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Some vitamin D is stored in skeletal muscles – multiple studies

Unfortunately, none of the studies appear to mention what % of 25(OH)D (Calcidiol) is stored in muscles

Vitamin D and Skeletal Muscle: Current Concepts From Preclinical Studies - Dec 2021

JBMR® Plus (WOA), Vol. 5, No. 12, December 2021, DOI: 10.1002/jbm4.10575
Christian M. Girgis1,2,3© and Tara C. Brennan-Speranza1,4,5
1 Faculty of Medicine and Health, University of Sydney, Sydney, NSW, Australia 2Department of Diabetes and Endocrinology, Westmead Hospital, Sydney, NSW, Australia 3Department of Endocrinology, Royal North Shore Hospital, Sydney, NSW, Australia 4School of Medical Sciences, University of Sydney, Sydney, NSW, Australia 5School of Public Health, University of Sydney, Sydney, NSW, Australia

Muscle weakness has been recognized as a hallmark feature of vitamin D deficiency for many years. Until recently, the direct biomo- lecular effects of vitamin Don skeletal muscle have been unclear. Although in the past, some reservations have been raised regarding the expression of the vitamin D receptor in muscle tissue, this special issue review article outlines the clear evidence from preclinical studies for not only the expression of the receptor in muscle but also the roles of vitamin D activity in muscle development, mass, and strength. Additionally, muscle may also serve as a dynamic storage site for vitamin D, and play a central role in the maintenance of circulating 25-hydroxy vitamin D levels during periods of low sun exposure.
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References

Skeletal muscles references

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The Role of Skeletal Muscle in Maintaining Vitamin D Status in Winter - July 2019

Current Developments in Nutrition, Volume 3, Issue 10, October 2019, nzz087, https://doi.org/10.1093/cdn/nzz087
Rebecca S Mason, Mark S Rybchyn, Myriam Abboud, Tara C Brennan-Speranza, David R Fraser

The status of vitamin D is determined mainly by its formation in skin by the photochemical action of solar UVB light (wavelength 290–320 nm) on the precursor 7-dehydrocholesterol. Because of seasonal variation in intensity of solar UV light, vitamin D status falls in winter and rises in summer. It has been presumed that there is no functional store of vitamin D. Thus, to avoid deficiency, a nutritional supply would be required in winter. However, there is now evidence that the main circulating metabolite of vitamin D, 25-hydroxyvitamin D, accumulates in skeletal muscle cells, which provide a functional store during the winter months. The mechanism is mediated by muscle cell uptake of circulating vitamin D–binding protein (DBP) through a megalin-cubilin membrane transport process. DBP then binds to cytoplasmic actin to provide an array of high-affinity binding sites for 25-hydroxyvitamin D [25(OH)D]. The repeated passage of 25(OH)D into and out of muscle cells would account for its long residence time in blood.
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Skeletal Muscle and the Maintenance of Vitamin D Status - 2020

Nutrients 2020, 12(11), 3270; https://doi.org/10.3390/nu12113270
by Mark S. Rybchyn 1ORCID,Myriam Abboud 1,2ORCID,David A. Puglisi 1,Clare Gordon-Thomson 1,Tara C. Brennan-Speranza 1,3,Rebecca S. Mason 1ORCID andDavid R. Fraser 4,*ORCID

Vitamin D, unlike the micronutrients, vitamins A, E, and K, is largely obtained not from food, but by the action of solar ultraviolet (UV) light on its precursor, 7-dehydrocholesterol, in skin. With the decline in UV light intensity in winter, most skin production of vitamin D occurs in summer. Since no defined storage organ or tissue has been found for vitamin D, it has been assumed that an adequate vitamin D status in winter can only be maintained by oral supplementation. Skeletal muscle cells have now been shown to incorporate the vitamin D-binding protein (DBP) from blood into the cell cytoplasm where it binds to cytoplasmic actin. This intracellular DBP provides an array of specific binding sites for 25-hydroxyvitamin D (25(OH)D), which diffuses into the cell from the extracellular fluid. When intracellular DBP undergoes proteolytic breakdown, the bound 25(OH)D is then released and diffuses back into the blood. This uptake and release of 25(OH)D by muscle accounts for the very long half-life of this metabolite in the circulation. Since 25(OH)D concentration in the blood declines in winter, its cycling in and out of muscle cells appears to be upregulated. Parathyroid hormone is the most likely factor enhancing the repeated cycling of 25(OH)D between skeletal muscle and blood. This mechanism appears to have evolved to maintain an adequate vitamin D status in winter.
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VitaminDWiki - Getting Vitamin D into your body chart

