When considering complementary treatments, supplements or dietary changes, be open-minded yet skeptical. Learn about the potential benefits and risks. It is especially important to evaluate critically any claims made by the producers and/or sellers of supplements, natural products and other alternative medicines.

A reliable resource that I really like is the About Herbs database that Memorial Sloan Kettering Cancer Center maintains.
– About Herbs (Oncology) https://www.mskcc.org/cancer-care/diagnosis-treatment/symptom-management/integrative-medicine/herbs

It is a useful tool for the public as well as healthcare professionals that can help you figure out the value of using common herbs and other dietary supplements.

Here's the MSKCC's information about lycium, commonly known as goji berries.
- Lycium: Purported Benefits, Side Effects & More https://www.mskcc.org/cancer-care/integrative-medicine/herbs/lycium

Excerpt:
"The safety and efficacy of lycium for chronic diseases has not been established.

Lycium berries, commonly referred to as goji berries, are used in traditional medicine to treat inflammation, skin irritation, nose bleeds, aches, and pains. Lycium is also used as a sedative. In Chinese medicine, it is commonly used with other botanicals for poor vision, anemia, and cough. As Goji berries, they are marketed as a superfood that are high in antioxidants.

Lab studies have identified polysaccharides from the plant that may improve immune response and effects of radiation therapy. Other experiments suggest Lycium may inhibit the growth of some cancer cells.

In humans, a few small studies suggest potential benefits in helping to lower cholesterol or blood sugar. However, data are limited and it has not been studied for cancer prevention or treatment. Well-designed clinical trials are needed to determine any benefits Lycium may have against chronic diseases."