Scarlett Johansson is one of Hollywood’s most recognizable actors, but her approach to fitness has never been limited to looking good on camera.
For years, Johansson has trained for physically demanding roles that required strength, mobility, endurance and stunt work. As Natasha Romanoff, or Black Widow, in the Marvel films, she performed an unusually demanding combination of strength training, conditioning and fight preparation. Away from movie sets, she has also described exercise as an important part of her mental wellbeing.
Scarlett Johansson has been working professionally since childhood and became one of the most commercially successful and critically recognized actors of her generation.
Her breakthrough came with films such as Lost in Translation and Girl with a Pearl Earring, followed by major roles in films including Match Point, The Prestige, Vicky Cristina Barcelona, Marriage Story and Jojo Rabbit.
She became a global blockbuster star through the Marvel Cinematic Universe, where she played Natasha Romanoff, better known as Black Widow.
Johansson first appeared as Black Widow in Iron Man 2 in 2010 and subsequently appeared in several Marvel films, including The Avengers, Captain America: The Winter Soldier, Avengers: Age of Ultron, Captain America: Civil War, Avengers: Infinity War, Avengers: Endgame and finally Black Widow.
Her Marvel work required a very different physical preparation from a conventional acting role.
In a Vanity Fair interview, Johansson recalled entering a gym in Los Angeles when she was preparing for her early action work and feeling completely unfamiliar with the equipment. Trainer Bobby Strom helped introduce her to functional training.
Her later preparation became significantly more sophisticated.
For Ghost in the Shell, trainers Ryan and Eric Johnson described an eight-week preparation period followed by approximately six months of continued training during production. Johansson worked on her back, shoulders, glutes and hamstrings, while exercises such as pull-ups were used to build strength and the physique required for the character. The trainers reported that she progressed from approximately three pull-ups to eight.
That progression is worth remembering when looking at her supplements.
The visible result was not created by vitamins alone.
It came from structured training, recovery, nutrition, stunt preparation and consistency, with supplements playing a supporting role.
The phrase “fitness comeback” is often used loosely in celebrity coverage, but Johansson’s story is not really a conventional comeback.
She has repeatedly returned to intensive training when a film role required it.
After becoming a mother, for example, Johansson told Vogue that her general fitness routine remained broadly similar. She described her workouts as a combination of endurance, stability and strength training and said she liked full-body athletic workouts.
For her, exercise has also been about mental wellbeing.
In a 2023 British Vogue interview, Johansson said she tried to exercise at least four days a week and described Pilates as something she enjoyed, alongside more demanding workouts. She also spoke about using short naps to recover during the extremely long working days typical of film production.
By 2024, she described her non-film training in similarly practical terms: around an hour of exercise three or four days a week, with Pilates remaining a favorite.
So the better description is not a “Scarlett Johansson fitness comeback.”
It is a long-running training habit that becomes more intense when a role demands it.
There is a surprisingly clear answer to the question, “What supplements does Scarlett Johansson take?”
In an interview with Refinery29, Johansson was asked directly whether she took supplements. She said she had started because she felt depleted, which she believed was related to breastfeeding, and named vitamins C and D, calcium, magnesium, B-complex and omega-3s.
Those six nutrients form the basis of this list.
However, they should not all be treated as performance-enhancing supplements.
Some are basic micronutrients.
Some are relevant to bone and muscle function.
Omega-3 is a fatty acid rather than a vitamin or mineral.
And magnesium has become particularly relevant to Johansson’s personal sleep and recovery routine.
Vitamin C is the first supplement Johansson named in her publicly discussed regimen.
Her reason for starting the group of supplements was personal rather than performance-oriented: she said she felt depleted after breastfeeding and began supplementing several nutrients.
That distinction matters.
There is no evidence that Johansson takes vitamin C specifically to build muscle or accelerate her Black Widow workouts.
Vitamin C is a foundational nutrient.
The body cannot produce it on its own, so it must come from food or supplements. The NIH’s Office of Dietary Supplements says vitamin C is required for collagen production, L-carnitine synthesis and certain neurotransmitters. It also functions as an antioxidant and contributes to normal immune function.
Johansson has not publicly identified a particular vitamin C manufacturer as the brand she uses.
That means an article claiming she takes a specific brand would be going beyond the available evidence.
Vitamin C is manufactured by hundreds of supplement companies worldwide, from large pharmaceutical and nutrition companies to specialist sports-nutrition brands.
The more useful question is whether the product provides an appropriate amount of vitamin C and comes from a reputable manufacturer with appropriate quality controls.
Vitamin C has several established physiological roles.
It contributes to:
It is also involved in protein metabolism and the production of certain neurotransmitters.
But more is not automatically better.