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138+ VitaminDWiki pages with MUSCLE, etc in the title

This list is automatically updated

Items found: 140
Title Modified
Magnesium helps muscles in more than 10 ways - Dec 2023 18 Oct, 2024
Muscles and Vitamin D - many studies 13 Aug, 2024
Bladder cancer in muscles 2.7 times more-likely if vitamin D less than 20 ng -meta-analysis May 2024 23 May, 2024
Muscle strength improved with Calfidediol (a form of vitamin D) - meta-analysis May 2022 29 Feb, 2024
Muscle Inflammation (idiopathic inflammatory myopathy) 3.2 X more likely if low Vitamin D – meta-analysis Feb 2024 29 Feb, 2024
Handgrip and Vitamin D - many studies 20 Feb, 2024
Female preemies become women with low hand grip strength - Dec 2023 24 Dec, 2023
Omega-3 helps muscles - many studies 16 Nov, 2023
Fatigue reduced by Vitamin D (Cancer, muscle, MS, age, etc) - many studies 12 Nov, 2023
Skeletal Muscles regenerated with Vitamin D supplementation – review Oct 2023 29 Oct, 2023
Pelvic Organ Prolapse after menopause 5.6 X more likely if low Vitamin D (weak muscles) – Oct 2023 02 Oct, 2023
Muscles improved in women with 50,000 IU vitamin D weekly (8 weeks) plus daily Magnesium – RCT Sept 2020 16 Sep, 2023
Muscle pain in obese women reduced by aerobic exercise plus 50,000 IU Vitamin D - RCT May 2021 27 Aug, 2023
Sarcopenia (muscle loss) is reduced by vitamin D and many other supplements - July 2023 27 Aug, 2023
Vitamin D Receptors in muscles decrease with age in those with Osteoporosis - 2018 20 Aug, 2023
Sarcopenia (muscle loss) fought by Vitamin D, exercise and protein - many studies 11 Jul, 2023
Some excess calories diverted to muscle growth if high level vitamin D (exercising mice) – preprint May 2022 02 Jun, 2023
Muscular Dystrophy probably treated by high-dose Vitamin D plus muscle rehab 23 Mar, 2023
Off topic: back muscle pain quickly treated by TENS - Jan 2023 25 Jan, 2023
More muscle strength 80 years after being born in warm season (no surprise) – Nov 2022 26 Nov, 2022
Grip strength of children not improved by 800 IU Vitamin D daily (not nearly enough) – RCT Feb 2018 31 Oct, 2022
Exercise-induced muscle damage fought when enough vitamin D used for long enough – review Sept 2022 24 Sep, 2022
Frailty and low muscle mass both associated with low vitamin D – Aug 2013 14 Sep, 2022
Statin muscle problems decreased in 4 out of 5 patients when vitamin D was added – June 2022 30 Jun, 2022
Omega-3 improves elderly muscles – 2 meta-analyses 06 Jun, 2022
High-Dose Vitamin D puts surplus calories into muscles instead of fat (mice) – May 2022 20 May, 2022
3X less muscle atrophy after ACL surgery if more than 40 ng of vitamin D – May 2022 14 May, 2022
Better handgrip strength if some good vitamin D genes (or if supplement) – April 2022 09 Apr, 2022
Handgrip strength increased 9 percent in college athletes with 8 weeks of Omega-3 – RCT Feb 2022 18 Mar, 2022
Muscle Strength improved 1.4 to 19 percent by vitamin D3 (not D2) – systematic review June 2016 13 Feb, 2022
Role of Vitamin K in Bones and Muscles - Feb 2022 13 Feb, 2022
Some vitamin D is stored in skeletal muscles – multiple studies 27 Dec, 2021
Severe sarcopenia (loss of muscle) 6 X more likely in women with rheumatoid arthritis having low vitamin D – Oct 2021 16 Oct, 2021
Loss of muscle strength –sarcopenia – one of the suspects is vitamin D – Aug 2012 16 Oct, 2021
Less muscle inflammation after exercise if high level of Vitamin D (50 ng) -July 2021 08 Jul, 2021
