Abrasions
Abscess
Acanthosis nigricans
Acne
Acne rosacea
Adenoiditis
Adenoma
Adenomyosis
ADHD
Adrenal gland disorder
Allergies
Alzheimer
Anemia
Angina
Anorexia nervosa
Anxiety
Arteriosclerosis
Arthritis
Asbestosis
Asthma
athlete foot
Atrial fibrillation
Atrial flutter
Atrial septal defect
Attention deficit hyperactivity disorder
Autism
Autoimmune disorder
Back pain
Bacterial infection
Benign prostatic hyperplasia
Benign tumor
bipolar disorder
Bloating
Blood clot
Blurred Vision
Bone pain
Brain tumor
Breast Cancer
Bronchitis
Bruise
bruising
Bulimia
Cancer
Candidiasis
Cardiovascular disease
Carpal tunnel syndrome
Cataract
Celiac
Cerebral palsy
Cervical cancer
Chalazion
Chemotherapy
Chest pain
Chickenpox
Cholecystitis
Chondromalacia patella
Chronic Cough
Chronic fatigue syndrome
Chronic obstructive pulmonary disease
Cold
Cold Sores
Colitis
Common Cold
Conjunctivitis
Constipation
Corns
Cough
Crohn
Cystic Fibrosis
Depression
Diabetes
Diarrhea
diarrhoea
Diverticulitis
Dizziness
Ear infection
eczema
Endometriosis
Epilepsy
Erectile dysfunction
Eye infection
Fibromyalgia
Floaters
Flu
Food Poisoning
Frozen shoulder
Gastritis
Gastroenteritis
Gastroesophageal reflux disease
Genital herpes
Gout
Hair loss
hair removal
Hashimoto
Headache
Heart attack
Heart Disease
Heartburn
Hemorrhoids
Hepatitis
Herpes
High Cholesterol
Hives
Hot flashes
Hypertension
hyperthyroidism
hypothyroidism
indigestion
Influenza
Insomnia
Irritable bowel syndrome
jetlag
Kidney infection
Kidney stones
Knee Pain
Laryngitis
Leg cramps
Leukemia
Liver disease
low libido
Lung cancer
Lupus
Measles
Menopause
Migraine
Mild Cognitive Impairment
Multiple sclerosis
muscle building
muscle pain
nausea
Neuropathy
Obesity
osteoarthritis
Osteoporosis
Ovarian cancer
Pancreatitis
Parkinson
Pelvic Pain
Pneumonia
Polycystic ovary syndrome
Premenstrual Syndrome
Prostate cancer
Psoriasis
Rash
Reflux
Rheumatoid arthritis
Ringworm
Salmonella
Sciatica
Shingles
Sinusitis
Skin cancer
Sleep apnea
Sore throat
Stroke
Swollen Lymph Nodes
Tendonitis
Thrush
tinnitus
Tonsillitis
Toothache
Tuberculosis
Ulcer
Urinary tract infection
Uterine Fibroids
Vertigo
Warts
weight loss
Whooping cough
Yeast infection

