K-O - Glossary

Muira Puama

Also called “potency wood”. An herbal preparation from Ptychopetalum olacoides Bentham – a South American tree. Bark/root extracts are often included in various male enhancement supplements for their reputed aphrodisiac effects. Animal experiments suggest it may have antidepressant and antioxidant...

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L-Carnitine Fumarate

A carnitine salt that’s a delivery form of l-carnitine. Fumaric acid is a Krebs Cycle intermediate and food additive.  L-Carnitine Fumarate is promoted in some ads as THE most bioavailable form of l-carnitine, but a 2005 study on piglets demonstrated that the bioavailability of the most common carnitine salts was about the...

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L-Carnitine-L-Tartrate

A carnitine salt that’s a common delivery form of supplemental l-carnitine.  Tartaric acid is a naturally-occurring organic acid found in wine and a variety of plant foods.

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L-Carnitine

An essential metabolite derived from the amino acids lysine and methionine.  Carnitine is frequently added to weight loss supplements due to its critical role in beta-oxidation – the process of turning long-chain fatty acids into energy.  Supplemental carnitine may or may not boost fat oxidation (the data is conflicting) – however it’s a moot point as weight loss supplements rarely provide more than just trace...

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Methyl Hydroxy Chalcone Polymer (MHCP)

The most active compound in cinnamon, which has been shown to have insulin-like effects in-vitro (i.e., in cell culture experiments).  MHCP may be responsible for the improvements in blood sugar levels and insulin sensitivity seen in (some) studies on cinnamon supplementation. Also written as “methylhydroxy chalcone...

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L-Leucine

An essential amino acid and one of the “branched chain amino acids” (BCAAs).  In addition to being a component of body proteins, leucine serves an important function as an initiator of muscle protein synthesis.  Leucine and the other BCAAs (valine and isoleucine) are often taken in supplemental form by bodybuilders, to offset catabolism during workouts and promote post-workout recovery. See the BCAA review for more...

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