Goji Berries for Eye Health: Benefits and Precautions for Diabetics

Goji berry issues?

Hello Dr.
Lin: My father has diabetic retinopathy and cataracts, and he is currently receiving treatment from an ophthalmologist.
I have heard that goji berries are very good for the eyes, and I would like to give them to him.
However, I have the following questions:
1.
I have purchased goji berries from several brands on the market, but when I steep them in hot water, they taste strange and seem to have some added chemicals.
Which brand of goji berries is better and does not contain harmful additives? Should I wash the goji berries with water before steeping them?
2.
Goji berries are known to lower blood sugar levels.
My father is taking Western medications to lower his blood sugar and cholesterol.
Should he be cautious about consuming too many goji berries to avoid excessively lowering his blood sugar?
Thank you.

tom, 40~49 year old female. Ask Date: 2012/11/27

Dr. Lin Qingzhong reply Traditional Chinese Medicine

Dear Tom/40/0 online user,
1.
I apologize for the delayed response as I just received the notification the day before yesterday.
2.
According to the records in the Compendium of Materia Medica, the functions of goji berries include: moisturizing the lungs, clearing the liver, nourishing the kidneys, boosting energy, generating essence, improving vision, benefiting the small and large intestines, and strengthening muscles and bones.
They are used to treat thirst, dry throat, fatigue, and can serve as a tea substitute to quench thirst.
3.
Your father has diabetic retinopathy and cataracts, and he is currently receiving treatment from an ophthalmologist.
Goji berries are beneficial for the eyes, so you can buy them for him.
However, when steeped in hot water, they may have an unusual taste, possibly due to the addition of some chemical components, as most goji berries come from mainland China.
Currently, Taiwan is strengthening its regulatory controls, so it is advisable to wash the goji berries before steeping them.
Taiwan also produces goji berries, but the yield is low, so there should be no issues with them.
4.
Your father should continue taking his prescribed medications for lowering blood sugar and cholesterol.
Goji berries can lower blood sugar levels, so if you are concerned that he might consume too many and lower his blood sugar excessively, it is recommended to purchase a blood glucose monitor to regularly check his levels and adjust the amount of goji berries accordingly.
However, it is suggested that finding a qualified traditional Chinese medicine practitioner for diagnosis and treatment would yield better results.
Wishing you well,
Dr.
Lin Qingzhong
Director, Department of Traditional Chinese Medicine, Fengyuan Hospital
Associate Professor, Department of Nursing, Hungkuang University

Reply Date: 2012/11/27

More Info

Goji berries, also known as wolfberries, have gained popularity for their potential health benefits, particularly in relation to eye health. However, for individuals with diabetes, especially those experiencing complications such as diabetic retinopathy and cataracts, it is essential to approach the consumption of goji berries with caution and informed understanding.

Benefits of Goji Berries for Eye Health
1. Rich in Antioxidants: Goji berries are high in antioxidants, particularly zeaxanthin and lutein, which are known to protect the eyes from oxidative stress. These compounds can help filter harmful blue light and may reduce the risk of age-related macular degeneration (AMD) and other eye diseases.

2. Anti-Inflammatory Properties: The anti-inflammatory properties of goji berries can be beneficial for overall eye health. Chronic inflammation is a contributing factor to various eye conditions, including diabetic retinopathy.

3. Nutrient Dense: Goji berries are rich in vitamins A and C, both of which are essential for maintaining good vision and overall eye health. Vitamin A is crucial for the maintenance of the retina and can help prevent night blindness.

Precautions for Diabetics
1. Blood Sugar Levels: While goji berries may have a mild hypoglycemic effect, it is crucial for diabetics to monitor their blood sugar levels closely when introducing any new food into their diet, especially those that may affect glucose levels. Since your father is already on medication for blood sugar control, it is advisable to consult with his healthcare provider before adding goji berries to his diet. This is to ensure that the combination of goji berries and his current medications does not lead to excessively low blood sugar levels.

2. Quality of Goji Berries: When purchasing goji berries, it is essential to choose high-quality products that do not contain added sugars, preservatives, or artificial ingredients. Look for organic options or those labeled as free from additives. Washing the berries before consumption is a good practice to remove any potential contaminants or residues from processing.

3. Moderation is Key: Even though goji berries are nutritious, they should be consumed in moderation. A small handful (about 1-2 tablespoons) is generally considered a reasonable serving size. Overconsumption could lead to unexpected fluctuations in blood sugar levels.

4. Consultation with Healthcare Providers: Given your father's existing health conditions, it is vital to discuss any dietary changes with his healthcare team. They can provide personalized advice based on his overall health status, current medications, and specific dietary needs.

Conclusion
In summary, goji berries can offer potential benefits for eye health due to their antioxidant properties and nutrient content. However, for individuals with diabetes, particularly those with complications such as diabetic retinopathy and cataracts, it is essential to approach their consumption with caution. Always prioritize quality when selecting goji berries, and consult with healthcare professionals to ensure that they fit safely into your father's dietary regimen. Regular eye check-ups and maintaining good blood sugar control remain crucial components of managing diabetes and its associated complications.

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