Holiday ski trips have a familiar script. You fly from near sea level to a resort town in the Rockies, sleep at 9,000 feet that same night, and wake up with a pounding headache, a queasy stomach, and legs that feel a decade older. Many people blame the travel day or the welcome drinks. Often it’s the altitude.
The supplement industry has noticed. “Altitude adjustment” capsules, chlorophyll drops, canned oxygen, and ginkgo blends line the shelves of resort-town shops. Before you add them to your packing list, here’s what the evidence says, and what’s worth the space in your bag.
What Altitude Does to You
As you climb, air pressure drops and each breath delivers less oxygen. Your body compensates by breathing faster and deeper, raising heart rate, and, over days to weeks, making more red blood cells. That adjustment takes time, and when you ascend faster than you adapt, symptoms appear.
Acute mountain sickness becomes common above roughly 8,000 feet (2,500 m). Plenty of Western ski resorts have base villages at or above that level, with lifts reaching 11,000 to 12,000 feet. The typical picture is headache plus some combination of nausea, fatigue, dizziness, and poor sleep, starting within 6 to 12 hours of arrival and usually easing over one to three days.
Susceptibility is individual and hard to predict. Physical fitness doesn’t protect you; fit people sometimes fare worse because they push harder on day one. The best predictor is how you’ve responded at altitude before.
The Supplements Marketed for Altitude
Ginkgo Biloba
Ginkgo is the best-known herbal candidate. A few small early trials reported fewer altitude symptoms in people who took it before ascending, usually at around 120 mg twice daily started several days ahead. Then a larger, well-controlled trial compared ginkgo against both placebo and the standard prescription medication: the medication worked, and ginkgo performed no better than placebo.
Researchers have suggested that differences between ginkgo products might explain the inconsistency, but that leaves you unable to know whether any given bottle is one of the “good” ones. Wilderness medicine guidance does not recommend it for prevention.
There’s also a practical concern. Ginkgo has a mild blood-thinning effect and interacts with anticoagulant and antiplatelet drugs. Skiing and snowboarding involve falls and collisions, and a supplement that might increase bleeding, in exchange for an unproven benefit, is a questionable trade.
Antioxidant Blends
The theory is that low oxygen increases oxidative stress, so vitamins C and E and alpha-lipoic acid might help. One small early trial was encouraging. A larger, better-designed trial that followed found no reduction in altitude sickness. This is a common trajectory in supplement research, and the later, larger result deserves more weight.
Beetroot and Nitrates
Dietary nitrate supports nitric oxide production and has reasonable evidence for exercise efficiency at sea level, so testing it at altitude made sense. Results have been inconsistent, and at least one controlled study reported more altitude headache with nitrate supplementation, not less. There’s no good case for adding beetroot specifically for a mountain trip.
Rhodiola, Cordyceps, and “Altitude” Formulas
These herbs carry traditional associations with high-mountain regions, and that history is the main basis for their marketing. Controlled studies of rhodiola in low-oxygen conditions have not shown convincing benefit, and proprietary altitude blends generally haven’t been tested as finished products at all.
Chlorophyll Drops and Canned Oxygen
Liquid chlorophyll is a resort-town staple sold on the claim that it boosts oxygen-carrying capacity. There is no meaningful evidence for this. Recreational oxygen canisters deliver a few breaths of extra oxygen whose effect fades within moments; they bear no resemblance to the continuous medical oxygen used to treat serious altitude illness.
Iron: Important, But Not a Quick Fix
Iron is the one nutrient with a clear physiological link to altitude adaptation, because your body needs it to build the extra red blood cells that altitude demands. Endurance athletes preparing for multi-week altitude training camps routinely have their ferritin checked, and those with low stores are given iron beforehand.
For a week of skiing, this matters much less. Red blood cell changes take weeks, so iron taken on the trip won’t change how you feel on the mountain. And iron is not a supplement to take on a hunch: excess iron causes digestive side effects, can be harmful to people with iron-overload conditions, and is dangerous to children in overdose. The adult upper limit is 45 mg per day of elemental iron unless a clinician directs otherwise.