Low muscle strength predicts low vitamin D level in elderly – March 2021 06 May, 2021
Adding just a little vitamin D does not help (muscle mass in this case) – meta-analysis Jan 2021 06 Feb, 2021
Low muscle mass at least 2X more likely if low Vitamin D (Korea, all ages) – Dec 2020 04 Jan, 2021
4,000 IU of vitamin D for 1 month does not help (muscles in this case) – RCT Jan 2020 21 Sep, 2020
Sarcopenia (muscle loss) is 1.6X more likely if poor Vitamin D receptor – July 2020 23 Jul, 2020
Less muscle loss associated with eating more fish (Omega-3, Vitamin D, Magnesium, etc) – Jan 2020 30 Jan, 2020
2X less muscle soreness after exercise if Omega-3 index higher than 4 – RCT 2014 23 Dec, 2019
Muscles not improved by just Vitamin D weekly (also need exercise) – Dec 2019 17 Dec, 2019
Low vitamin D resulted in reduced genes to make muscles (in rats) – Nov 2019 11 Nov, 2019
Active muscles store vitamin D in the winter - Oct 2019 11 Oct, 2019
Omega-3 helps muscles – Aug 2019 24 Aug, 2019
Muscles of senior women not helped by just vitamin D (also need exercise) – Aug 2019 10 Aug, 2019
8 Signs of Low Vitamin D - sweating, bones ache, muscle pain, poor immune, fatigue, slow healing etc. – YouTube Dec 2018 05 Aug, 2019
Vitamin D stored in muscle via Vitamin D Binding Protein – July 2019 30 Jul, 2019
Mechanisms of vitamin D action in skeletal muscle – June 2019 22 Jun, 2019
Grip strength following wrist fracture increased by 50,000 IU Vitamin D monthly – May 2019 09 May, 2019
Vitamin D supplementation increases strength of lower muscles – Meta-analysis April 2019 01 May, 2019
Vitamin D does not help gain muscle mass (when only use small doses) – March 2019 03 Mar, 2019
Muscle loss (sarcopenia) may be both prevented and treated by Omega-3 – Feb 2019 23 Feb, 2019
Calcium supplements go to muscle, not bone, unless have enough Vitamin K – Feb 2019 12 Feb, 2019
Protein aids muscle gain – meta-analysis March 2018 02 Jan, 2019
Vitamin D and muscle – April 2019 07 Dec, 2018
Exercise plus vitamin D increases elderly muscles (Nordic walking in this case) – RCT Sept 2018 14 Sep, 2018
Postmenopausal women need Vitamin D, protein and exercise to prevent loss of muscle and bone – Aug 2018 21 Aug, 2018
Dietary Protein, Muscle and Physical Function in the Very Old – July 2018 17 Aug, 2018
Disability was 1.9 X more likely if weak muscles and low vitamin D two years before – Aug 2018 06 Aug, 2018
Muscle fatigue 4X less likely in rugby players getting Omega-3 and protein – July 2018 14 Jul, 2018
Seniors can restore lost muscle (Sarcopenia) – first restore vitamin D, then exercise – July 2018 13 Jul, 2018
Muscle problems are both treated and avoided by Vitamin D – April 2018 03 Jul, 2018
Seniors getting Vitamin D (but no exercise) for 3 months failed to increase muscle strength – RCT June 2018 03 Jul, 2018
Muscle, etc. problems if consume little vitamin D (mice) – June 2018 27 Jun, 2018
Poor handgrip strength in 5-year-old girls 3X more likely if low vitamin D – May 2018 24 May, 2018
Vitamin D weekly supplementation (Spinal Cord Injury athletes) increased handgrip strength – May 2018 15 May, 2018
Muscle pain (Low Magnesium) plus Low Vitamin D associated with 10X more Cancer, etc (San Francisco) – Aug 2017 13 Apr, 2018
Widespread pain, arthritis pain and muscle pain are associated with low vitamin D – meta-analysis March 2018 08 Apr, 2018
Fewer Breast Cancer deaths if more muscle (probably due to less fat, more Vitamin D) – April 2018 07 Apr, 2018
