Jessie-May Gattiker, 23, was 19 when she was diagnosed with rheumatoid arthritis.
She developed searing hot pain in her legs, arms, hands and neck, which would come and go sporadically.
Over the course of 10 months, the pain was “ripping through her hands, legs and arms like a fire on a daily basis”, she said.
She had to give up her dream of being a famous hairdresser because she wasn’t well enough. The thought of giving up her job broke her heart, she added.
“I think I was in a state of shock for about a year after the diagnosis and went through a sort of grieving process,” Gattiker told Express.co.uk.
“It was so severe that sometimes I couldn’t walk or get out of bed by myself. I had no idea what was going on at this point and I was really scared.”
Rheumatoid arthritis is an auto-immune disease, where the body’s immune system attacks the cells that line joints by mistake.
The condition makes joints swollen, stiff and painful, and can also lead to a lack of energy, a fever and a poor appetite, according to the NHS.
“The good thing about having arthritis is that it’s made me think about what I eat and how it can affect my health,” said Gattiker.
“A client told me about the What IF Plan, a new diet with scientifically proven health benefits, so I thought I had to give it a try.”
The plan uses a DNA test to find how each particular body reacts to certain foods.
Following a personalised plan could help with weight loss, and can help to reduce the symptoms of rheumatoid arthritis, it was claimed.
Gattiker discovered her joints were more prone to inflammation, so the plan advised her to take omega-3 supplements.
Within a week, she didn’t feel as stiff when she woke up in the mornings, she said.
Gattiker began her personalised diet plan, and was amazed at how quickly she saw a difference, she said.
Following the What IF Plan also helped her mild acne symptoms.
“A month into the diet and my eyes were sparkling, I was full of energy and feeling more confident to face the day.
“I still suffer from pain of course, but the What IF Plan has made a huge difference to my physical strength and mental health.”
Inflammation can be addressed by what people eat, according to experts. Sugar and saturated fats can dramatically affect arthritis.
Cutting out vegetable oil could reduce symptoms, it was claimed, as too much omega-6 can trigger inflammation.
What is the What IF Plan?
The diet uses DNA from a quick saliva swab, which can be done at home, and then posted to a lab.
It claims to be the world’s first weight management programme that uses intermittent fasting – for weight loss – and a personalised nutrition plan, based on an individual’s DNA.
Unlocking your individual DNA is the key to understanding how your body processes certain foods, according to the What IF Plan.
It’s available to buy online for £299.