<li class="lp-wrap-cats" data-catid="1162">Abrasions</li><li class="lp-wrap-cats" data-catid="1163">Abscess</li><li class="lp-wrap-cats" data-catid="1164">Acanthosis nigricans</li><li class="lp-wrap-cats" data-catid="1063">Acne</li><li class="lp-wrap-cats" data-catid="1165">Acne rosacea</li><li class="lp-wrap-cats" data-catid="1167">Adenoiditis</li><li class="lp-wrap-cats" data-catid="1168">Adenoma</li><li class="lp-wrap-cats" data-catid="1460">Adenomyosis</li><li class="lp-wrap-cats" data-catid="1469">ADHD</li><li class="lp-wrap-cats" data-catid="1169">Adrenal gland disorder</li><li class="lp-wrap-cats" data-catid="1064">Allergies</li><li class="lp-wrap-cats" data-catid="1207">Alzheimer</li><li class="lp-wrap-cats" data-catid="1066">Anemia</li><li class="lp-wrap-cats" data-catid="1067">Angina</li><li class="lp-wrap-cats" data-catid="1482">Anorexia nervosa</li><li class="lp-wrap-cats" data-catid="1068">Anxiety</li><li class="lp-wrap-cats" data-catid="1173">Arteriosclerosis</li><li class="lp-wrap-cats" data-catid="1069">Arthritis</li><li class="lp-wrap-cats" data-catid="1174">Asbestosis</li><li class="lp-wrap-cats" data-catid="1070">Asthma</li><li class="lp-wrap-cats" data-catid="1475">athlete foot</li><li class="lp-wrap-cats" data-catid="1211">Atrial fibrillation</li><li class="lp-wrap-cats" data-catid="1176">Atrial flutter</li><li class="lp-wrap-cats" data-catid="1177">Atrial septal defect</li><li class="lp-wrap-cats" data-catid="1178">Attention deficit hyperactivity disorder</li><li class="lp-wrap-cats" data-catid="1179">Autism</li><li class="lp-wrap-cats" data-catid="1180">Autoimmune disorder</li><li class="lp-wrap-cats" data-catid="1072">Back pain</li><li class="lp-wrap-cats" data-catid="1073">Bacterial infection</li><li class="lp-wrap-cats" data-catid="1183">Benign prostatic hyperplasia</li><li class="lp-wrap-cats" data-catid="1182">Benign tumor</li><li class="lp-wrap-cats" data-catid="1481">bipolar disorder</li><li class="lp-wrap-cats" data-catid="1421">Bloating</li><li class="lp-wrap-cats" data-catid="1185">Blood clot</li><li class="lp-wrap-cats" data-catid="1457">Blurred Vision</li><li class="lp-wrap-cats" data-catid="1225">Bone pain</li><li class="lp-wrap-cats" data-catid="1188">Brain tumor</li><li class="lp-wrap-cats" data-catid="1209">Breast Cancer</li><li class="lp-wrap-cats" data-catid="1074">Bronchitis</li><li class="lp-wrap-cats" data-catid="1189">Bruise</li><li class="lp-wrap-cats" data-catid="1477">bruising</li><li class="lp-wrap-cats" data-catid="1190">Bulimia</li><li class="lp-wrap-cats" data-catid="1075">Cancer</li><li class="lp-wrap-cats" data-catid="1076">Candidiasis</li><li class="lp-wrap-cats" data-catid="1077">Cardiovascular disease</li><li class="lp-wrap-cats" data-catid="1194">Carpal tunnel syndrome</li><li class="lp-wrap-cats" data-catid="1195">Cataract</li><li class="lp-wrap-cats" data-catid="1462">Celiac</li><li class="lp-wrap-cats" data-catid="1197">Cerebral palsy</li><li class="lp-wrap-cats" data-catid="1198">Cervical cancer</li><li class="lp-wrap-cats" data-catid="1199">Chalazion</li><li class="lp-wrap-cats" data-catid="1216">Chemotherapy</li><li class="lp-wrap-cats" data-catid="1200">Chest pain</li><li class="lp-wrap-cats" data-catid="1078">Chickenpox</li><li class="lp-wrap-cats" data-catid="1203">Cholecystitis</li><li class="lp-wrap-cats" data-catid="1204">Chondromalacia patella</li><li class="lp-wrap-cats" data-catid="1454">Chronic Cough</li><li class="lp-wrap-cats" data-catid="1205">Chronic fatigue syndrome</li><li class="lp-wrap-cats" data-catid="1206">Chronic obstructive pulmonary disease</li><li class="lp-wrap-cats" data-catid="1080">Cold</li><li class="lp-wrap-cats" data-catid="1448">Cold Sores</li><li class="lp-wrap-cats" data-catid="1081">Colitis</li><li class="lp-wrap-cats" data-catid="1437">Common Cold</li><li class="lp-wrap-cats" data-catid="1082">Conjunctivitis</li><li class="lp-wrap-cats" data-catid="1083">Constipation</li><li class="lp-wrap-cats" data-catid="1473">Corns</li><li class="lp-wrap-cats" data-catid="1084">Cough</li><li class="lp-wrap-cats" data-catid="1465">Crohn</li><li class="lp-wrap-cats" data-catid="1472">Cystic Fibrosis</li><li class="lp-wrap-cats" data-catid="1438">Depression</li><li class="lp-wrap-cats" data-catid="1085">Diabetes</li><li class="lp-wrap-cats" data-catid="1086">Diarrhea</li><li class="lp-wrap-cats" data-catid="1224">diarrhoea</li><li class="lp-wrap-cats" data-catid="1087">Diverticulitis</li><li class="lp-wrap-cats" data-catid="1088">Dizziness</li><li class="lp-wrap-cats" data-catid="1214">Ear infection</li><li class="lp-wrap-cats" data-catid="1420">eczema</li><li class="lp-wrap-cats" data-catid="1458">Endometriosis</li><li class="lp-wrap-cats" data-catid="1089">Epilepsy</li><li class="lp-wrap-cats" data-catid="1090">Erectile dysfunction</li><li class="lp-wrap-cats" data-catid="1091">Eye infection</li><li class="lp-wrap-cats" data-catid="1445">Fibromyalgia</li><li class="lp-wrap-cats" data-catid="1451">Floaters</li><li class="lp-wrap-cats" data-catid="1092">Flu</li><li class="lp-wrap-cats" data-catid="1449">Food