The answer is NO.

However what happens if I treat someone who has cancer and is unaware of it? Can the cancer’s growth be stimulated? The effects of LLLT on cancer cells in vitro have been studied, and it was observed that they could be stimulated by laser light. Experiments on rats have shown that small tumours treated with LLLT can recede and completely disappear, although laser treatment had no effect on tumours over a certain size. It is probably the local immune system, which is stimulated more than the tumour.

The situation is the same for bacteria and virus in culture. These are stimulated by laser light in certain doses, while a bacterial or viral infection is eradicated more quickly after treatment with LLLT