The body tightly regulates many nutrients, and extremely high supplemental doses can cause problems such as gastrointestinal discomfort.
For most people, vitamin C is not something they should “feel” working.
It is more accurate to think of it as nutritional infrastructure.
Someone eating plenty of fruits and vegetables may already obtain substantial vitamin C from food. In that situation, a supplement may add relatively little.
Someone with a poor diet or increased nutritional needs may have a different situation.
That is why Johansson’s original explanation is important: she wasn’t presenting vitamin C as a secret Hollywood fat burner. She described it as part of a broader effort to address what she felt was nutritional depletion.
Vitamin D was the second vitamin Johansson named in her supplement routine.
Like vitamin C, vitamin D is not a “superhero supplement.”
It is a nutrient the body needs for normal physiological function.
The NIH explains that vitamin D is involved in calcium absorption and bone health, among other biological processes. It can come from certain foods, supplements and exposure to ultraviolet B radiation from sunlight.
For an actor whose career has included years of physically demanding stunt and fight training, maintaining adequate vitamin D status is relevant—but that does not mean high-dose supplementation is necessary.
Johansson has not publicly named a vitamin D brand.
Vitamin D supplements are widely available in forms such as vitamin D3 (cholecalciferol) and vitamin D2 (ergocalciferol).
The appropriate product and dose depend on individual circumstances.
That is particularly important because vitamin D is fat-soluble, meaning excessive intake can accumulate and cause toxicity.
Vitamin D contributes to:
The nutrient is especially relevant when someone has inadequate vitamin D status.
It is therefore more useful to ask, “Does this person need more vitamin D?” than “What is the highest-dose vitamin D supplement available?”
Vitamin D is unlikely to create the immediate sensation of energy that people associate with caffeine.
Its value is much more fundamental.
Adequate vitamin D helps support normal bone and muscle physiology. That matters for an active person, but it matters for everyone else too.
For people concerned about deficiency, a healthcare professional can determine whether testing is appropriate.
Johansson’s use of vitamin D should therefore be viewed as part of her individual nutritional routine—not as evidence that every person should take the same dose.
Calcium is particularly interesting because it is easy to overlook when discussing fitness.
People often associate calcium exclusively with milk or childhood bone development, but the mineral remains important throughout adulthood.
Johansson included calcium in the group of supplements she said she started taking after feeling depleted while breastfeeding.
The NIH describes calcium as the most abundant mineral in the human body. It forms much of the structure of bones and teeth and also participates in muscle contraction, nerve transmission, blood clotting and other physiological processes.
Again, Johansson has not publicly identified a particular calcium brand.
Calcium supplements are commonly sold as:
The form matters because absorption can differ.
According to the NIH, calcium citrate is less dependent on stomach acid for absorption than calcium carbonate, while calcium carbonate is generally taken with food.
Calcium supports:
For women in particular, long-term bone health becomes increasingly important with age.
But calcium supplementation should not be treated as automatically beneficial for everyone.
If a person already obtains adequate calcium from food, adding large amounts of supplemental calcium may not provide additional advantages and can introduce risks.
Calcium is one of those nutrients whose importance becomes obvious mainly when something goes wrong.
Adequate calcium supports normal movement and skeletal strength.
For an active person performing resistance training, running, Pilates or martial-arts-style movements, healthy bones are part of the foundation that makes those activities possible.
But the ideal source is often food.
Dairy products, fortified plant milks, calcium-set tofu, some leafy greens and certain fish can contribute meaningful amounts of calcium.
A supplement is best viewed as a way to fill a dietary gap—not as a replacement for a calcium-rich diet.
Of the six supplements associated with Johansson, magnesium currently has the strongest connection to her daily routine.
In August 2026, Us Weekly reported on Johansson’s magnesium habit after she discussed it in multiple interviews. She has described taking magnesium at night and said she associates it with better sleep and recovery. She has also discussed its role in digestion.
This is a particularly interesting development because magnesium has moved from a relatively obscure mineral into mainstream wellness culture.
Johansson herself acknowledged that “everybody is taking magnesium now” when discussing her routine.
No specific magnesium manufacturer has been publicly identified as Johansson’s preferred brand.
The mineral is available from a large number of supplement companies in different forms, including:
These forms are not identical.
The NIH notes that absorption varies between different forms of magnesium and that citrate, lactate, chloride and aspartate tend to have greater bioavailability than magnesium oxide and magnesium sulfate.
Magnesium participates in hundreds of biochemical reactions.
The NIH identifies roles in:
That broad biological role explains why magnesium is relevant to active people.
But it also explains why it has become popular as a general wellness supplement.
Johansson says it helps her sleep more soundly.
That is her personal experience, not proof that magnesium will improve sleep in everyone.
