Glucosamine can cause some mild side effects including bloating, nausea, diarrhea, and constipation. When applied to the skin: N-acetyl glucosamine is possibly safe when used for up to 10 weeks.

Why you shouldn’t take glucosamine?

Glucosamine may affect blood sugar and insulin levels. However, studies are mixed. Talk to your doctor before taking this supplement if you have diabetes or insulin resistance. Animal studies show that glucosamine may further increase LDL "bad" cholesterol levels if you eat a lot of fatty foods.

Who should not take glucosamine?

Glucosamine may also increase glaucoma risk. Therefore, it shouldn't be taken by those at risk of developing glaucoma, including those with a family history of glaucoma, people ages 60 or older, and those who have diabetes, heart disease, or high blood pressure ( 31 ).

Can glucosamine make joints worse?

The study was stopped early for an unusual reason — those taking the supplement actually reported worse symptoms than those taking a placebo. This raises the possibility that taking glucosamine and chondroitin might make your joints feel worse than doing nothing.

Are there any side effects from glucosamine and chondroitin?

The most commonly reported side effects of glucosamine and chondroitin include: Nausea. Diarrhea or constipation. Heartburn.

Is glucosamine worth taking?

Generally safe Glucosamine sulfate might provide some pain relief for people with osteoarthritis. The supplement appears to be safe and might be a helpful option for people who can't take nonsteroidal anti-inflammatory drugs (NSAIDs). While study results are mixed, glucosamine sulfate might be worth a try.

Can glucosamine cause liver damage?

Hepatotoxicity. In controlled trials, glucosamine and its combination with chondroitin have not been linked to serum enzyme elevations or to instances of clinically apparent liver injury. In addition, cases of clinically apparent liver injury have not been reported from prospective trials.

How safe is glucosamine?

Glucosamine hydrochloride is possibly safe for most adults when used for up to 2 years. N-acetyl glucosamine is also possibly safe when used for up to 6 months. Glucosamine can cause some mild side effects including bloating, nausea, diarrhea, and constipation.