Issue #77 (March 2021)

• Mini: Takeaways from the ISSN's position on caffeine and exercise performance
  We break down some key takeaways from the International Society for Sports Nutrition's newly-updated position stance on caffeine's use in exercise performance.
• D-creasing asthma symptoms with supplementation
  Calcifediol is the form of vitamin D that's often checked in the blood to monitor vitamin D levels. This trial found that supplementing this form of vitamin D can improve asthma symptoms in people with vitamin D insufficiency.
• Deep Dive: Micronutrients with micro-effects for preventing and treating acute respiratory infections
  This meta-analysis found evidence that supplementing vitamins C and D may prevent the risk of acute respiratory infections, but only by a tiny amount. Zinc has a more sizable effect, but only once symptoms have set in.
• The effects of full fasting vs. modified fasting on cognitive performance
  How does full fasting impact mental functioning compared to very low-calorie intake over the course of a day? This study aimed to find out.
• Nulls: November–December 2020
  Highlights include omega-3's lack of impact on bipolar disorder, whether adding vitamin C to iron helps iron deficiency anemia outcomes, and more!
• Battling exercise-induced muscle damage with omega-3s
  This small study provides preliminary evidence that a high-dose mix of EPA and DHA may combat early post-exercise muscle soreness.
• Deeper Dive: Shining a light on the effects of vitamin D on fall risk in older adults
  This study suggests that higher vitamin D dosing doesn't prevent falls compared to lower dosing. Instead, it may cause more.
• Deeper Dive: Do I have to choose between osteoporosis and heart disease?
  A recent meta-analysis suggests that calcium supplementation leads to a small but significant increased risk of heart disease. In this review, we put this risk in context.

Researchers

Antonis Damianou, MSc; Brad Dieter, PhD; Nick Milazzo, MS(c); Thomas Reichhart, MSc; Brandon Roberts PhD, MS, CSCS; Lucas Roldos, BSc, MSc(c); Jill Ryer-Powder, PhD; Detrick Snyder, MPH, RDN; Lucas Tafur, PhD; Nattha Wannissorn, PhD, RNH, FDN-P

Editors

Gregory Lopez, MA, PharmD

Reviewers

Stephan Guyenet, PhD & Adel Moussa, PhD

Copy Editor

Dmitri Barvinok

Infographics

Antonius Khengdro & Calla Lee