Research into magnesium and sleep is still developing, and the strongest rationale for supplementation is generally related to inadequate intake or specific circumstances rather than assuming everyone has a magnesium deficiency.
There is another important point: magnesium supplements can cause diarrhea and abdominal cramping when taken in excessive supplemental amounts. The NIH lists 350 mg per day as the adult tolerable upper intake level specifically from supplements and medications, not from food.
This is where Johansson’s description becomes particularly relatable.
She has described magnesium as part of her evening wind-down routine.
For someone with a demanding job, frequent travel or a physically active lifestyle, the goal is not to create a sudden boost.
It is to support the transition from an active day to recovery.
Johansson has also experimented with different forms. She previously used a topical magnesium spray but said it dried her skin, leading her to stop using it.
Her experience highlights an important point: the most popular form of a supplement is not necessarily the most appropriate form for every person.
Johansson also specifically mentioned a B-complex supplement.
Unlike a single nutrient such as vitamin D, B-complex products typically combine several B vitamins in one formula.
Depending on the product, this can include:
Johansson did not publicly identify the specific B-complex brand or formulation she used.
There is no verified “Scarlett Johansson B-complex.”
B-complex supplements are manufactured by a wide range of nutrition companies, and formulations vary significantly.
That makes label reading important.
A product can contain relatively modest amounts of each vitamin, while another may contain many times the recommended daily amount.
More is not necessarily better.
B vitamins are involved in energy metabolism, red blood-cell production, nervous-system function and other metabolic processes.
Vitamin B12, for example, is required for normal red-blood-cell formation, DNA synthesis and nervous-system function.
This is where celebrity marketing often becomes misleading.
B vitamins are frequently described as “energy vitamins.”
Technically, they help the body metabolize nutrients and participate in energy-producing pathways.
But taking a large dose does not automatically create extra energy in someone who already has adequate levels.
For a person who is deficient in one of the B vitamins, correcting that deficiency can be important.
For someone who already gets enough through food, the effect may be much less noticeable.
Johansson’s reason for starting a B-complex was part of a broader nutritional strategy after breastfeeding rather than a claim that B vitamins transformed her workouts.
That is a more sensible way to interpret the supplement.
The final supplement Johansson has publicly named is omega-3.
Unlike the other five, omega-3 is not a vitamin or mineral.
It is a group of polyunsaturated fatty acids. The three that receive the most scientific attention are ALA, EPA and DHA.
The NIH notes that EPA and DHA are especially prominent in research involving fish and fish-oil supplements.
Johansson included omega-3s in the group of supplements she started after feeling depleted during breastfeeding.
Johansson has not publicly named the omega-3 manufacturer she uses.
Omega-3 supplements are commonly sold as:
The relevant information on a label is not simply the total amount of “fish oil.”
Consumers should look at the actual quantities of EPA and DHA.
Omega-3 fatty acids have been extensively studied for cardiovascular health and other physiological effects.
The NIH notes that research has focused heavily on EPA and DHA obtained from seafood and supplements.
Fatty fish also provide protein, vitamin D, selenium and other nutrients, which is why food remains an important source.
For people who eat little or no seafood, supplementation can be a convenient way to increase omega-3 intake.
Omega-3 is not something most people take because they expect to feel an immediate effect.
Its role is nutritional and long-term.
For someone who rarely eats oily fish, an omega-3 supplement may help increase EPA and DHA intake.
For someone who eats salmon, sardines, mackerel or other oily fish regularly, the calculation is different.
This is another reason celebrity supplement routines should not be copied automatically.
Protein powder is frequently included in online versions of the “Scarlett Johansson diet.”
There are also numerous websites claiming that Johansson used plant protein while preparing for Black Widow.
However, the evidence is not as clean as it is for the six supplements above.
Some celebrity fitness websites list plant protein, multivitamins, omega-3s and pre-workout products as part of her routine.
But these sites are not equivalent to a direct interview with Johansson.
That distinction matters.
There is good scientific evidence that adequate protein is important for people engaged in resistance training. Harvard’s Nutrition Source notes that people undertaking strenuous exercise to build or maintain muscle may require higher overall protein intake, with the International Society of Sports Nutrition generally recommending approximately 1.4–2.0 grams of protein per kilogram of body weight per day for such individuals.
But that does not prove that a particular protein powder is Johansson’s current supplement.
Therefore, it is more accurate to discuss protein as part of the nutrition strategy surrounding her training, rather than adding a specific protein brand to her verified supplement list.
Her publicly discussed diet has generally been more practical than the internet mythology surrounding celebrity fitness would suggest.
During her training years, media reports have described high-protein meals and relatively simple foods, while Johansson herself has spoken about eating meals such as egg wraps and turkey sandwiches.
