This Serrapeptase works well and is a good value for the money. It's a high potency value for the money. I've been been using it for about a month now and my stamina is better and I've had less shortness of breath. I'll be buying more when I run low.

Noticed a definite increase in endurance when taking ALCAR before and during exercise. Was able to set several new PRs on my usual cycling circuit while supplementing with ALCAR and have even used it halfway through a long hike for an energy boost.

I've been purchasing supplements from Double Wood for several years. Their products are always the highest quality and are shipped quickly.