Background: Nickel is contained in everyday objects, and it is one of the leading causes of allergic contact dermatitis. Positive patch tests to nickel suggest possibility of dermatitis from nickel-plated item usage and nickelcontaining- food ingestion. Objectives: This was a retrospective study to assess efficacy of nickel restricted diets in nickel sensitized patients and to evaluate their adherence to nickel restricted diet. Methods: A review of the records of nickel sensitized patients from June 1st 2018 to April 30th 2020 with positive patch tests to nickel was conducted. Patients were phone interviewed in May 2020 to assess current status of their dermatitis, frequency of flare-up, and self-reported adherence to the diet. Results: Of 245 patients, only 100 patients were able to be contacted. Patients with localized skin lesion (n=44) and with generalized skin lesion (n=56) did not show difference in nickel sensitivity. The extent of involved skin lesion and nickel sensitivity did not predict compliance. 24 of 29 (82.7%) patients with good compliance reported improvement; only 32 of 71 (45.1%) patients with poor compliance reported improvement. The percentage of improved patients with good compliance and that of the group with poor compliance showed statistically significant difference (p<0.05). Conclusion: To improve patient compliance, a simplified and interventional guidelines for nickel restricted diet should be implemented along with dermatologists’ encouragement and reassurance.