example answer from Claude Sonnet 3.5:

I'll evaluate each item and assign an eso level based on the provided scale:

1. NAD+ supplementation:

Eso level: 3

Rationale: While there's growing research interest, it's largely based on observational studies and preliminary clinical trials.

2. Blue light blocking:

Eso level: 2

Rationale: This is based on established principles of light physics and its effects on circadian rhythms, with some causal studies supporting its use.

3. Sun exposure:

Eso level: 1

Rationale: The benefits of sun exposure for vitamin D production and other health effects are well-established in physics and biochemistry.

4. Forest bathing:

Eso level: 4.5

Rationale: While there are some studies showing psychological benefits, it borders on more alternative practices like mindfulness.

5. Cryotherapy:

Eso level: 3.5

Rationale: There's a mix of observational studies and some controlled trials, but long-term effects and mechanisms are not fully established.

6. Wim Hof breathing:

Eso level: 5

Rationale: While there are some studies on its effects, it incorporates elements of meditation and alternative breathing techniques.

7. Grounding:

Eso level: 6

Rationale: Also known as "earthing," this practice has limited scientific backing and involves concepts similar to energy healing.

8. Ketamine:

Eso level: 2.5

Rationale: As a known chemical compound with established pharmacological effects, it's studied in controlled clinical trials. However, its use in alternative settings slightly increases its eso level.

These ratings are based on the current state of scientific evidence and general perception of these practices. The eso levels may change as more research is conducted and our understanding evolves.