A foodstuff of a tablet or capsule, includes: an extract of a plant of genus Salacia; and at least one of calcium carbonate and silicon dioxide in an amount of 1% by mass or more based on the total mass of the tablet or capsule, wherein 50% inhibition concentration of sucrase is 10 \u03bcgml or more and 300 \u03bcgml or less. The optical pickup actuator includes a base, a bobbin, a holder, and a magnetic driver. The solar simulator employs a plurality of concave cylindrical mirrors and a plurality of flat mirrors that reflect and redirect images of an illuminated light source such that an observer at a target area outside the housing will perceive multiple instances of the illuminated light source. The coils can also be used to produce mechanical drag on the system as desired to brake the turbine in high wind conditions or for maintenance.