Q: What is the most important safety warning for this product?
A: Stop use and consult a health care practitioner if you experience sweating, paleness, chills, headache, dizziness and/or confusion, as these may be symptoms of serious low blood sugar. Alpha-lipoic acid activates AMPK and enhances insulin-stimulated glucose uptake into cells via GLUT4 transporter translocation. At supplemental doses, this glucose-lowering effect can cause blood sugar to drop, particularly in individuals with diabetes who are already taking glucose-lowering medications. Consult a health care practitioner prior to use if you are pregnant, breastfeeding, or have diabetes.
Q: What are the Health Canada approved uses for this product?
A: This product is approved by Health Canada (NPN 80122537) as an antioxidant, to help support glucose metabolism, and as a factor in the maintenance of good health. Please verify the exact approved use language against the NPN 80122537 licence. This product is not intended to diagnose, treat, cure, or prevent any disease.
Q: What is alpha-lipoic acid and what makes it chemically distinctive?
A: Alpha-lipoic acid (ALA), also known as thioctic acid, is a sulfur-containing eight-carbon fatty acid with a distinctive dithiolane ring structure. At carbons 6 and 8 of the fatty acid chain, two sulfur atoms are connected by a disulfide bond, forming a five-membered dithiolane ring. This disulfide bond is the basis for ALA's redox activity: the oxidized form (ALA, with the disulfide bond intact) is reduced to dihydrolipoic acid (DHLA) by the mitochondrial enzyme lipoamide dehydrogenase using NADH or NADPH. The ALA/DHLA redox couple is the foundation of both its cofactor function in mitochondrial enzyme complexes and its antioxidant activity at supplemental doses. ALA is synthesized endogenously in the mitochondria from octanoic acid and cysteine by the enzyme lipoic acid synthase, but endogenous synthesis produces only small amounts sufficient for cofactor function. Supplemental doses of 600mg far exceed endogenous production, delivering free ALA available for antioxidant activity throughout the body.
Q: What is the difference between DL-ALA and R-ALA?
A: Alpha-lipoic acid has one chiral center (at carbon 6), producing two mirror-image forms called enantiomers: R-ALA (the naturally occurring, biologically active form) and S-ALA (the synthetic enantiomer produced during chemical synthesis). DL-ALA is the racemic mixture of both enantiomers in equal proportions (50% R-ALA and 50% S-ALA). R-ALA is the form used as a cofactor in mitochondrial enzyme complexes and has higher bioavailability than S-ALA. DL-ALA is more chemically stable and more cost-effective than pure R-ALA. At 600mg of DL-ALA per capsule, the formula provides approximately 300mg of the biologically active R-ALA enantiomer alongside 300mg of S-ALA. Pure R-ALA supplements are also available at a higher cost; DL-ALA is the most widely studied form in clinical research.
Q: How does ALA function as a mitochondrial enzyme cofactor?
A: In its endogenous role, ALA is covalently bound (via an amide bond to a lysine residue) to the E2 subunit of two critical mitochondrial enzyme complexes. The first is the pyruvate dehydrogenase complex (PDC), which converts pyruvate (the end product of glycolysis) to acetyl-CoA, the entry molecule for the citric acid cycle. This is the irreversible step that commits glucose-derived carbon to oxidative energy production. The second is the alpha-ketoglutarate dehydrogenase complex (KGDC), which catalyzes the conversion of alpha-ketoglutarate to succinyl-CoA, a key step within the citric acid cycle itself. In both complexes, the lipoyl group (ALA bound to the E2 subunit) functions as a swinging arm that transfers acyl groups between the active sites of the complex. ALA is therefore an essential cofactor at two of the most critical steps in mitochondrial energy metabolism, linking glycolysis to the citric acid cycle and sustaining the cycle itself.
Q: Why is ALA called a universal antioxidant?
A: Most antioxidants are active in only one cellular compartment: vitamin C is water-soluble and active in the aqueous cytoplasm and extracellular fluid; vitamin E is fat-soluble and active in lipid membranes. ALA is unusual in that it is active in both aqueous and lipid environments, allowing it to provide antioxidant protection across all cellular compartments. This is the basis for the description of ALA as a universal antioxidant. DHLA (the reduced form of ALA) directly scavenges reactive oxygen species including superoxide, hydroxyl radicals, and hypochlorous acid, and quenches singlet oxygen. ALA also chelates pro-oxidant metal ions including copper, iron, cadmium, and mercury, reducing their ability to catalyze free radical generation via the Fenton reaction.
Q: How does ALA regenerate other antioxidants?
A: One of ALA's most significant antioxidant properties is its ability to regenerate other antioxidants that have been oxidized in the process of neutralizing free radicals. DHLA reduces dehydroascorbate back to vitamin C (ascorbic acid). Vitamin C in turn reduces the tocopheroxyl radical back to vitamin E (alpha-tocopherol). DHLA also directly reduces oxidized glutathione (GSSG) back to reduced glutathione (GSH), replenishing the body's primary endogenous antioxidant. This antioxidant network regeneration means that ALA amplifies the antioxidant capacity of the entire system: DHLA regenerates vitamin C, vitamin C regenerates vitamin E, and DHLA regenerates glutathione, all from a single ALA molecule cycling between its oxidized and reduced forms.
Q: How does ALA support glucose metabolism?
A: Supplemental ALA activates AMPK (AMP-activated protein kinase), a cellular energy sensor that promotes glucose uptake into cells by stimulating the translocation of GLUT4 glucose transporters to the cell surface in muscle and adipose tissue. ALA also activates the insulin signaling pathway downstream of the insulin receptor, enhancing insulin-stimulated glucose uptake. These mechanisms are the basis for the glucose metabolism support claim and are also the reason why ALA can cause blood sugar to decrease, which is the basis for the diabetes caution and the hypoglycemia stop-use warning. Individuals with diabetes or those taking glucose-lowering medications should consult a healthcare practitioner before use.
Q: How should I take this product?
A: Adults: 1 capsule, 1 time per day. The 60 capsule bottle provides a 60 day supply. Consult your healthcare provider to determine the appropriate dosage and duration of use for your individual needs.
Q: Is this product suitable for vegans and vegetarians?
A: Yes. DL-alpha-lipoic acid is a synthetically produced compound with no animal-derived components. The capsule shell is made from hypromellose (vegetable cellulose), not gelatin. The non medicinal ingredients (microcrystalline cellulose, silicon dioxide, and hypromellose) are all suitable for vegans. The product is non GMO and free from gluten, soy, dairy, and corn.