In interviews, she has also pushed back against the idea that fitness requires extreme restriction.
The broader picture is therefore more important than any one meal.
Johansson trains.
She eats.
She recovers.
And when she has a particularly demanding film role, the training becomes more structured and intensive.
The supplements sit around that foundation.
| Supplement | Why Johansson Has Discussed Taking It | Main Physiological Role | Evidence Context |
|---|---|---|---|
| Vitamin C | Part of her post-breastfeeding supplement routine | Collagen production, antioxidant function, immune support | Well-established essential nutrient |
| Vitamin D | Part of her supplement routine | Bone, calcium and muscle-related functions | Particularly important when intake/status is inadequate |
| Calcium | Part of her supplement routine | Bones, teeth, muscles and nerve signaling | Essential nutrient; supplementation depends on dietary intake |
| Magnesium | Sleep, recovery and digestion | Muscle/nerve function and hundreds of biochemical reactions | Essential nutrient; evidence for specific sleep benefits is still developing |
| B-complex | Part of her supplement routine | Energy metabolism, nervous system and blood-cell functions | Useful for meeting requirements; extra amounts are not automatically better |
| Omega-3 | Part of her supplement routine | EPA/DHA intake and broader physiological functions | Strong research base, but benefit depends partly on dietary intake |
It is not that she takes six supplements.
It is why she takes them.
Her original explanation was not that she had discovered a secret Hollywood formula.
She said she felt depleted after breastfeeding and started supplementing several nutrients.
That is fundamentally different from the way celebrity supplement routines are often presented online.
There is no evidence that Johansson believes vitamin C, calcium or omega-3s are responsible for her Black Widow physique.
And there is no evidence that these six supplements alone explain her fitness.
Her physical preparation involved months of structured training, experienced coaches, stunt work, strength development and recovery.
The supplements are supporting players.
The biggest lesson is not to copy the entire stack.
It is to understand the difference between nutritional adequacy and supplementation.
If someone already eats a varied diet containing fruits, vegetables, dairy or fortified alternatives, fish, whole grains, nuts and seeds, they may already be getting many of these nutrients.
Supplements become more relevant when there is a documented deficiency, increased requirement, restricted diet, limited food variety or another specific reason.
Magnesium provides a useful example.
Johansson says it helps her sleep and recovery. That is a legitimate description of her personal experience. But it should not be converted into the claim that magnesium is a universal sleep treatment.
The same principle applies to vitamin D.
If a person is deficient, correcting the deficiency matters.
If their vitamin D status is already adequate, taking increasingly large doses is not necessarily useful.
Calcium works the same way.
Omega-3 works differently again because dietary fish intake becomes a major part of the equation.
And B-complex supplements should not be confused with an energy drink.
The body needs B vitamins for metabolism, but that does not mean megadoses provide unlimited energy.
There is no single answer for all six.
Vitamin C is an essential nutrient with well-established biological functions, but many people can obtain enough from food.
Vitamin D is important for bone and muscle physiology, particularly when vitamin D status is inadequate.
Calcium is fundamental to bones, teeth, muscles and nerve signaling, but supplementation should take dietary intake into account.
Magnesium has a broad role in the body and is the supplement Johansson currently discusses most enthusiastically, particularly in connection with sleep and recovery. Her personal experience should not be confused with universal clinical evidence.
B-complex vitamins support several metabolic and neurological processes, but taking more than the body requires does not automatically create more energy.
Omega-3s can be useful for increasing EPA and DHA intake, particularly for people who eat little oily fish.
Perhaps the most important point is that Scarlett Johansson herself has not presented these supplements as a magic formula for getting a superhero body.
Her fitness transformation for Black Widow came from a professional training program designed around the physical demands of the role. Her trainers have described months of strength, conditioning and movement work, while Johansson has repeatedly said that exercise remains part of her mental wellbeing as well as her physical health.
Her supplement routine is therefore best understood as personal nutrition management rather than a celebrity prescription.
And that makes it considerably more interesting.
The real story behind Scarlett Johansson’s fitness is not six bottles on a countertop.
It is years of training, adapting to different roles, maintaining consistency and finding a routine that can survive the realities of work, family and an exceptionally demanding career.
Supplements can fill nutritional gaps.
They cannot do the training for you.
Scarlett Johansson has publicly discussed taking vitamins C and D, calcium, magnesium, B-complex and omega-3s, but she has not publicly established a single branded “Scarlett Johansson supplement stack” covering these nutrients. The article therefore does not attribute particular manufacturers or dosages to her without evidence. Supplement needs vary according to diet, age, medical history, medications and nutritional status. Anyone considering supplementation—particularly higher-dose vitamin D, calcium or magnesium—should discuss individual needs with a qualified healthcare professional.
