Klean Antioxidant by Klean Athlete

If hard training leaves you wiped for days, this pairing fits. Acetyl L-carnitine and alpha lipoic acid are most useful for endurance and high-volume athletes, adults with low mental energy, and people whose fasting glucose or A1c (average blood sugar over ~3 months) sits higher than they’d like. Vegetarians and older adults, who often have lower carnitine stores and mitochondrial efficiency, are common responders. If you want deep triglyceride reduction or big shifts in hs-CRP (an inflammation marker), this isn’t the direct tool.

Acetyl L-carnitine shuttles fatty acids into mitochondria (your cell power plants) to be burned for energy, and it also supports acetylcholine (a neurotransmitter tied to attention). Alpha lipoic acid is a rare antioxidant that works in both water and fat environments and helps regenerate glutathione (the liver’s main detox antioxidant). Together they improve cellular energy and redox balance, which is why some see steadier endurance and clearer focus within 1–2 weeks, with glucose and nerve comfort changes typically in 4–8 weeks. Astaxanthin quenches singlet oxygen from intense exercise, while maqui berry anthocyanins and vitamin C recycle other antioxidants; biotin supports enzymes that process carbs and fats.

Take the three-capsule daily dose with a meal, as alpha lipoic acid can cause nausea on an empty stomach. Morning or early afternoon suits most, since acetyl L-carnitine can feel stimulating. If you also take mineral supplements (iron, magnesium, zinc), separate by 2–4 hours because lipoic acid can bind minerals. Keep your usual labs on schedule: recheck fasting glucose, A1c, and, if relevant, liver enzymes like ALT after 8–12 weeks.

If you use insulin or diabetes medications, monitor for lower glucose and discuss dose adjustments with your clinician. Take thyroid hormone (levothyroxine) at a different time of day, as carnitine can blunt hormone entry into cells; hypothyroid patients should keep dosing consistent and separated. Biotin can interfere with some lab immunoassays, so pause it for 48–72 hours before thyroid or troponin testing. During active chemotherapy or radiation, don’t add antioxidants without oncology guidance. Pregnancy and breastfeeding: safety data are limited, so avoid unless your clinician advises otherwise.