Poisoning</li><li class="lp-wrap-cats" data-catid="1213">Frozen shoulder</li><li class="lp-wrap-cats" data-catid="1444">Gastritis</li><li class="lp-wrap-cats" data-catid="1093">Gastroenteritis</li><li class="lp-wrap-cats" data-catid="1094">Gastroesophageal reflux disease</li><li class="lp-wrap-cats" data-catid="1095">Genital herpes</li><li class="lp-wrap-cats" data-catid="1097">Gout</li><li class="lp-wrap-cats" data-catid="1212">Hair loss</li><li class="lp-wrap-cats" data-catid="1483">hair removal</li><li class="lp-wrap-cats" data-catid="1439">Hashimoto</li><li class="lp-wrap-cats" data-catid="1098">Headache</li><li class="lp-wrap-cats" data-catid="1099">Heart attack</li><li class="lp-wrap-cats" data-catid="1441">Heart Disease</li><li class="lp-wrap-cats" data-catid="1227">Heartburn</li><li class="lp-wrap-cats" data-catid="1101">Hemorrhoids</li><li class="lp-wrap-cats" data-catid="1102">Hepatitis</li><li class="lp-wrap-cats" data-catid="1103">Herpes</li><li class="lp-wrap-cats" data-catid="1442">High Cholesterol</li><li class="lp-wrap-cats" data-catid="1104">Hives</li><li class="lp-wrap-cats" data-catid="1229">Hot flashes</li><li class="lp-wrap-cats" data-catid="1105">Hypertension</li><li class="lp-wrap-cats" data-catid="1231">hyperthyroidism</li><li class="lp-wrap-cats" data-catid="1230">hypothyroidism</li><li class="lp-wrap-cats" data-catid="1221">indigestion</li><li class="lp-wrap-cats" data-catid="1106">Influenza</li><li class="lp-wrap-cats" data-catid="1107">Insomnia</li><li class="lp-wrap-cats" data-catid="1108">Irritable bowel syndrome</li><li class="lp-wrap-cats" data-catid="1476">jetlag</li><li class="lp-wrap-cats" data-catid="1109">Kidney infection</li><li class="lp-wrap-cats" data-catid="1110">Kidney stones</li><li class="lp-wrap-cats" data-catid="1440">Knee Pain</li><li class="lp-wrap-cats" data-catid="1111">Laryngitis</li><li class="lp-wrap-cats" data-catid="1112">Leg cramps</li><li class="lp-wrap-cats" data-catid="1113">Leukemia</li><li class="lp-wrap-cats" data-catid="1114">Liver disease</li><li class="lp-wrap-cats" data-catid="1468">low libido</li><li class="lp-wrap-cats" data-catid="1115">Lung cancer</li><li class="lp-wrap-cats" data-catid="1464">Lupus</li><li class="lp-wrap-cats" data-catid="1117">Measles</li><li class="lp-wrap-cats" data-catid="1118">Menopause</li><li class="lp-wrap-cats" data-catid="1119">Migraine</li><li class="lp-wrap-cats" data-catid="1471">Mild Cognitive Impairment</li><li class="lp-wrap-cats" data-catid="1121">Multiple sclerosis</li><li class="lp-wrap-cats" data-catid="1480">muscle building</li><li class="lp-wrap-cats" data-catid="1484">muscle pain</li><li class="lp-wrap-cats" data-catid="1220">nausea</li><li class="lp-wrap-cats" data-catid="1215">Neuropathy</li><li class="lp-wrap-cats" data-catid="1443">Obesity</li><li class="lp-wrap-cats" data-catid="1474">osteoarthritis</li><li class="lp-wrap-cats" data-catid="1123">Osteoporosis</li><li class="lp-wrap-cats" data-catid="1122">Ovarian cancer</li><li class="lp-wrap-cats" data-catid="1124">Pancreatitis</li><li class="lp-wrap-cats" data-catid="1463">Parkinson</li><li class="lp-wrap-cats" data-catid="1455">Pelvic Pain</li><li class="lp-wrap-cats" data-catid="1126">Pneumonia</li><li class="lp-wrap-cats" data-catid="1128">Polycystic ovary syndrome</li><li class="lp-wrap-cats" data-catid="1478">Premenstrual Syndrome</li><li class="lp-wrap-cats" data-catid="1129">Prostate cancer</li><li class="lp-wrap-cats" data-catid="1130">Psoriasis</li><li class="lp-wrap-cats" data-catid="1452">Rash</li><li class="lp-wrap-cats" data-catid="1132">Reflux</li><li class="lp-wrap-cats" data-catid="1133">Rheumatoid arthritis</li><li class="lp-wrap-cats" data-catid="1134">Ringworm</li><li class="lp-wrap-cats" data-catid="1136">Salmonella</li><li class="lp-wrap-cats" data-catid="1447">Sciatica</li><li class="lp-wrap-cats" data-catid="1139">Shingles</li><li class="lp-wrap-cats" data-catid="1140">Sinusitis</li><li class="lp-wrap-cats" data-catid="1141">Skin cancer</li><li class="lp-wrap-cats" data-catid="1142">Sleep apnea</li><li class="lp-wrap-cats" data-catid="1143">Sore throat</li><li class="lp-wrap-cats" data-catid="1145">Stroke</li><li class="lp-wrap-cats" data-catid="1456">Swollen Lymph Nodes</li><li class="lp-wrap-cats" data-catid="1446">Tendonitis</li><li class="lp-wrap-cats" data-catid="1148">Thrush</li><li class="lp-wrap-cats" data-catid="1226">tinnitus</li><li class="lp-wrap-cats" data-catid="1149">Tonsillitis</li><li class="lp-wrap-cats" data-catid="1150">Toothache</li><li class="lp-wrap-cats" data-catid="1151">Tuberculosis</li><li class="lp-wrap-cats" data-catid="1152">Ulcer</li><li class="lp-wrap-cats" data-catid="1153">Urinary tract infection</li><li class="lp-wrap-cats" data-catid="1459">Uterine Fibroids</li><li class="lp-wrap-cats" data-catid="1155">Vertigo</li><li class="lp-wrap-cats" data-catid="1156">Warts</li><li class="lp-wrap-cats" data-catid="1467">weight loss</li><li class="lp-wrap-cats" data-catid="1157">Whooping cough</li><li class="lp-wrap-cats" data-catid="1158">Yeast infection</li>

