What is Rheumatoid Arthritis?

By 3rd September 2020 September 18th, 2020 No Comments

Find out if you are at risk of developing RA and what you can do about it

What is Rheumatoid Arthritis?

Rheumatoid arthritis (RA) is a chronic auto-immune disease where our body attacks its own joints, causing pain, inflammation and damage. The most common joints affected are the small ones in the hands and feet, but it can also affect other joints as well. The eyes, lungs and heart can also be affected by RA. It is a disease that affects 1% of the world population.

Am I at risk?

Although we don’t fully understand this disease, and why it happens. There are a few risk factors that we observe. 

Genetics are responsible for most of the risk of developing RA. Smokers are at a high risk of developing this disease, especially if they have a genetic predisposition. 

High body mass index (BMI) can increase the risk of RA as well. In women, for every 5kg/m2 of BMI increase, the risk increases by 13%. For those with an already high BMI (>30kg/m2), there is a 26% to 47% increased risk of developing RA.

How do I calculate BMI?

To calculate your BMI, divide your current weight in kilograms by your height square meters. For example, if you are 60kg and your height is 1.60m your BMI is 60/(1.60*1.60) = 23kg/m2

Those who drink a lot of sugar-sweetened sodas seem to have a higher risk of developing RA. However, breastfeeding seems to protect against RA.

Problems beyond the joints

Having RA puts you at risk of developing other health conditions. This is because of the disease itself or as side effects of the medications. Here’s a list of the co-morbidities associated with RA:

  • Cardiovascular Disease
  • Diabetes
  • Osteoporosis
  • Anaemia 

The inflammation in the body caused by the RA increases the risk of cardiovascular disease in 50 to 70%!

Support from a dietitian is crucial to help correct any nutritional deficiencies and prevent or manage these conditions and improve the disease symptoms. Dietary changes complement the medication prescribed by your doctor.

Here are some of the strategies that your dietitian will work with you on:

Help you keep a healthy weight

The most important aspect of diet management in RA is body weight. Excessive body fat can increase systemic inflammation, leading to more symptoms and prolong suffering. It can also reduce the effectiveness of the medication. Excessive body fat will also put you at risk of cardiovascular disease and diabetes. 

On the opposite spectrum, if you are losing weight unintentionally, this can be caused by the disease. Unfortunately, in this case, you are most likely losing muscle mass instead of fat and putting your health at risk.   

In both cases, the dietitian will help you to keep a healthy weight, support your lean mass through a balanced diet. 

Help you choose the right type of fats

To reduce the risk of cardiovascular disease, keeping your blood cholesterol levels low is crucial. The type of fat that you use for cooking and the foods that you eat can influence blood cholesterol, joint inflammation and pain. Read more on cholesterol here


During your consult, your dietitian may advise you to favour fish over meat and have more fatty fish. Also, fish oil may help to reduce RA symptoms. Discuss with your dietitian and doctor about it. 

Help you assess your vitamins and minerals needs

People with RA are at risk of having anaemia and osteoporosis. Diet plays an important role to prevent and manage these conditions. 

To avoid anaemia the dietitian will help to identify if you are missing specific nutrients such as iron, vitamin B12 or even folic acid. Together, you will work on strategies to incorporate these nutrients into your diet. 

Calcium and vitamin D are essential to maintain bone structure. During the consultation, the dietitian will check whether you are eating enough of these nutrients and how you can increase them, if necessary. 

Avoid foods with added sugar

Sweetened beverages and desserts are known as possible triggers of RA. If these foods are part of your routine, you might benefit from reducing or even eliminating them from your diet. You will be able to work with the dietitian on strategies to reduce sugar and replace them with healthier foods. 

Keep your intestinal bacteria healthy 

The gut microbiome plays an important role in our immune system. People with RA have altered gut microbiome. These changes seem to increase the risk of RA and influence the severity of the disease. The dietitian will help you with a diet that promotes a healthy gut, by helping you increase the amount of fibre and prebiotics that you eat.  At this stage, the use of probiotics has not been shown to be effective. 

The bottom line

A healthy diet together with medication may help alleviate your symptoms, but also help manage or prevent some other disease such as cardiovascular disease. Monitor your weight, check the type of fats that you are eating, look at foods that support your red blood cells,  bone and gut health. The dietitian is your best partner to help guide you to implement the right strategies. 


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PEN nutrition (updated 2020) Rheumatoid Arthritis Practice Guidance Toolkit. Available at pennutrition.com 

Rudbane A, Rahmdel S, Abdollahzadeh SM, Zare M, Bazrafshan A & Mazloomi SM (2018) The efficacy of probiotic supplementation in rheumatoid arthritis: a meta-analysis of randomized, controlled trials. Inflammopharmacology 26(1):67-76.

Wasserman, AM. (2011). Diagnosis and management of rheumatoid arthritis. Am Fam Physician.84(11):1245-52. 

Claudia Correia

Claudia Correia

Claudia has a degree in Dietetics and has a special interest in Women’s Health, Mediterranean Diet, Weight Management, Chronic Disease, Nutritional Wellness & Mindful Eating, as well as, in Cancer Nutrition Therapy. She is a dietitian member of SNDA (Singapore Nutrition and Dietetics Association) and member of the Academy of Nutrition and Dietetics. Claudia has been practising as a dietitian since 2010, and she has spent four years at Raffles Hospital. For the past years, she has been passionately working with her clients on areas such as weight management, women’s health, chronic disease management, wellness and oncology. Claudia has diversified experience from both Europe and Asia, coupled with the expertise of handling a variety of cuisines. She caters to the most varied needs of an individual. When consulting her clients, she educates and creates awareness of the impact of food, while emphasizing the enjoyment of food.

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