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.
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