Krill Oil Cut Muscle Loss on a Fasting Diet by Up to 6x in a Trial
Dieting hard often means losing muscle along with fat, but a new randomized trial suggests one supplement may change that. In 41 adults doing 8 weeks of alternate-day fasting, krill oil and placebo groups lost the same body weight (about 4.6 vs 4.5 kg). Yet the krill group lost just 0.2 kg of fat-free mass versus 1.2 kg for placebo, and held onto handgrip strength too. Before you stock up, there are catches: the sample was small and the capsule also contained astaxanthin and choline. Here are the numbers, the dose and who should skip it.
Fish Oil Swapped Fat for Muscle in 6 Weeks. Scale Didn't Budge.
What if the scale doesn't move, but your body quietly trades fat for muscle? A double-blind trial of 44 healthy adults found that 6 weeks of fish oil (about 2.4 g EPA+DHA daily) shifted body composition by roughly half a kilo each way, with body weight unchanged. A drop in salivary cortisol tracked with the changes, though that link is only correlational. Resting metabolic rate didn't budge, and the sample was small. Here's what the numbers really show, and how to use them sensibly.
Cinnamon + Tabata Beat Training Alone for Fat Loss in 8-Week Trial
A humble kitchen spice may have given Tabata trainers an extra edge in an 8-week trial. Men who took 1.5 g of cinnamon daily alongside high-intensity circuits lost 7.86% body fat, significantly more than those who trained alone (p = 0.013). Inflammation dropped and irisin rose most in the combination group, while insulin changes appeared across all training groups. But with only about ten men per group, and cinnamon alone failing to match the combo, this is promising rather than proven. Here's the circuit, the dose and the coumarin catch you need to know.