Olive Leaf

9.5
No flu symptoms
Most Useful Review
I have been using Olive Leaf Extract for over a year, initially recommended by my naturopathic doctor for treating cold sores. I travel to India for mission trips and did not get sick during my recent five-week trip. I take one tablet in the morning and one at night. I also use it at the first sign of a cold, which subsides within a couple of days. Since taking Olive Leaf, I haven't had flu symptoms for a year, despite not receiving a flu jab.
9.5
Virus protection
Most Useful Review
My family and I have taken Olive Leaf regularly, and it has kept cold sores at bay. Its antiviral properties are remarkable, and I've noticed less pain in my legs and improved overall health. It also helps in reducing blood pressure.

Multivitamins

9.5
Improved immunity
Most Useful Review
Salvation during the cold season! I chose this vitamin C based on reviews, using it for rapid recovery during colds and for better iron absorption. The capsules are small and easy to swallow. If I notice any symptoms, I take two immediately. It significantly aids in preventing sickness and is gentle on the stomach due to the Ester-C technology. I will definitely order again.
9.5
Excellent immune formula
Most Useful Review
Repeat purchase. An excellent immune formula that I have bought twice already. It helped me at the first sign of a cold. As soon as my throat started to hurt, I took three capsules before bed and felt better by morning. It contains lysine, vitamin C, calcium, propolis, and echinacea extract.

Vitamin D3

9.5
Effective detox
Most Useful Review
I take 2000 IU of vitamin D for health and detox. I prefer supplements since I avoid sunbathing. Since I began taking this, I haven't been catching colds, and I'm feeling much better overall.
9.5
Immunity improvement
Most Useful Review
This product is fantastic! After a month of use, I noticed a significant boost in my mood and energy levels. My general health has improved dramatically, and I believe my immunity is much stronger, especially during this flu season. I’ll continue using it and have recommended it to my family and friends. The results are genuinely stunning!

Iron

9
Iron therapy reduces cold sore frequency
Response to replacement iron therapy in sideropenic individuals with recrudescent herpes labialis.
Most Relevant Research
We investigated how iron replacement therapy affects the occurrence of cold sores, also known as recurrent herpes labialis, in people with low iron levels, a condition known as sideropenia. In our study, ten patients with confirmed sideropenia and a history of cold sores took ferrous sulphate for three months.

Before starting the treatment, these individuals reported experiencing an average of 0.78 episodes of cold sores each month. After the iron therapy, this number significantly dropped to just 0.2 episodes monthly. Furthermore, we found that there was a noteworthy increase in serum ferritin levels, a marker indicative of iron status, after treatment.

The results suggest that iron therapy may play a significant role in reducing the frequency of cold sores for those affected by iron deficiency. These findings are intriguing and warrant further exploration into iron supplementation as a potential option for managing cold sores in individuals with low iron levels.
9.5
Improved iron levels
Most Useful Review
I administered this iron supplement with my daughter, and after four months, her ferritin rose from 7.5 to 34, which stabilised. Initially, she experienced intestinal issues, but after adjusting the dosage, everything was fine, and iron levels normalised. Previously, low ferritin resulted in frequent colds. Hemoglobin was 135, so I find this drug very effective!

Tumeric

9
Curcumin and blue light therapy
Photodynamic Therapy Mediated by Curcumin and Blue Light for Recurrent Herpes Labialis: A Case Report.
Most Relevant Research
We explored the effectiveness of photodynamic therapy (PDT) using curcumin and blue light for treating recurrent cold sores, specifically herpes labialis. This innovative treatment approach was assessed based on its ability to accelerate the healing of lesions and reduce their recurrence.

Our findings suggest that PDT shows promise as a safe and cost-effective option for managing this troublesome condition. However, it is important to note that the study was primarily focused on the combined effect of curcumin with PDT, making it difficult to determine the isolated benefits of curcumin on its own for cold sore treatment.

