Weekly research updates

Highlights this week:

Vitamin D: Umbrella review of meta-analyses — CRP and IL-6 drop significantly with supplementation

Curcumin: Systematic review on exercise recovery + RCT for knee osteoarthritis (with MSM and piperine)

Collagen: First SR of RCTs on skin health outcomes in a top-tier journal

Caffeine: Multilevel meta-analysis confirms swimming performance effects

L-Carnitine: Meta-analysis shows lipid profile improvements in overweight women