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Do you know the relationship between vitamin D and calcium?

Table of Contents
What is the definition of vitamin D?
What is the main function of vitamin D?
What are the consequences of vitamin D deficiency?
What are the consequences of too much vitamin D?
What is the relationship between vitamin D and calcium?
Which foods are high in vitamin D?
Which foods are relatively high in calcium content?

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L-Theanine

L-Theanine: A natural anti-stress and cognitive enhancer

Table of Contents
Introduction
1. What is L-Theanine?
2. Mechanism of action of L-theanine
3. Health benefits of L-theanine
4. Market application of L-theanine
5. How to choose high-quality L-theanine?
6. Recommended dosage and safety
7. Why choose our L-theanine?