HONG KONG (AP) - By day, the small commercial kitchen in a Hong Kong industrial building produces snacks. At night, it turns into a secret laboratory assembling a kit for pro-democracy protesters seeking to detox after repeated exposure to tear gas.

Volunteers seated around a kitchen island sort and pack multi-coloured pills into small resealable bags. At another table, a woman makes turmeric pills by dipping gelatin capsules into a shallow dish of the deep orange spice.

"Police have used so much tear gas and people are suffering," said the owner of the kitchen, speaking on condition of anonymity because she fears repercussions for her business.