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Lower fat intake, lower testosterone levels?
This meta-analysis found that swapping out fat for carbs can lower men's testosterone levels a tad. But the relationship's neither set in stone nor straightforward.
Deeper Dive: Can regular exercise and a good diet attenuate age-associated cognitive decline?
This large four-year trial found surprisingly little benefit from diet and exercise on the brain health of older people. Here, we explore some possible reasons for this finding.
Deeper Dive: A Mendelian randomization study sheds light on the effects of polyunsaturated fatty acids on heart disease
This study explored whether genes that bump specific PUFA blood levels led to heart disease and found some evidence for the possible benefits of EPA.
Mini: Phytonutrient supplements for cardiovascular disease markers
A recent umbrella review summarized the effects of plant-based supplements for cardiovascular disease markers. Be careful with directly comparing the numbers they report though!
Betaine supplementation: a double-edged sword for CVD markers
This meta-analysis suggested that betaine doses under 4 grams daily can lower homocysteine without necessarily raising LDL-C, but there's still a lot of uncertainty.
Investigating the efficacy of protein supplementation for older people with and without resistance training
This randomized controlled trial found that protein supplementation needs to be paired with heavier resistance training to help keep older people's muscles healthy.
Deeper Dive: Flavonoids may slightly speed up recovery from muscle-damaging exercise
According to this recent meta-analysis, flavonoid-containing polyphenolic supplements can slightly improve muscle soreness and strength after a single bout of heavy exercise.
Mini: Sports nutrition tips for active women
We provide some of the big-picture takeaways from a recent narrative review covering nutritional strategies for active women.
Deeper Dive: A spoonful of vinegar might make blood sugar go down
Acetic acid may help with glycemic control while lowering triglycerides, but the studies included in this meta-analysis had a high risk of bias.
Deeper Dive: Cinnamon may improve biomarkers of metabolic diseases
This meta-analysis found cinnamon supplementation can improve lipid levels, blood pressure, glycemic control, and waist circumference in adults with metabolic diseases. While these results are promising, there are still quite a few open questions.
A modified keto diet may slow some declines associated with Alzheimer’s disease
This recent trial found that a keto diet helped people with mild Alzheimer's disease perform activities of daily living while improving their quality of life.
Nulls: January-February 2021
Get a quick rundown of recent studies that found no evidence for an effect in the latest installment of Nulls!
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- Issue #80 (June 2021)
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- Issue #78 (April 2021)
- Issue #77 (March 2021)
- Issue #76 (February 2021)
- Issue #75 (January 2021)
- Issue #74 (December 2020)
- Issue #73 (November 2020)
- Issue #72 (October 2020)
- Issue #71 (September 2020)