Kim Kardashian recently launched an energy drink called Update that markets itself as zero sugar, zero calories, and free of artificial flavors and colors. Instead of caffeine, Update’s primary stimulant is paraxanthine — the main molecule the body produces when it breaks down caffeine. The brand says this ingredient provides steady energy without the jitters, crashes, or sleep disruption associated with many traditional energy drinks.
What paraxanthine is
Paraxanthine is one of three major caffeine metabolites made in the liver; the other two are theobromine and theophylline. Experts note paraxanthine is the predominant breakdown product and may avoid some unwanted effects linked to theobromine and theophylline, such as anxiety, nausea, diarrhea, or rapid heartbeat. Paraxanthine and caffeine act similarly in the brain by blocking adenosine receptors, increasing wakefulness and producing comparable physiological responses (for example, higher blood pressure and adrenaline).
Early research and safety
Preclinical and early studies suggest paraxanthine can promote alertness at least as well as equivalent doses of caffeine. Rodent data also indicate lower toxicity at high doses compared with caffeine. That said, caffeine has far more extensive research and a long track record of use; paraxanthine is an emerging alternative with promising but limited human data. Individual responses vary, so it’s not possible yet to say categorically that paraxanthine is better for everyone.
Other ingredients in Update
Update includes several common supplement and beverage ingredients:
– L-theanine: an amino acid found in tea that can promote calm, focused attention, especially when paired with stimulants. Its effect depends on dose, which is not always disclosed on product labels.
– Alpha-GPC: a choline source that supports acetylcholine production and is promoted for cognitive support. Typical doses are generally considered safe, though very high choline intakes have been linked with cardiovascular concerns, and mild side effects (headache, nausea, dizziness) can occur.
– Methylcobalamin (B12): a bioavailable form of vitamin B12 that supports energy metabolism and neurological health; it most benefits people who are deficient, and excess water-soluble B12 is usually excreted.
– Sucralose: an artificial sweetener used to keep calories and sugar low.
What clinicians recommend
Health professionals advise treating new supplements and energy drinks cautiously. Key practical points:
– Talk with your healthcare provider before trying a new stimulant, particularly if you have cardiovascular issues, anxiety, are pregnant, nursing, or take medications.
– Start with a small amount to assess tolerance, since individual reactions vary.
– Check ingredient lists and, when possible, active compound amounts; lack of clear dosing makes effects harder to predict.
– Occasional use is likely fine for most healthy people, but frequent reliance on energy drinks can mask underlying problems such as poor sleep, nutritional deficits, or stress.
Bottom line
Update introduces paraxanthine as a novel stimulant alternative to caffeine and combines it with familiar cognitive-supporting ingredients. Early data are encouraging about paraxanthine’s alerting effects and tolerability, but robust human trials are limited. If you’re curious, consult your clinician, use caution, and prioritize sleep, nutrition, and lifestyle approaches before turning to stimulant products for sustained energy.
