Home > Newsletters > Daily: Love or hate Earth Hour? > Daily Dose: Don't believe these asthma myths > Health-in-Motion 11 October 2016 Poison ivy If you’ve ever had a brush with leaves of the poison ivy or similar plants, you know just how painful the resulting itchy rash can be. American scientists have recently discovered that an immune molecule called CD1a causes this skin irritation after contact with urushiol, the 'active ingredient' found in such plants. Let’s hope that their finding brings us a little bit closer to formulating effective medications able to counter these inflammations. It may eventually even shed some light on psoriasis and other serious skin conditions. 0 More in Newsletters Your dog probably understands more than you might think More: Daily Dose: Don't believe these asthma mythsHealth-in-Motion advertisement Other news Sex US STIs hit all-time high in 2015 Medical Human right-handedness might go back almost 2 million years Mental health Troubled childhood may boost bipolar risk Diet and nutrition Our genes may soon advise our food and lifestyle choices Lifestyle Which skin products are better, ‘medical grade’ or ‘over-the-counter’? Medical Don't believe these asthma myths From our sponsors Keep an eye on your vision Which skin products are better, ‘medical grade’ or ‘over-the-counter’? Win 1 of 6 R5000 cash prizes Win Skin Renewal voucher Live healthier Exercise benefits for seniors » Working out in the concrete jungle Even a little exercise may help prevent dementia Here’s an unexpected way to boost your memory: running Seniors who exercise recover more quickly from injury or illness When sedentary older adults got into an exercise routine, it curbed their risk of suffering a disabling injury or illness and helped them recover if anything did happen to them. No relief for MS » Drug shows promise against MS in mouse study Vitamin D may slow multiple sclerosis Obesity in girls tied to higher MS risk Exercise may not lower women's risk of MS A Harvard study showed no evidence to support the idea that exercise lowers the risk of multiple sclerosis.