Omega-3 helps muscles and reduces inflammation, lipids, and insulin – Nov 2015 03 Mar, 2018
Osteoporosis and low grip strength both associated with low vitamin D – Feb 2018 13 Feb, 2018
Headaches (chronic tension) 3X more likely to have low vitamin D – also muscle weakness and bone tenderness – May 2017 25 Jan, 2018
Weaker hand grip if poor Vitamin D Receptor (15 percent) – Nov 2016 12 Nov, 2017
Seniors gained 0.3 kg of muscle in 6 weeks with 800 IU and Leucine protein – Aug 2017 29 Aug, 2017
Vitamin D improves muscle strength, reduces falling, and reduces frailty – review March 2015 27 Jul, 2017
Muscle strength not increased by Vitamin D - 96 percent were not deficient – RCT April 2017 20 Jul, 2017
Infant muscle development best with 400 IU of vitamin D (not 800) – Sept 2015 13 Jul, 2017
Fast twitch muscles increased by Vitamin D in athletes and seniors (reduce falling) – Oct 2016 08 Jun, 2017
Muscle strength not increased by Vitamin D when 96 percent already had enough – RCT April 2017 30 Apr, 2017
Muscle strength of senior women increased 25 percent with vitamin D, decreased 6 percent with placebo – Oct 2016 08 Mar, 2017
More fast twitch muscles (IIA) are associated with higher levels of Vitamin D – Feb 2017 02 Mar, 2017
Handgrip strength dropped by 20 percent in the last generation (perhaps due to lower vitamin D) - Feb 2017 02 Mar, 2017
Severely burned children recovered muscle capability much faster with daily 1000 IU of vitamin D – RCT March 2017 01 Mar, 2017
Hypothesis: Less severe muscle damage if vitamin D level had been normalized – July 2013 21 Feb, 2017
Large single-dose of Omega-3 reduced expected muscle damage – Feb 2017 21 Feb, 2017
Added 1 lb of muscle to sarcopenia adults in 13 weeks with just 800 IU vitamin D and protein – RCT Jan 2017 31 Jan, 2017
Sarcopenic added 1 lb of muscle in 13 weeks with just 800 IU vitamin D and protein – RCT Jan 2017 31 Jan, 2017
Osteosarcopenic obesity (obese with low bone and muscle mass) twice as likely if low vitamin D – Oct 2016 31 Jan, 2017
More muscle torque associated with higher vitamin D – Jan 2017 05 Jan, 2017
Vitamin D increased muscle strength by 1% to 19% (varied with dose and duration) – review June 2016 22 Nov, 2016
Vitamin D increased muscle strength by 1 to 19 percent – review June 2016 22 Nov, 2016
Vitamin D increasing muscle strength may reduce knee pain – Feb 2016 22 Nov, 2016
Myotonic dystrophy a (rare genetic muscle problem) associated with low vitamin D – Nov 2016 18 Nov, 2016
Myotonic dystrophy (a rare genetic muscle problem) associated with low vitamin D – Nov 2016 18 Nov, 2016
Muscle strength is associated with vitamin D receptor gene variants – March 2016 12 Nov, 2016
Improved muscle function in postmenopausal women with just 1,000 IU of vitamin D daily – RCT May 2015 31 Oct, 2016
Vitamin D supplementation improves muscle strength in healthy adults – meta-analysis of 6 RCT Aug 2014 31 Oct, 2016
Vitamin D improved child muscle mass even without varying dose with weight – RCT Feb 2016 06 May, 2016
Less muscle and insulin resistance for children of vitamin D deficient mothers – Jan 2011 05 May, 2016
Sunshine is a cure for “weak and soft muscles” – 425 BC 22 Apr, 2016
Senior muscles increased somewhat with Omega-3 – RCT July 2015 18 Jan, 2016
Muscle strength of Judo athletes increased 13 percent following single dose of 150,000 IU vitamin D – RCT Nov 2015 05 Nov, 2015
More muscle response when have adequate vitamin D 27 Jul, 2015
Pelvic floor muscle strength is low after giving birth if vitamin D deficient – March 2015 20 Mar, 2015
