Home > Newsletters > Daily: Love or hate Earth Hour? > Daily Dose: This is why your vanilla or cinnamon flavoured e-cigarette is toxic > Health-in-Motion Updated 02 March 2016 Light therapy for depression If lack of sunlight contributes to seasonal affective disorder, then getting more light may reverse it. Bright light works by stimulating cells in the retina that connect to the hypothalamus, a part of the brain that helps control circadian rhythms. Activating the hypothalamus at a certain time every day can restore a normal circadian rhythm and thus banish seasonal symptoms. Light therapy entails sitting close to a special “light box” for 30 minutes a day, usually as soon after waking up as possible. These boxes provide 10,000 lux (“lux” is a measure of light intensity). That’s about 100 times brighter than usual indoor lighting; a bright sunny day is 50,000 lux or more. You need to have your eyes open, but don’t look at the light. 0 More: Daily Dose: This is why your vanilla or cinnamon flavoured e-cigarette is toxicHealth-in-Motion advertisement Other news Lifestyle US soldier receives world's first penis and scrotum transplant Diet and nutrition Africa needs to address multiple food issues to end hunger News Your neighbour's backyard chickens might carry salmonella risk Diet and nutrition 10 of the most extreme and dangerous weight-loss methods News ‘I feel so honoured I was able to help save his life’: Daughter donates kidney to dying father News Mysterious illness turns energetic pole dancer into a fatigued ‘gran’ From our sponsors WIN a R2 000 beauty voucher! Understanding diabetes self-management Fed up with the Phlemings? Let’s chat diabetes and erectile dysfunction Live healthier FYI » When the flu turns deadly Why the flu makes you feel so miserable Could a deadly flu strain hit SA this winter? Following an intense flu season in the US and UK, should we be worried about our own upcoming flu season? Alcohol and acne » Dagga vs alcohol: Which is worse? SEE: Why you are drinking more alcohol than you realise Does alcohol cause acne? Some foods can be a trigger for acne, but what about alcohol? Dermatologist Dr Nerissa Moodley weighs in.