The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
First of all, it's a buffer against acidity. You don't want muscle to get too acidic because it can't function. You don't want any body tissue to get too acidic. So that burn that you feel is acidity in that environment and lactate what most people call lactic acid, but again, we don't make lactic acid. Lactate is there to buffer that to reduce the amount of burn.
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Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
It's also a fuel. When you feel that burn, lactate is shuttled to those areas of the muscle, and there's an actual fuel burning process where in the absence of oxygen you can continue to generate muscular contractions.