Can NOW Supplements Spirulina Help with Cold Sores?

Last update

7/6/2026

Overview

SCIENTIFIC SCORE

No researches found

N/A

USERS' SCORE

Good

Based on 1 Review

8.4

Supplement Facts

Serving Size: 3 Tablets

Amount Per Serving

%DV

Calories

Total Carbohydrate

<1 g

<1%*

Protein

2 g

Organic Spirulina (Arthrospira platensis)

3 g (3,000 mg)

†

* Daily Value not established.

📅 Last updated: March 20, 2026

Most Useful Reviews

7.5

Strengthened body

Spirulina is a solid choice, especially with a dosage of three tablets that are easier to swallow. It helps strengthen the body and provides protection against colds. I recommend it.

Most Recommended Products for Cold Sores

Life Extension Bio-Quercetin

SCIENTIFIC SCORE

Likely Very Effective

Based on 1 Research

9.5

USERS' SCORE

Good

Based on 12 Reviews

8.2

NOW Foods Iron

SCIENTIFIC SCORE

Likely Very Effective

Based on 1 Research

USERS' SCORE

Good

Based on 3 Reviews

8.4

Jarrow Formulas Curcumin 95

SCIENTIFIC SCORE

Likely Very Effective

Based on 1 Research

USERS' SCORE

Good

Based on 10 Reviews

8.2

Life Extension Vitamin C and Bio-Quercetin

SCIENTIFIC SCORE

Moderately Effective

Based on 3 Researches

8.3

USERS' SCORE

Good

Based on 6 Reviews

8.7

User Reviews

USERS' SCORE

Good

Based on 1 Review

8.4

All Reviews
Positive Reviews
Negative Reviews

7.5

Strengthened body

Spirulina is a solid choice, especially with a dosage of three tablets that are easier to swallow. It helps strengthen the body and provides protection against colds. I recommend it.

Frequently Asked Questions

Cold sores, also known as fever blisters, are small, fluid-filled blisters that typically appear on or around the lips, although they can also occur in other areas of the face. They are caused by the herpes simplex virus (HSV), primarily HSV-1, and are highly contagious. The initial outbreak may be accompanied by symptoms such as fever, swollen lymph nodes, and a general feeling of malaise. Once infected, the virus remains dormant in the body and can reactivate, leading to recurring outbreaks, often triggered by stress, illness, or exposure to sunlight.

