low has low hazard low he low head low headroom low health low heart rate low heat low heating low heel low heels low height low hemoglobin low high low hill low hills low house low hum low human low humidity low hydrogen low hygroscopicity low hysteresis low i low idle low illumination low immunity low impact low impact exercise low impedance low implementation low importance low in calories low in carbohydrates low in cholesterol low in cost low in fat low in fiber low in nutrients low in protein low in saturated low in sodium low in sugar low in the sky low in the water low incidence low income low income countries low income families low income households low incomes low increase low index low indicator low inductance low inertia low inflation low initial low input low insertion low installation low intake low intelligence low intensity low interest low interest rate low interest rate environment low interest rates low intermediate low internal low internet low intrinsic low inventory low investment low ionic strength low iron low iron levels low it low key low ki low kick low labor low labour low land low lands low latency low latitudes low leakage low level low level laser low level of education low levels low levels of education low levels of magnesium low levels of potassium low levels of testosterone low levels of vitamin low libido low life