If you’re often fatigued, menstruate heavily, eat little or no meat, or have struggled at altitude before, asking for a ferritin test before a big trip is reasonable. Our iron page covers forms and dosing for people with a confirmed need.
What’s Worth Packing
Electrolytes and a water bottle. Mountain air is very dry, and you breathe faster at altitude, so you lose more water than you realize, even in the cold. Dehydration produces headache and fatigue that mimic and compound altitude symptoms. Drinking enough won’t prevent altitude sickness itself, and forcing down excessive plain water isn’t helpful, but steady fluids through the day are sensible. On long, sweaty ski days a drink with some sodium helps you retain what you drink. Our electrolytes guide explains what to look for. People with kidney disease, heart failure, or on blood pressure medication should check before adding sodium or potassium products.
Low-dose melatonin. Sleep at altitude is often fragmented, and travel across time zones adds to it. Melatonin at 0.5 to 3 mg, taken 30 to 60 minutes before bed, may help with travel-shifted sleep timing, and it doesn’t appear to suppress breathing the way some sleep medications and alcohol can. Evidence specific to altitude is limited. Avoid it if pregnant or nursing, and check with your prescriber if you take blood thinners, immunosuppressants, or seizure medication.
Vitamin D, if it’s already part of your winter routine. You’ll be covered head to toe on the slopes, so a ski trip is not a meaningful sun source despite the strong UV. A typical maintenance range is 600 to 2,000 IU daily, with an adult upper limit of 4,000 IU. See our piece on winter vitamin D needs for more.
Carbohydrates and regular meals. Appetite often drops at altitude while energy expenditure climbs. Eating regular, carbohydrate-containing meals is a practical priority and needs no supplement.
Sunscreen and lip balm. UV intensity rises with elevation and snow reflects most of it back at you. No pill replaces sun protection.
One note on caffeine: if you drink coffee daily, keep drinking it. Stopping abruptly on a trip causes withdrawal headaches that are easy to mistake for altitude sickness.
What Works Better Than Any Supplement
- Break up the ascent. A night at an intermediate elevation, such as a city at around 5,000 feet before heading to a 9,000-foot resort, is among the most effective steps you can take.
- Take the first day easy. Save the hardest runs for day two or three.
- Go light on alcohol for the first 48 hours. It disrupts sleep, contributes to dehydration, and its effects blur into altitude symptoms.
- Talk to your doctor if you’ve had altitude trouble before. A prescription preventive medication with strong evidence exists, and whether it suits you is a decision for a clinician who knows your history.
People with heart or lung conditions, sickle cell disease, or who are pregnant should get medical advice before traveling to high elevation.
Know the Red Flags
Ordinary altitude sickness is unpleasant but improves with rest. Rarely, it progresses to something dangerous. Descend and seek medical care promptly if anyone in your group develops:
- A headache that keeps worsening despite rest and fluids
- Confusion, unusual drowsiness, or stumbling and loss of coordination
- Breathlessness at rest, or a persistent wet cough
- Repeated vomiting
These can signal swelling in the brain or fluid in the lungs, both emergencies. Resort medical clinics see altitude illness constantly and are well equipped for it.
Bottom Line
No supplement has been shown to reliably prevent altitude sickness. Ginkgo’s early promise didn’t hold up in larger trials, antioxidant blends followed the same path, and chlorophyll drops and canned oxygen have nothing behind them. Iron matters for altitude adaptation but only helps people who are truly deficient, and not within the span of a ski week. What earns a place in your bag is modest: electrolytes and a water bottle, perhaps low-dose melatonin (0.5-3 mg) for disrupted sleep, and your usual winter vitamin D. The real protection comes from ascending gradually, starting slowly, limiting alcohol, and knowing when symptoms mean it’s time to head downhill.
This article is educational and not medical advice. Consult a healthcare provider before starting any supplement or traveling to high altitude, especially if you are pregnant, nursing, taking medication, or managing a health condition.