06/14/2026
everyone's brain chemistry is unique, so what works for one person might not for another, says D'Adamo. That said, these four types might have promise:
L-theanine: This supplement seems to enhance the mental effects of caffeine and counteract caffeine-induced jitteriness, D'Adamo says. Research has shown that combining caffeine and L-theanine may help you multitask better. The safest way to get this combo is by drinking pure green tea, which contains both caffeine and L-theanine, but it's also OK to combine your usual coffee or tea with an L-theanine supplement.
Don't take caffeine in pill or power form, as it's too easy to overdo it. Caffeine, in excess, can be toxic, causing a racing heartbeat and even leading to seizures or death. Just 1 teaspoon of pure caffeine powder could have as much caffeine as you’d get from 28 cups of coffee. The FDA, which has cracked down on makers of pure and highly concentrated caffeine products, notes that the difference between a safe amount and a toxic amount is very small.
CDP-choline: Often prescribed in Europe as a drug, CDP-choline has been shown to help memory -- at least in people who have dementia caused by vascular problems in the brain. There are no known side effects, so it's generally considered safe to try.
Creatine monohydrate: Frequently found in body-building supplements, creatine helps build muscle mass. But studies have also found that it may improve reasoning skills and short-term memory in healthy people. It increases levels of a molecule called ATP, which leads to more cellular energy, D'Adamo says. "I take it regularly just for energy. It's very safe." But talk to your doctor first if you have any kidney problems.
Bacopa monnieri: A traditional Indian (ayurvedic) herb, Bacopa monnieri -- also known as brahmi -- has been suggested by some to help the brain processes information faster. It causes the branches of nerve cells (dendrites) to grow, says D'Adamo. He says this process takes some time; expect to wait 4-6 weeks for results. Although it's generally well-tolerated, it may cause abdominal cramping, nausea, and diarrhea.
While combining several of these supplements might seem like a good idea -- and many formulas on the market that do just that -- D'Adamo doesn't recommend it because most of the combos haven't been well-studied. Instead, he suggests trying one or two for a few months, then taking a month off before going back on them or switching to others. His concern is that you can become tolerant to nootropics (including caffeine), which means you'll need more and more for them to work for you.
As with any dietary supplements, you should also keep in mind that the FDA doesn’t closely regulate nootropic supplements the way it does prescription drugs. Look for reputable brands and trust your body: If you notice any side effects or don't see an improvement in the expected timeframe, it's wise to stop.
Vitamin C in a cream or a serum can help fight off the signs of aging and keep skin looking younger.
