Muscle cramps, sleep disturbances, fatigue, cardiac arrhythmias
- Potassium deficiency: Muscle weakness, fatigue, irregular heartbeat
- Zinc deficiency: Impaired wound healing, weakened immune system, hair loss
Safety and Interactions
Alkaline minerals are considered safe when taken orally in recommended amounts. However, excessive intake – particularly through supplements – may cause adverse effects such as diarrhea (magnesium), kidney stones (calcium), or nausea. Alkaline minerals can also interfere with the absorption of certain medications, including antibiotics (tetracyclines, fluoroquinolones) and thyroid hormones. Individuals taking regular medication should consult a doctor or pharmacist before using mineral supplements.
References
- Deutsche Gesellschaft für Ernährung (DGE): Reference Values for Nutrient Intake. Bonn, 2021. Available at: https://www.dge.de
- World Health Organization (WHO): Diet, Nutrition and the Prevention of Chronic Diseases. WHO Technical Report Series 916. Geneva, 2003.
- Remer T, Manz F: Potential renal acid load of foods and its influence on urine pH. Journal of the American Dietetic Association, 1995; 95(7):791-797.
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