Vitamin E for Cats

Antioxidant protection for cell membranes, with daily nutrition that also supports cellular energy and healthy aging

By La Petite Labs Editorial 18 min read

As Seen On

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Hollywood Elixir® Senior Cat Supplement

Contains 15 IU Vitamin E

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Contents

Vitamin E for cats starts with a useful job: helping protect the fats in cell membranes from oxidation. It is an essential nutrient supplied by food, and researchers have also studied how additional vitamin E affects feline immune cells and antioxidant measurements. 1 3 4

For an adult or senior cat, Hollywood Elixir brings vitamin E into a full 17-active formula for cellular energy, antioxidant support and healthy aging. Its value lies in the combination: an NAD+ precursor, mitochondrial cofactors, antioxidants and ingredients selected to support immune health, prepared together for the daily meal. 15

Vitamin E contributes to membrane protection in cats. This guide explains actual feline research, fish-oil and mixed-tocopherol labels, supplement forms and individual portions. Hollywood Elixir connects vitamin E with complementary antioxidant ingredients and energy-related nutrients in a full 17-active formula for adult and senior cats.

Vitamin E protects the fats that help cells function

Cell membranes contain fats that form a boundary around each cell. Those fats can undergo oxidation. Vitamin E helps limit that damage, which gives it a normal nutritional role across tissues, including skin, muscle and nervous tissue. 1

Membrane protection is part of cellular health for cats: the same basic nutritional job matters wherever cells need to maintain their boundaries.

Vitamin E is one member of a larger antioxidant system. Other molecules and enzymes handle different reactions, so the whole system is more useful to understand than a single “antioxidant strength” score. 14

Woman kneeling with two long-haired tabby cats while holding a Hollywood Elixir box beside a food bowl

Complete food provides the nutritional foundation

A complete and balanced food is formulated to meet nutrient requirements for its intended life stage. Vitamin E belongs within that foundation, alongside protein, fats and other vitamins and minerals. 1

An additional supplement needs its own purpose. That might be a veterinarian-directed response to an identified nutritional problem, or a broader formula chosen for cellular-energy and healthy-aging nutrition. These are different decisions from making an incomplete diet adequate.

Start with what your cat actually eats: the main food, substantial toppers and existing supplements. Our cat vitamins and supplements guide helps put individual ingredients in that wider feeding picture.

Woman exercising beside a tabby cat, with a Hollywood Elixir box and food bowl on a small table

Feline research found a measurable immune-cell response

A 2015 study fed adult cats nine complete diets with different additions of vitamin E and selenium for 28 days. Cats receiving the vitamin-E-enriched diets showed greater lymphocyte proliferation when their immune cells were stimulated in laboratory tests. Selected combinations also increased phagocytosis, the process by which certain immune cells engulf material. 3

That is a positive finding about immune-cell function. The study did not establish fewer infections or a longer life, and its food concentrations are not instructions for dosing a cat at home.

Orange-and-white cat reaching toward a woman holding a Hollywood Elixir box while sitting in a chair

An enriched food improved antioxidant measurements in healthy cats

In a 2024 study, 40 healthy adult cats ate one of four complete foods for 84 days. The enriched foods contained more vitamin E, with added vitamin C and beta-carotene. Blood vitamin E rose. Cats eating the highest-vitamin-E food had higher total antioxidant power and more DNA retained in white-blood-cell nuclei in the Comet laboratory assay. 4

Greater DNA retention in that assay indicates less migration of damaged DNA. These were laboratory findings from a particular food blend, rather than evidence of a visible coat change or extra years of life. Hill’s funded the study, and the authors were current or former employees.

The oxidative stress guide explains the broader balance between oxidation and the body’s defenses.

Gray-haired man holding a Hollywood Elixir box while two cats rest beside him in an armchair

Skin and coat appearance need more than one nutrient

Vitamin E’s membrane role helps explain its place in skin nutrition. It does not mean every dull coat signals low vitamin E or that adding a capsule will improve the coat on a predictable schedule.

A specific deficiency-related condition is steatitis, inflammation of fatty tissue. Veterinary references describe it with unbalanced diets high in unsaturated fat and inadequate in vitamin E, historically including diets made largely from fish. A painful cat, or one reluctant to move or eat, needs veterinary assessment and correction of the feeding problem. 10

This is different from feeding a complete fish-based cat food. Keep the distinction between an unbalanced diet and a properly formulated food when deciding whether an additional product is useful.

