A “no diet” diet is launched today which could allow millions of people to continue with the festive chocolate and still lose weight.

Body ID Plan.com replaces the stream of “one size fits all” fad diets with a personalised, long-term healthy eating plan.

Using laboratory testing, Body ID Plan.com recognises that many slimmers react to certain foods that can lead to internal bloating, fluid retention, and inflammation, as well as tiredness, migraines and digestive disorders.

It solves this problem through the UK’s first home kit of its kind, allowing a simple pinprick of blood to be taken from a finger for analysis at a state-of-the-art laboratory.

The blood is tested for immune reactions to 76 foods and combined with a healthy eating plan, creates a totally personal step by step guide to cutting out individual problem foods, and achieving natural weight loss.

Among the foods tested are traditionally “healthy” foods including apple, banana, cucumber and carrot, alongside more common enemies of the diet like chocolate, and foods containing dairy, yeast and wheat.

Personalised results indicate whether to “avoid”, “enjoy in moderation” or “go ahead” for each food.

The plan costs £130, and if no reactions are found, £80 is refunded.