1. replenish the spleen and kidney: lotus heart is rich in protein, amino acids, calcium, iron, vitamin B and other nutrients, which can replenish the body's energy and nutrients needed to enhance the function of the spleen and kidney.

2. Relieve anxiety and insomnia: Lotus heart is rich in alkaloids and aromatic substances, which can regulate the function of the nervous system and relieve anxiety and insomnia.

3. Lowering blood pressure: Lotus heart has an effect similar to ACE inhibitors, which can inhibit the synthesis of angiotensin and lower blood pressure.

The contraindications of drinking lotus heart in water:

1. Children: lotus heart is rich in a variety of alkaloids and aromatic substances, which is not suitable for children to consume, and is likely to lead to gastrointestinal discomfort.

2. Liver and kidney dysfunction: lotus seed heart contains some toxins, liver and kidney dysfunction should not be consumed.

3. Spleen deficiency heavy wet: lotus seed heart is rich in starch and protein, easy to lead to spleen and stomach dysfunction, should not be eaten.

4. Herbal allergy: lotus heart belongs to Chinese medicine, some people are allergic to herbs should not be eaten.