A specialist cancer dietitian has revealed five common errors people frequently make following a cancer diagnosis.

Nicole Andrews, a registered dietitian who focuses on cancer patients, helps them regain control through informed food and nutrition choices. Her interest in nutrition began when she discovered the prevalence of misleading cancer nutrition advice that many patients fall victim to.

Known as The Oncology Dietitian on social media, Nicole has amassed over 366,000 followers on Instagram, where she shares evidence-based tips on how food can aid cancer survivors in feeling better by adopting a new perspective on nutrition.

In a post shared in April, Nicole outlined the five most common mistakes people make after being diagnosed with cancer, offering alternative approaches to focus on instead.

She captioned her post: “The five biggest mistakes cancer survivors make after diagnosis”, before delving into her list.

1. Overwhelming yourself with too much advice

“After a diagnosis, everyone suddenly becomes an expert – your neighbour, your aunt’s friend, or someone on TikTok,” she noted.

Nicole continued: “Survivors are often overloaded with conflicting advice that leads to confusion, fear, and decision paralysis. Not every opinion deserves your energy, especially when it isn’t rooted in real, evidence-based guidance.”

2. Eliminating carbs when your brain and body needs them

Discussing the topic of nutrition and diet, Nicole pointed out that a critical error made by individuals with cancer is eliminating carbohydrates from their diets.

She clarified: “Carbs are often demonised in cancer spaces, but here’s the truth; your body needs them to heal, function, and fight fatigue.”

Carbohydrates are one of the three primary nutrients found in foods and beverages, alongside proteins and fats. The body converts carbs into glucose—a crucial source of energy for your body’s cells, tissues, and organs.

Nicole explained: “Survivors who fear carbs can end up undernourished, foggy, and exhausted – all while believing they’re doing the ‘right’ thing. This kind of restriction creates more harm than good.”

3. Relying on supplements instead of prioritising food

“Supplements can feel like the easy fix – take this, and you’ll be safe. But more isn’t always better,” remarked Nicole. “Over-supplementation can lead to imbalances, wasted money, and even interfere with medications or treatments.

“Whole foods have a synergy that no pill can replicate – but that’s often overlooked in the rush to ‘boost immunity’.”

According to NHS advice, it’s important to consult with a doctor or dietitian before incorporating a supplement into your diet, as they could affect ongoing medication or may not even be necessary.

4. Excessive rest

“Yes, rest is essential during treatment – but prolonged rest after treatment can make fatigue worse,” stated Nicole.

She explained: “Survivors are often told to ‘take it easy,’ but movement (done right) is one of the most powerful tools for rebuilding strength, improving mood, and getting energy back. The key is knowing how to do it safely and sustainably.”

Cancer Research UK confirms that it’s safe to be active both during and after cancer treatment. They also recommend that cancer patients strive to resume their normal activities as soon as they can.

Physical activity and exercise have been associated with improved quality of life and may even help prevent certain types of cancers.

5. Investing in costly gadgets that don’t deliver

For her final point, Nicole cautioned against splurging on expensive gadgets, filters, or other wellness tools, as they often fail to live up to their claims.

Nicole said: “From high-end juicers to ‘healing’ water filters to detox machines – survivors are constantly sold the idea that these tools will keep cancer away. These purchases come from a place of fear and the desire for control, but they often lead to unnecessary financial and emotional stress, without improving health outcomes.”

In conclusion, Nicole encouraged cancer survivors to concentrate on proven methods that enhance wellbeing, so they can live their best life without wasting energy on things that don’t work.