Vitamin E helps protect the fats in cell membranes from oxidation.

Fish oil raises a question about the whole feeding plan

Fish oil supplies polyunsaturated fats. Their susceptibility to oxidation is one reason antioxidant protection matters in a food or oil formulation. The useful question is how the particular oil, its portion and the rest of the diet fit together—not simply whether “fish oil needs vitamin E.” 1 5

One cat owner’s fish-oil question began with a product marketed for dogs and uncertainty about using it for a cat. That is an individual experience, not evidence of what most owners do or a dosing recommendation. It highlights a sensible next step: read the actual cat directions and contents before adding another supplement.

Tabby cat looking up at a Hollywood Elixir sachet held above it, with the product box on a small table

Mixed tocopherols may be there to keep a product fresh

“Preserved with mixed tocopherols” usually describes protection of the fats inside the food or oil. Tufts’ veterinary nutrition explanation identifies tocopherols among the preservatives used to slow oxidation and spoilage. 5

That label tells you a preservative is present. By itself, it does not tell you how much nutritional vitamin E your cat receives in a daily portion. Look separately for a declared vitamin E amount and serving basis if the product is being sold for that purpose.

This distinction makes a crowded label easier to read: protecting the contents of a bottle and supplying a measured nutrient portion are related jobs, but the information needed for each is different.

Hand gently petting an orange-and-white cat beside a food bowl and Hollywood Elixir box

Read the form, amount and serving basis together

Vitamin E is a family of compounds. Labels often name alpha-tocopherol: d-alpha or RRR-alpha denotes the naturally occurring form, while dl-alpha or all-rac-alpha denotes a synthetically produced mixture of forms. Acetate and succinate are forms used in supplement ingredients. 2

An amount may be stated in IU, a measure of activity, or mg, a measure of mass. Conversion depends on the form; the numbers cannot simply be exchanged. A study’s “mg per kg of food” also describes food concentration, not milligrams per kilogram of the cat’s body weight.

For a practical example, Hollywood Elixir declares vitamin E as D-alpha Tocopheryl Acid Succinate 1210, 15 IU per full 2.5 g sachet. Read that alongside the product’s daily portion, rather than treating it as a prescription for every cat. 15

Man holding a Hollywood Elixir box beside a black cat, an orange tabby and a food bowl

Choose a format your cat will take and you can measure

Look for clear labeling, a realistic serving size, and a form your cat will reliably take. Oil, a capsule and a food-mixed powder each need the same basic information: contents, concentration and the intended portion.

A cat owner describing vitamin E capsule oil said their cat licked it from their cuticles. They then asked what would happen if the cat got hold of a whole capsule. That single account is a useful question, not feeding evidence: liking the taste does not establish that the capsule’s full contents suit a cat.

Have the exact product checked before using a human supplement. The amount and additional ingredients matter more than the fact that it is an oil or capsule. Veterinary supplement guidance likewise emphasizes the actual product and directions. 6

Daily use should have a clear purpose and portion

Vitamin E already arrives through food. When adding a product, review its portion alongside the cat’s food, other supplements and medicines. Long-term high oral doses can cause adverse effects; VCA’s guidance lists nausea, weakness and fatigue. 6

The research above measured immune cells and blood or DNA-related markers. It does not establish a timetable for a shinier coat or more energy after starting an isolated vitamin E supplement. Choose the product for a documented nutritional purpose, and discuss a new appetite, activity or health change on its own merits.

In healthy adult cats, a food enriched with vitamins E and C plus beta-carotene improved measured antioxidant power.

Silver tabby sitting beside a food bowl and a Hollywood Elixir box held in a person's hand

DVM Voice: Clinical Vignette of a Common Pattern in Senior Cat Aging

Case provided by JoAnna Pendergrass, DVM

Sasha, a 12-year-old cat, was brought in after her owner noticed increased thirst and urination, lethargy, vomiting, and a generally unkempt appearance. Examination showed weight loss, elevated blood pressure, and reduced vitality.

Diagnostic testing revealed elevated kidney markers, poorly concentrated urine, and protein loss in the urine — findings consistent with chronic kidney disease, one of the most common chronic conditions in senior cats.