Treatment options for cold sores often focus on alleviating symptoms and speeding up healing. Over-the-counter creams containing antiviral medication like docosanol can help reduce the duration of an outbreak when applied early on. Prescription medications may be recommended for more severe cases. Home remedies, such as applying ice, using aloe vera, or taking lysine supplements, may also offer some relief. Prevention strategies include avoiding known triggers and practicing good hygiene, like not sharing utensils or personal items with infected individuals.

Spirulina is a blue-green algae, or cyanobacteria, that is often touted as a superfood due to its high nutrient profile. It is packed with proteins, vitamins, minerals, and antioxidants, making it a popular dietary supplement for health enthusiasts. Spirulina is known for its vibrant green color and is commonly sold in powder form, tablets, or capsules. Many people incorporate it into smoothies, juices, or energy bars as a way to enhance their nutrient intake conveniently.

Rich in protein—about 60-70% by weight—spirulina is also a good source of essential vitamins such as B12, which is crucial for vegetarians and vegans. In addition, it contains antioxidants like phycocyanin, which may have anti-inflammatory properties. However, while its health benefits are supported by some research, it is important for consumers to choose high-quality spirulina from reputable sources to ensure purity and avoid contamination. Overall, spirulina can be a beneficial addition to a balanced diet, though individuals should consider their specific nutritional needs and consult with healthcare professionals if they have concerns.

Based on user reviews, individuals seeking relief from cold sores typically start noticing positive effects within a few weeks of taking Spirulina. One user mentioned that after three weeks of consistent use, they experienced significant improvements in their health and energy levels, suggesting a timeline for onset of benefits Read Review. Additionally, another reviewer has noted that after starting Spirulina, they have not suffered from cold sores or recurrent colds since, indicating its effectiveness in their experience Read Review.

Based on user reviews, many individuals report significant improvements in their overall health and a marked decrease in the frequency of colds and cold sores after incorporating Spirulina into their routines. One user specifically mentioned that since they began taking Spirulina, they have not suffered from recurrent colds or sore throats, which they described as "truly exceptional" Read Review. Another reviewer noted that after three weeks of consistent use, not only did their health improve, but colds became a thing of the past, highlighting the positive impact Spirulina can have on the immune system Read Review.

Additionally, users appreciate Spirulina's preventive effects, with one reviewer stating that during the cold season, they found it helpful in warding off illnesses Read Review. Overall, while experiences can vary among individuals, the consensus indicates that Spirulina can effectively enhance health and provide reliable protection against common ailments like colds and cold sores.

Users have reported positive experiences when combining Spirulina with other supplements for handling cold sores and improving overall health. One user mentioned that after three weeks of taking Spirulina, they followed up with Chlorella, which contributed to improved energy and health, leading to a complete absence of colds during that time Read Review. This suggests that pairing Spirulina with other supplements can be beneficial in enhancing the immune response, thus reducing the incidence of cold sores.

Additionally, users have emphasized Spirulina's effectiveness on its own, with one reviewer noting that this organic Spirulina product has been particularly effective for preventing cold sores due to its rich B vitamin content Read Review. Overall, while specific combinations may vary, the consensus reflects that users find enhancements in their immune function and reduced occurrences of cold-related ailments when integrating Spirulina with other supplements.

Users report varying experiences with Spirulina, particularly when it comes to its effectiveness in treating cold sores and preventing colds. One reviewer mentioned that Spirulina is particularly effective for preventing cold sores and suggested that the right dosage should be considered, specifically referring to a quality product with organic Spirulina Read Review. Another user emphasized taking Spirulina consistently over three weeks, followed by breaks with Chlorella, which contributed to an overall improvement in health and energy levels, ultimately reducing the frequency of colds altogether Read Review.

Additionally, some reviews indicated that a dosage of three tablets is suggested for easier consumption and effective results in bolstering the immune system against colds Read Review. While users overwhelmingly express positive outcomes from Spirulina relating to cold prevention, specific dosage recommendations vary, and further clarity on the optimal dosage for treating cold sores could not be conclusively determined from the reviews.

7.5

Strengthened body

Spirulina is a solid choice, especially with a dosage of three tablets that are easier to swallow. It helps strengthen the body and provides protection against colds. I recommend it.

As an Amazon Associate, I may earn from qualifying purchases made through the links on this site