Short answer: This fibre expands on contact with liquid. Always take your dose with a full glass of water and never immediately before lying down — a genuine instruction rather than a formality.
Why this instruction is more than a formality
Glucomannan is a soluble fibre from konjac root that absorbs water and expands, supporting fullness and digestive comfort — a mechanism that specifically depends on adequate liquid.
Who should avoid glucomannan products entirely
People with any difficulty swallowing, or a narrowing anywhere in the digestive tract, should avoid glucomannan products entirely — a direct, unconditional exclusion.
⚠️ Worth knowing: do not take it dry or immediately before lying down — two specific, practical instructions worth following exactly as stated.