There are several types of zinc supplements.
Their professional medical team is able to collect your sample in Kuala Lumpur, Selangor, Melaka, Penang only Georgetown, Butterworth, Bukit Mertajam, Balik Pulau, Bayan Lepas, Jelutong and Seberang Perai , Johor only Johor Bahru and Skudai , Perak only Ipoh and Tanjung Malim , Kedah only Alor Setar, Kulim, Lunas and Sungai Petani , Sarawak only Kuching and Negeri Sembilan only Seremban and Nilai.
In this case, please retest with a new test kit strictly following the instruction.
Two methods are provided by the kit, so you can either do a swab or saliva test.