Overall, our research highlights an exciting potential pathway for alleviating the symptoms associated with recurring herpes labialis, paving the way for future studies to further investigate its components and their individual effects.
9.5
Treats cold sores
Most Useful Review
Curcumin is essential if you suffer from pain or inflammation. It's proven to be as effective as ibuprofen for symptoms like joint pain, headaches, and possibly even anxiety linked to inflammation. I double the dose when I sense a flu or cold approaching, which helps me recover quicker.

N Acetyl L Cysteine

9.5
Highly effective remedy
Most Useful Review
An excellent drug, particularly effective during colds and beyond.
9.5
Effective for symptoms
Most Useful Review
A precursor of glutathione, the main antioxidant in the body. I use it consistently at the first signs of any cold, and I’ve seen excellent results within 2-3 days. Family health has vastly improved. I highly recommend drinking it with Vitamin D, C, and zinc.

Probiotics

9.5
Partial clearing achieved
Most Useful Review
After using this probiotic for a month, my allergic child experienced partial clearing of her atopic dermatitis, as long as allergens were avoided. We had a persistent sore caused by a food allergy for over two years, with dermatologists’ treatments proving ineffective. Other pharmacy probiotics failed too. However, this probiotic truly works wonders! I'm grateful to the manufacturer for their quality product.
10
Prevents illness
Most Useful Review
This product is incredible! Since I started taking Primal Defence, I've not been ill—not even a cold!

Spirulina

9.5
Cold prevention
Most Useful Review
Spirulina greatly aids in fighting colds. I trust this brand for its quality and affordability. Other brands, such as Solgar, charge two to three times more. It’s important to consider the dosage and ingredients; this product has 100% organic Spirulina. It’s particularly effective for preventing cold sores and is rich in B vitamins. If my review is helpful, please give it a thumbs up!
9.5
Improved health
Most Useful Review
With an unbalanced diet, I turned to Spirulina for three weeks, followed by Chlorella, with breaks in between. Since then, my general health has improved, I've gained energy, and colds are now a thing of the past. I've tried other brands, but I find this one the most effective.

L Lysine

9.5
Herpes resolved
Most Useful Review
Excellent! My herpes is gone. After suffering from frequent cold sores, I now take lysine 1-3 times daily. I’m very happy with the results.
9.5
Miracle remedy
Most Useful Review
This amino acid is a miracle! I’ve had multiple colds and cold sores before, but since taking it, I feel energised and my well-being has improved greatly. I highly recommend it!

Selenium

9.5
Effective immune booster
Most Useful Review
The drug was prescribed for my thyroid function, and it has significantly improved my well-being. Selenium is an excellent antioxidant and a great remedy for immunity. With consistent use, I see remarkable improvement in my skin and overall health and a notable reduction in the risk of colds. I recommend it 100%.
8.3
Improved immune health
Most Useful Review
I took it after consulting my doctor to strengthen my immune system. Within a few weeks, I saw noticeable improvements in my overall health. It became easier to cope with colds, and unpleasant symptoms disappeared. I am very pleased with the result!

Vitamin C

8
Vitamin C shows potential for cold sores
A clinical pilot study of lignin--ascorbic acid combination treatment of herpes simplex virus.
Most Relevant Research
We conducted a clinical pilot study to evaluate the effects of a combination treatment of lignin—a substance derived from pine cones—mixed with vitamin C on cold sores caused by the herpes simplex virus type 1 (HSV-1). Our study included 48 healthy participants, ranging from 4 to 61 years old, who had active lesions of HSV-1.

Participants received a daily dose of the lignin-ascorbic acid treatment for one month. Notably, those who began the treatment within the first 48 hours after the onset of symptoms did not develop typical cold sore lesions. For others who started later, we observed a shorter duration of cold sores and less severe symptoms compared to their previous outbreaks.

Many participants reported a reduction in both the severity and frequency of their cold sore episodes during treatment. Although the results suggest some benefits of this combination treatment, it’s important to note that vitamin C was part of the blend, making it challenging to evaluate its individual effect on cold sores directly.