Her care required a kidney-focused diet, blood pressure management, targeted supplementation, medication support, and regular monitoring — a necessary plan, but one started after clinical signs were already visible.

Clinical takeaway: Sasha’s case reflects why senior-cat wellness should begin before obvious decline. Earlier monitoring, body-condition tracking, hydration awareness, antioxidant support, and daily cellular resilience may help support quality of life as cats age.

Single-case vignette. Not generalizable. Veterinary diagnosis and monitoring are essential for increased thirst, urination, vomiting, lethargy, weight loss, or suspected kidney disease.

Explore Hollywood Elixir Research →
Woman holding a Hollywood Elixir box toward a brown cat perched on the back of a sofa

Extra vitamin E has not delivered the hoped-for kidney benefits

Two feline studies help answer questions about vitamin E and kidney disease.

In a randomized placebo-controlled trial, 36 cats enrolled and 24 completed three months. Added oral vitamin E did not improve the measured oxidative-stress or anemia-related outcomes. The study received Winn Feline Foundation funding. 7

A later trial included 34 cats with chronic kidney disease, comparing additional vitamin E with placebo alongside the same renal food and standard care. Blood vitamin E increased, but extra supplementation did not improve clinical signs or survival. 8

Those results support choosing supplements around the individual renal feeding and treatment plan.

Woman leaning toward a fluffy orange cat beside a Hollywood Elixir box and green food bowl

The thyroid study tested a combination alongside medication

In a blinded trial of cats treated with methimazole, researchers tested a paste containing curcumin, quercetin, resveratrol and vitamin E. Thirty cats completed the study. Some oxidative-status markers improved with the mixture; clinical signs improved in both groups, with a between-group difference at only one early visit. Dog Power partly funded the work. 9

The result belongs to that four-ingredient paste and treatment setting. It cannot isolate vitamin E’s contribution or establish an effect for Hollywood Elixir. For a cat receiving methimazole for hyperthyroidism, discuss any addition alongside the existing medication and feeding plan.

Tabby cat licking its nose beside a food bowl and Hollywood Elixir box

Hollywood Elixir connects antioxidant care with cellular energy

Hollywood Elixir combines 17 actives for daily cellular energy, antioxidant support and healthy aging. Vitamin E is part of a prepared formula that also includes an NAD+ precursor, mitochondrial cofactors, other antioxidants, plant ingredients and ingredients selected to support immune health. 15

The prepared combination lets you bring complementary nutritional support into the same daily portion, without choosing separate precursor, vitamin and antioxidant products.

For an adult or senior cat, that combination connects the membrane protection discussed here with the energy metabolism needed for ordinary cell activity. Explore Hollywood Elixir for the complete daily formula.

The full 17-active formula, with its declared amounts

These are the 17 named preparations and amounts per full 2.5 g sachet. An ingredient’s stated concentration is part of the declaration: for example, the astaxanthin preparation is 2%, and the B12 preparation is 1%. 15

  • Astaxanthin 2% (natural): 2 mg
  • Vitamin E, D-alpha Tocopheryl Acid Succinate 1210: 15 IU
  • Beta Glucan, Beta-1,3/1,6-D-Glucan Powder from Saccharomyces cerevisiae: 50 mg
  • Coenzyme Q10 98% (Ubidecarenone): 40 mg
  • Vitamin B12, Methylcobalamin Trit 1% on DCP: 0.25 mg
  • Nicotinamide Riboside Tartrate: 60 mg
  • L-Glutathione Reduced: 50 mg
  • Resveratrol Extract, standardized to 98% from Polygonum cuspidatum: 15 mg
  • Quercetin Dihydrate 95%: 25 mg
  • Reishi Mushroom Powder P.E., standardized to 35% polysaccharides: 25 mg
  • Organic Spirulina Powder: 50 mg
  • Vitamin B3, as Niacin: 2 mg
  • Vitamin B6, as Pyridoxal 5-Phosphate: 1 mg
  • Vitamin B2, as Riboflavin USP: 0.5 mg
  • Blueberry Fruit Powder: 50 mg
  • Whey Protein Isolate 90%: 250 mg
  • Vitamin C, as Ascorbic Acid: 10 mg

Additional ingredients are chicken flavor, chicken liver powder, yeast extract, glycine and hydroxypropyl beta-cyclodextrin. The full ingredient page provides the current formulation details.