Weight loss includes muscle loss unless add vitamin D, whey and leucine – RCT Feb 2015 07 Feb, 2015
Elderly lost extra half pound of leg and arm muscle mass if low vitamin D (6 years) – Oct 2014 27 Jan, 2015
Vitamin D and bicarbonate perhaps synergistically reduce muscle loss – June 2013 27 Jan, 2015
Muscle increased 17 percent in vitamin D insufficient elderly getting 4,000 IU for 4 months – RCT Oct 2013 27 Jan, 2015
Low Vitamin D breaks down muscle by interferring with protein - Editorial Nov 2013 27 Jan, 2015
People with old burns improved muscle strength with 2200 IU average vitamin D – RCT Sept 2014 20 Dec, 2014
Vitamin D supplementation help muscles of seniors who are vitamin D deficient – meta-analysis July 2014 18 Jul, 2014
Muscle fatigue reduced with 10,000 IU of vitamin D – March 2013 05 May, 2014
MRI of elderly skeletal muscle lacking vitamin D – April 2014 30 Apr, 2014
Muscle cells differentiate into fat cells if there is low vitamin D in petrie dish – April 2013 30 Apr, 2014
Skeletal muscles helped by vitamin D – Review Feb 2014 08 Feb, 2014
Higher vitamin D during pregnancy associated with stronger hand grip at age 4 – Oct 2013 03 Jan, 2014
Elderly lower limb muscle strength improved with Vitamin D supplementation - Meta-analysis Oct 2013 23 Dec, 2013
Vitamin D improves muscle strength if deficient – meta-analysis - Oct 2010 19 Dec, 2013
Muscle strength not increased by raising vitamin D to only 30 ng – RCT Aug 2012 19 Dec, 2013
Vitamin D provides faster recovery after muscle overuse – April 2013 18 Dec, 2013
Type 2 muscles, not all muscles, get benefit from Vitamin D - Dec 2012 23 Oct, 2013
Evidence that vitamin D is also stored in muscle cells – Sept 2013 26 Sep, 2013
Muscle strength in youth increased with 60,000 IU vitamin D per week and 1 g Calcium – April 2010 10 Aug, 2013
Hypothesis: Low vitamin D is one of the causes of muscle weakness in alcoholics – Dec 2012 31 Jul, 2013
More muscle injuries in NFL players who were low on vitamin D – July 2011 13 Jul, 2013
Muscle inflammation 17X more probable if vitamin D deficient – Feb 2013 13 Jul, 2013
Muscle improved by increasing vitamin D if previously less than 24 ng – June 2013 02 Jul, 2013
Most immigrant women in Sweden had little vitamin D and lots of muscle pain – May 2013 22 May, 2013
Deadly amount of vitamin D speeds up recovery of crushed muscles in rats – Dec 2012 19 Apr, 2013
Relevance of Vitamin D in Bone and Muscle Health of Cancer Patients - Jan 2013 06 Dec, 2012
Vitamin D2 intervention increased elderly muscle strength – Nov 2010 10 Nov, 2012
Higher vitamin D helps regain muscle strength after knee surgery – July 2011 01 Sep, 2011
Meta-analysis of RCT – vitamin D might increase senior muscle function – Sept 2010 14 Sep, 2010
Skeletal Muscle weakness from lack of vitamin D fixed by adding Calcium and phosphorus – Aug 2010 11 Aug, 2010
Vitamin D, Muscle Function, and Exercise Performance in kids – June 2010 09 Jun, 2010
Vitamin D improving muscles may be due to improving phosphate levels – June 2010 03 Jun, 2010
Vit D associated with less muscle fat 11 Apr, 2010
Reduced muscle function in mice lacking Vitamin D Receptors in muscles – June 2019 No value for 'modification_date_major'
Created by admin. Last Modification: Thursday February 29, 2024 16:50:47 GMT-0000 by admin. (Version 16)
Some vitamin D is stored in skeletal muscles – multiple studies        
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