Answer these based on your typical baseline (not your worst-ever crash).
Key terms
Baseline – how you feel on a typical day when you have not recently overdone it (not in a full PEM crash).
Light physical activity – gentle movement such as 5–10 minutes of easy walking or light chores that most people would consider mild.
Orthostatic stress – symptoms that change when you are upright (sitting or standing), especially still standing (e.g., in a line).
Moderate exercise – brisk walking, cycling, or climbing stairs for several minutes at a pace you can usually manage when you are “doing okay” for you.
A13. During or after moderate exercise (brisk walking, cycling, or climbing stairs for several minutes at a pace you can do), what tends to worsen the most?
Muscle symptoms: heaviness, weakness, or burning in the muscles is the main problem.
Brain/perfusion symptoms: head pressure, mental fog, trouble thinking, or sensory overload is the main problem.
Autonomic symptoms: heart rate spikes, strong palpitations, feeling too hot or shaky is the main problem.
Mainly a general tired/fatigued feeling without a clear dominant symptom.
I rarely attempt this level of activity, or my response is too variable to describe.
None of the above / unsure.
Answer based on your worst crashes after clearly overdoing it (post-exertional malaise, PEM).
Key terms
PEM (post-exertional malaise) – a delayed and prolonged worsening of symptoms after physical, mental, or emotional exertion.
Deep crash – your worst episodes, where function is clearly below baseline and recovery can take days to weeks.
Trigger – the exertion (or stressor) that clearly preceded the crash (e.g., big outing, overdoing chores, long conversation, heat exposure).
Multi-day low – a period of 2+ days where symptoms remain clearly worse than your usual baseline after a crash.
B1. In a full, deep PEM crash after overdoing it, which cluster is the most dominant overall?
Muscle-dominant: legs/arms feel heavy, weak, or “cemented”; moving around is very difficult; recovery takes days to weeks.
Perfusion/brain-dominant: head pressure, cognitive shutdown, sensory overload, “can’t think at all” is the main problem.
Autonomic-dominant: heart racing, temperature swings, shaky/wired feeling, unstable blood pressure or heart rate dominate.
Crushing flu-like crash: heavy malaise and a “systemic flu” feeling dominate more than any one organ system.
Mainly gastrointestinal / bile-toxic: nausea, upper abdominal heaviness, belching, “bile-ish” or poisoned feeling dominates.
Mixed, but muscle symptoms are clearly the worst part.
Mixed, but brain/perfusion symptoms are clearly the worst part.
None of the above / unsure / crashes vary too much to answer.
These questions look at circulation, microcirculation, immune/inflammatory flares, volume/salt responses,
and bile/food reactions to help estimate a possible SMPDL3B pattern.
Based on the BA-GLA / SMPDL3B disease concept v2.1 . This is research-oriented and
not a medical diagnosis or treatment guide. Answer based on your
typical baseline pattern unless otherwise specified.
Key terms
Salt + water loading – roughly 1–2 g sodium (e.g., 2–4 standard 500–600 mg sodium tablets or equivalent salt) taken with about 500–1000 ml water over 20–40 minutes , unless medically contraindicated. A small salt tablet with a few sips of water is not a full salt load.
Vasodilating supplements – e.g., high-dose niacin, citrulline/arginine, beetroot/nitrate products, or other supplements that noticeably widen blood vessels or make you feel “flushed” or “opened up.”
Protein shakes – pea, whey, or casein-based shakes or blends (not pure collagen) with a typical serving of 15–30 g protein taken as a drink.
Pre-workout (non-caffeine) – products marketed to boost performance that do not primarily rely on caffeine (often contain creatine, beta-alanine, citrulline/arginine, etc.).
MCAS-like flare – episodes of flushing, burning, itching, swelling, hives, or feeling “inflamed and reactive” even from small triggers.
These questions look at how your symptoms change with fasting, meals, fat/choline, time of day, exertion, and meal timing.
Answer based on your typical pattern .
Key terms
Fasting – not eating for an extended period (for example, overnight before breakfast or intentionally delaying a meal).
Post-meal window – the 30–90 minutes after eating when digestion and bile flow are most active and symptoms may shift.
Fat/choline-rich foods – foods like eggs, fish, bone broth, organ meats, or choline/PC supplements that strongly engage bile-acid and hepatic pathways.
Delayed “sick” window – a delayed period 6–24 hours after exertion when nausea, gut upset, or a “poisoned” feeling can appear or ramp up.
D3. Response to fatty or choline-rich foods
Examples: eggs, fish, bone broth, organ meats, or choline/phosphatidylcholine supplements.
They often make me feel worse (nauseous, heavy, foggy, “poisoned,” or wired).
I don’t notice a clear pattern with these foods.
They often make me feel better (calmer, clearer, more stable).