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Photosynthesis, some enzymes and a bird's compass may really use quantum effects. Consciousness and 'quantum healing' borrow the same word for something no one has measured.
Since 2007, physicists have found real quantum effects at work in life: possible coherence in photosynthesis, tunnelling in some enzymes, and a radical-pair reaction that may let birds sense magnetic fields. Since the 1980s, others have used 'quantum' to explain consciousness and healing. Where does the measured science end and the borrowed word begin?
What's measured: coherence in photosynthesis, tunnelling in some enzymes, and a radical-pair reaction in bird cryptochrome. What isn't: that any of it explains consciousness or healing. Those claims borrow the word 'quantum' without the measurement behind it.