Different ingredients contribute to the antioxidant design

Vitamin E’s role centers on membrane fats. Reduced glutathione participates in a different part of normal antioxidant chemistry: glutathione peroxidase uses it while processing peroxides. These are complementary biological roles. 1 14

Hollywood Elixir also brings together vitamin C, astaxanthin, quercetin and resveratrol within its antioxidant design. Beta glucan and reishi are ingredients selected to support immune health; spirulina and blueberry supply further plant ingredients, while whey contributes protein. The full formula places those choices alongside the energy-related ingredients described below. 15

The separate feline food studies and normal biochemical roles do not establish clinical effects for the finished Hollywood Elixir blend.

Tabby cat sitting at a table with a food bowl and Hollywood Elixir box

NAD and CoQ10 connect the formula to food energy

Cells turn nutrients from food into usable energy through many linked reactions. NAD+ and NADH carry electrons through parts of that process. Nicotinamide riboside, or NR, supplies a precursor that cells can convert through NMN into NAD+. The mechanistic study cited here examined mouse muscle cells; it explains a pathway rather than demonstrating an oral supplement outcome in cats. 11

CoQ10 has another job: it carries electrons within the mitochondrial energy-producing system. Vitamin B2 supplies FMN and FAD, cofactors used by energy-related enzymes. 12 13

Hollywood Elixir includes NR tartrate, CoQ10 and B2 alongside B3, B6 and B12. Together with its antioxidant and immune-support ingredients, they give the 17-active formula its broader purpose: nutrition for cellular energy and healthy aging. 15

See how cells make, use and recycle NAD+ in our NADome and NADomics guide.

Woman cuddling a silver tabby and a cream-colored cat while holding a Hollywood Elixir box

Use the adult portion and review the whole formula

Hollywood Elixir’s current daily directions are based on body weight: 16

  • Under 7 lb: half a sachet
  • 7–30 lb: one sachet
  • Over 30 lb: two sachets

Mix into the usual food and serve immediately. The ingredient amounts above describe a full 2.5 g sachet. If the cat has a prescribed diet or takes other supplements, review the complete ingredients and portions together. Bring the actual bottles to appointments.

La Petite Labs states that the product is made in the USA in a cGMP-compliant, NASC Preferred Supplier facility, with third-party checks for heavy metals and microbial contamination. Its public COA lookup provides access to batch-linked reports. These are manufacturing and testing details, separate from clinical efficacy. 17

Choose one full formula for energy and healthy aging

Choose Hollywood Elixir when you want antioxidant nutrition and cellular-energy support together in a 17-active daily formula. Vitamin E, reduced glutathione and the other antioxidant ingredients sit alongside an NAD+ precursor, mitochondrial cofactors and ingredients selected for immune health. The combination comes prepared for the meal. 15

If the question is a diagnosed deficiency or a medical use of vitamin E, the individual veterinary plan determines the product and amount. For broader healthy-aging nutrition, Hollywood Elixir offers a defined full-formula choice. Our guide to the biology of feline aging explains why cellular processes deserve attention alongside food and everyday care.

Choose Hollywood Elixir for daily cellular-energy and antioxidant support, then use the portion for your adult cat’s weight.

Hollywood Elixir combines 17 actives for daily cellular energy, antioxidant support and healthy aging.

Educational content only. This material is not a substitute for veterinary advice. Always consult your veterinarian about your cat’s specific needs. These statements have not been evaluated by the Food and Drug Administration. Products mentioned are not intended to diagnose, treat, cure, or prevent any disease.

Glossary

  • Cell membrane: The boundary around a cell, containing fats and proteins.
  • Oxidation: A chemical process involving loss of electrons; its effects depend on the reaction and setting.
  • Fat-soluble vitamin: A vitamin absorbed with dietary fat; vitamin E belongs to this group.
  • Tocopherols: Members of the vitamin E family; mixtures can also be used to preserve fats in foods.
  • IU: International unit, a measure of biological activity rather than mass.
  • Lymphocyte: A type of immune cell.
  • Comet assay: A laboratory method that assesses DNA damage through its migration from cell nuclei.
  • NAD+/NADH: A cofactor pair involved in food-energy metabolism.
  • Mitochondria: Cell structures with a central role in producing usable energy.
  • Cofactor: A component needed for an enzyme’s work.

