Below are 10 science news that I found interesting and are related to topics I care about.

Depression linked to reduced arginine levels – People suffering from major depressive disorder, MDD, have reduced arginine levels, a new study from the University of Eastern Finland shows. Arginine is an amino acid which the body uses to produce, e.g., nitric oxide. Nitric oxide, in turn, is a nervous system and immune defence mediator, and it also plays a role in vascular regulation. The global arginine bioavailability ratio, GABR, is an indicator of the body’s arginine levels, and the ratio has previously been used to measure the body’s capacity to produce nitric oxide. Reduced arginine bioavailability is also known to be an independent risk factor of cardiovascular diseases. Science Daily

New stem-cell based stroke treatment repairs damaged brain tissue – A team of researchers at the University of Georgia’s Regenerative Bioscience Center and ArunA Biomedical, a UGA startup company, have developed a new treatment for stroke that reduces brain damage and accelerates the brain’s natural healing tendencies in animal models. They published their findings in the journal Translational Stroke Research. Science Daily

First vaccine in the world developed against grass pollen allergy – Around 400 million people world-wide suffer in some form or other from a grass pollen allergy (rhinitis) — with the usual symptoms such as a runny nose, cough and severe breathing problems. In collaboration with the Viennese firm Biomay AG, MedUni Vienna researchers at the Institute of Pathophysiology and Allergy Research have now shown in a Phase II-b study with 180 patients in 11 European centres, that four injections of the synthetically manufactured vaccine BM32 in the first year and a top-up in the second year of treatment relieve the sufferers’ symptoms by at least 25%. Science Daily

We Might Finally Know Why The Blood of Young People Can Rejuvenate Old Brains – Scientists have been rejuvenating old mice with infusions of not just the blood of younger mice, but even blood from teenage human beings – and we finally have our first clues on why this strange technique works. Science Alert

Here’s Why Matching Your Diet to Your DNA Is a Waste of Time – Diets have always gone through fads. The grapefruit diet, Atkins, paleo, Whole30 – like a many-headed weight-loss hydra, just as soon as one falls out of favor, another rises in its place. Science Alert

Scientists Just Discovered a Never-Before-Seen Structure in Human Sperm – The sperm’s tail is perhaps one of the most iconic structures among all of the cells in the human body, so it’s odd to think there are still some things we don’t know about it. Science Alert

Household products make surprisingly large contributions to air pollution – In urban areas, emissions from consumer goods such as paint, cleaning supplies and personal care products now contribute as much to ozone and fine particulate matter in the atmosphere as do emissions from burning gasoline or diesel fuel. Science News

Babies can recover language skills after a left-side stroke – A stroke on the left side of the brain often damages important language-processing areas. But people who have this stroke just before or after birth recover their language abilities in the mirror image spot on the right side, a study of teens and young adults shows. Those patients all had normal language skills, even though as much as half of their brain had withered away, researchers reported February 17 at the annual meeting of the American Association for the Advancement of Science. Science News

GM Crops Found To Increase Yields And Reduce Harmful Toxins In 21 Years Of Data – A study looking at 21 years of data on genetically modified crops (GMOs) in the US has found that not only can they increase crop yields, but they can also be good for you. IFLScience

Heavy Drinking Is The Biggest Avoidable Risk Factor In The Onset Of Dementia – An analysis of more than a million dementia patients has found that chronic heavy drinking puts you at serious risk of developing Alzheimer’s disease. In fact, alcohol use disorders were found to be the biggest avoidable risk factor in the onset of dementia. IFLScience