From Life Extension Foundation:

>>Some supplements that can be beneficial to MD patients are:

Coenzyme Q10, one 100-mg oil-filled capsule 3 times a day.
Vitamin E (alpha tocopherol), 400 IU 3 times a day. Gamma E tocopherol in a dose of about 400 mg a day
should be taken to balance out the relatively high dose of alpha tocopherol vitamin E.
Selenium, 200 mcg daily.
Vitamin B12, 5 mg-30 mg a day of the methylcobalamin form of vitamin B12.
Creatine, 10 grams daily for adults; 5 grams daily for children.
Vitamin B6, 100-250 mg a day.
Folic acid, 800 mcg daily.
S-adenosylmethionine (SAMe), 800 mg a day.
Trimethylglycine (TMG), 500-2000 mg a day. <<

From healthandage.com:

>>Nutrition

Follow an anti-inflammatory diet, including organic whole foods such as whole grains, vegetables, fruit, legumes, sea vegetables, and essential fatty acids (nuts, seeds, and cold-water fish). Avoid refined foods, saturated fats (dairy and other animal products), and all known food allergens.

Potentially beneficial nutrient supplements include the following.

Essential fatty acids (for example, flax, borage, evening primrose, cod liver) 1,000 to 1,500 mg two to three times per day
Vitamin E (400 to 800 IU per day), selenium (100 to 200 mcg per day), coenzyme Q10 (100 mg one to three times per day)
L-carnitine (320 mg one to two times per day)
B-complex vitamins, especially B12 (1,000 mcg per day) and B6 (100 mg per day), and minerals, such as calcium (1,000 mg per day), magnesium (500 mg per day), and potassium (100 mg per day)
N-acetyl cysteine (500 mg twice a day)
Creatine (5 to 7 g per day)


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Herbs

Herbal remedies may offer relief from symptoms. Herbs are generally available as dried extracts (pills, capsules, or tablets), teas, or tinctures (alcohol extraction, unless otherwise noted). Dose for teas is 1 heaping tsp. per cup of water steeped for 10 minutes (roots need 20 minutes).

Combine three of the following herbs in equal parts and add two to three others as needed:

Mineral-rich herbs: horsetail (Equisetum arvense), nettles (Urtica dioica), oatstraw (Avena sativa), and kelp (Laminaria cloustonii)
With spasm, add black cohosh (Cimicifuga racemosa), cramp bark (Viburnum opulus)
With muscle pain, add Jamaica dogwood (Piscidia erythrina), meadowsweet (Filipendula ulmaria)
If the heart is affected, add hawthorn (Crataegus monogyna), rosemary (Rosemarinus officinalis)


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Homeopathy

There have been few studies examining the effectiveness of specific homeopathic remedies. A professional homeopath, however, may recommend one or more of the following treatments for muscular dystrophy based on his or her knowledge and clinical experience. Before prescribing a remedy, homeopaths take into account a person's constitutional type. In homeopathic terms, a person's constitution is his or her physical, emotional, and intellectual makeup. An experienced homeopath assesses all of these factors when determining the most appropriate remedy for a particular individual.

Arnica — for relief from muscle pain or spasm
Calcarea carbonica — for cramps of the lower extremities, particularly in those who are overweight and easily chilled
Magnesia phos — for muscle pain and spasm with cramps and severe, shooting pain


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Massage

Regular massage is important for reducing spasm and muscle contractions.<<