Related Reading

References

Numbered references identify the sources used for specific claims. Read the study design, species and evidence boundaries alongside each finding.

  1. Sherry Lynn Sanderson. Nutritional Requirements of Small Animals. 2024Evidence boundary: Veterinary nutrition guidance on vitamin E, membrane protection and balanced feeding.↩ 1 · ↩ 2 · ↩ 3 · ↩ 4 · ↩ 5 · ↩ 6 · ↩ 7 · ↩ 8
  2. NIH Office of Dietary Supplements. Vitamin E: Fact Sheet for Health Professionals. 2021Evidence boundary: NIH information on vitamin E chemistry, ingredient forms and label units; human intake recommendations differ from feline use.↩
  3. O’Brien T, Thomas DG, Morel PC, Rutherfurd-Markwick KJ. Moderate dietary supplementation with vitamin E enhances lymphocyte functionality in the adult cat. 2015· DOI 10.1016/j.rvsc.2015.01.007Evidence boundary: A 28-day adult-cat feeding study measuring immune-cell responses to vitamin E and selenium.↩ 1 · ↩ 2 · ↩ 3
  4. Jewell DE, Motsinger LA, Paetau-Robinson I. Effect of dietary antioxidants on free radical damage in dogs and cats. 2024· DOI 10.1093/jas/skae153Evidence boundary: An 84-day complete-food study in healthy cats and dogs, with species-specific antioxidant and DNA-damage measurements; funded by Hill’s.↩ 1 · ↩ 2 · ↩ 3
  5. Lisa M. Freeman, DVM, PhD, DACVIM (Nutrition). “Preservative-Free” Pet Food? 2022Evidence boundary: A veterinary nutrition explanation of preservatives, including tocopherols, in pet foods.↩ 1 · ↩ 2
  6. Alison Hamilton, DVM. Vitamin E + Selenium. 2025Evidence boundary: Veterinary guidance on vitamin E/selenium products, individual use and route-specific adverse effects.↩ 1 · ↩ 2 · ↩ 3 · ↩ 4 · ↩ 5
  7. Timmons RM, Webb CB. Vitamin E supplementation fails to impact measures of oxidative stress or the anaemia of feline chronic kidney disease: a randomised, double-blinded placebo control study. 2016· DOI 10.1002/vms3.21Evidence boundary: A placebo-controlled trial of oral vitamin E in feline chronic kidney disease, funded by Winn Feline Foundation.↩
  8. Krofič Žel M, Tavčar Kalcher G, Vovk T, Žegura B, Lusa L, Tozon N, Nemec Svete A. Supplementation of vitamin E as an addition to a commercial renal diet does not prolong survival of cats with chronic kidney disease. 2024· DOI 10.1186/s12917-024-04176-8Evidence boundary: A feline kidney-disease trial of additional vitamin E alongside renal food and standard care.↩
  9. Candellone A, Badino P, Gianella P, Girolami F, Raviri G, Saettone V, Meineri G. Evaluation of Antioxidant Supplementation on Redox Unbalance in Hyperthyroid Cats Treated with Methimazole: A Blinded Randomized Controlled Trial. 2020· DOI 10.3390/antiox9010015Evidence boundary: A trial of a four-ingredient antioxidant paste alongside methimazole in hyperthyroid cats; partly funded by Dog Power.↩
  10. Joseph Harari, MS, DVM, DACVS. Muscle Disorders in Cats. 2024Evidence boundary: Veterinary guidance on feline muscle disorders, including steatitis associated with unbalanced feeding.↩
  11. Rachel S Fletcher, Joanna Ratajczak, Craig L Doig, Lucy A Oakey, Rebecca Callingham, Gabriella Da Silva Xavier, Antje Garten, Yasir S Elhassan, Philip Redpath, Marie E Migaud, Andrew Philp, Charles Brenner, Carles Canto, Gareth G Lavery. Nicotinamide riboside kinases display redundancy in mediating nicotinamide mononucleotide and nicotinamide riboside metabolism in skeletal muscle cells. 2017· DOI 10.1016/j.molmet.2017.05.011Evidence boundary: Mouse muscle-cell research describing NR and NMN metabolism and NAD+ synthesis.↩
  12. Reactome. Complex I oxidises NADH to NAD+, reduces CoQ to CoQH2. n.d.Evidence boundary: A molecular pathway record describing electron transfer from NADH to CoQ in mitochondrial complex I.↩
  13. NIH Office of Dietary Supplements. Riboflavin: Fact Sheet for Health Professionals. 2022Evidence boundary: NIH information on riboflavin and its FMN/FAD cofactor roles.↩
  14. Reactome. Detoxification of Reactive Oxygen Species. n.d.Evidence boundary: Curated molecular pathways describing normal reactive-oxygen handling and glutathione-dependent reactions.↩ 1 · ↩ 2 · ↩ 3
  15. La Petite Labs. Hollywood Elixir®: current ingredient declaration. n.d.Evidence boundary: The manufacturer’s complete Hollywood Elixir declaration, including all 17 preparations and amounts.↩ 1 · ↩ 2 · ↩ 3 · ↩ 4 · ↩ 5 · ↩ 6 · ↩ 7 · ↩ 8
  16. La Petite Labs. Hollywood Elixir® Longevity System: serving and purchase options. n.d.Evidence boundary: Current manufacturer adult portions and directions for mixing with food.↩ 1 · ↩ 2 · ↩ 3 · ↩ 4
  17. La Petite Labs. Publicly verified lab results and COA Lookup. n.d.Evidence boundary: Manufacturer information on facility standards, contaminant testing and batch-report access.↩ 1 · ↩ 2

FAQ

What is vitamin e for cats, in plain terms?

Vitamin E is an essential fat-soluble nutrient that helps protect fats in cell membranes from oxidation. Complete food supplies it as part of normal nutrition; an additional supplement should have a defined purpose. 1

How does vitamin E work inside a cat’s body?

Its central antioxidant role is protection of membrane lipids. Other defenses handle different reactions: for example, glutathione participates in peroxide processing. Vitamin E belongs within that wider cellular system. 1 14

Is vitamin e for cats safe for daily use?

Suitability depends on the amount, formula, cat and existing feeding plan. Review extra vitamin E alongside food, medicines and other supplements. Hollywood Elixir has specific adult weight-based portions; an individual medical use of vitamin E needs its own veterinary directions. 6 16

What side effects can vitamin E cause in cats?

Long-term high oral doses can cause nausea, weakness and fatigue. If a new supplement seems to cause a problem, stop it and contact your veterinarian with the product and amount. 6

Which form is better: vitamin e oil or capsules?

Neither format is automatically better. Check the complete ingredients, concentration, intended portion and whether your cat will take it. A human capsule’s full contents are not automatically a suitable feline serving. Food-mixed powders are another option with their own directions. 6 16

How quickly will I notice results after starting vitamin E?

The feline studies discussed here do not establish a general timetable for visible changes in coat or activity. They measured specific immune-cell or antioxidant responses. For a diagnosed problem, agree with your veterinarian on what improvement to assess and when. 3 4

What should I look for in the best vitamin e supplement?

Look for the form, amount per portion, full ingredients, directions and quality information. Choose a purpose as well: Hollywood Elixir combines 17 actives for cellular energy, antioxidant support and healthy aging, with 15 IU of its declared vitamin E ingredient per full 2.5 g sachet. 15 17

Can kittens take vitamin E, or is it for adults?

Kittens need vitamin E through appropriate growth nutrition. An additional supplement should be chosen with their veterinarian rather than copied from an adult plan. Hollywood Elixir is positioned for adult and senior pets; its routine adult portions are not a kitten recommendation. 1 16

Orange-and-white cat beside a Hollywood Elixir box held in a person's hand

Discover LPL-01: How This Fits Into a Larger Feline Longevity System

Aging in cats unfolds quietly. It’s not driven by a single failure, but by gradual shifts across interconnected systems — cellular energy, oxidative balance, immune tone, and tissue integrity — each influencing the others over time.

This article explores one layer of that system. To understand what actually shapes long-term health, you need to step back and look at how these layers interact.

Start with the underlying science:

Keep exploring

What would you like to understand next?

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