Thus, while the combination of lignin and vitamin C appears promising for preventing and treating HSV-1 infection, further studies isolating vitamin C's effects would be helpful to understand its specific role in managing cold sores.
10
Miraculous throat improvement
Most Useful Review
My children began to recover remarkably faster! Viruses have stopped affecting their throats! Thanks to elderberry, zinc, and vitamins C and D, I am thrilled with the results. I discarded all other immunity products from local pharmacies. This simple yet effective composition is all my family needed during cold season. When my throat starts to ache, I suck this delightful pill, which is pleasantly tangy. Elderberry is well-known for its medicinal benefits, and zinc with vitamin C is invaluable!

Cranberry

9.5
Prophylactic benefits
Most Useful Review
This is my magic remedy for cold sores during cold snaps. It is well tolerated even with a sensitive stomach and serves as a preventative measure. I also take it for colds!
9.5
Highly recommended
Most Useful Review
Cranberries are incredibly healthy, notably for alleviating cold sores, especially in the colder months. I'm satisfied and recommend purchasing them.

Oregano

9.5
Antibacterial effects
Most Useful Review
Oregano oil is known for its antibacterial, antifungal, and anti-inflammatory properties and can be used effectively for chronic skin issues, including cold sores. I have been using this product for a while and find the quality reliable. It aids in detoxifying the body and helps with stubborn acne. I suggest combining it with vitamin C and zinc post-cold for a quicker recovery.
9.5
Immediate relief
Most Useful Review
I have relied on oil of oregano for years, especially for cold sores. At the first sign of illness, I take a few capsules, and any symptoms quickly vanish. This brand has a higher carvacrol dose than others I've tried, which I appreciate. I also use it for my daughter with no ill effects—she takes it at the first sign of being unwell as well.

L Glutamine

10
Effective solution
Most Useful Review
I don’t catch colds any more! I typically take one tablet a day. Having experienced the benefits of glutamine for quite some time, I no longer encounter cold sores. I used to use the powder version, but I find the capsule much easier to consume, so I've been using this format lately.
10
Consistent cold prevention
Most Useful Review
I no longer catch colds. It's truly recommended!

Serrapeptase Enzyme

9.5
Effective for cold sores
Most Useful Review
It has a clear effect on sinusitis and cold sores. I have been taking it for nearly ten years. Allergic rhinitis spread to sinusitis, leading to surgery advice and antibiotic treatment. Since having a child, I have suffered from cold sores... Sinusitis is now perfectly corrected. I strongly recommend taking it on an empty stomach with two cups of water.
9.5
Cyst vanished
Most Useful Review
Excellent! I previously had a cyst in my uterus and after taking one capsule a day for three months, it disappeared. It also helps with colds, as I verified with my daughter—her throat pain stopped within a day.

MSM

9.5
Effective for joints
Most Useful Review
An effective supplement, especially for those into sports or suffering from sore joints. I experienced joint pain post-illness, and while biotin usually helped with hair loss, this time it didn't. However, MSM combined with biotin resolved my hair issues while alleviating my knee and knuckle pain.
9.5
Relieves soreness effectively
Most Useful Review
This product works wonders! I was experiencing considerable soreness from my workouts, and after incorporating MSM into my daily vitamin routine, it helped me immensely. I'm truly pleased with the results!

Vitamin Bs

9.5
Effective sore throat relief
Most Useful Review
I purchased this for myself and I've been pleased with it. Previously, I took it as a picolinate, but this time opted for lozenges and I have no regrets. They have a pleasant taste and soothe my throat effectively. I often experience nausea with zinc in pharmaceutical forms, but these lozenges didn't cause that issue. If you do experience it, avoid taking them on an empty stomach. I notice the effect particularly when I take them at the onset of a sore throat every two hours—they significantly ease my discomfort. Highly recommended!
9.5
Highly recommended
Most Useful Review
An excellent product with superb quality and natural ingredients. It's very helpful during colds, and I would recommend it to everyone.

Turmeric

9.5
Cold sore prevention
Most Useful Review
My entire family continues to drink this, and I haven't had a cold in several years. It's been remarkably effective for us.
9.5
Strengthens during illness
Most Useful Review
I used it regularly during illness and with cold viruses. It was very effective, strengthening my body and helping with inflammation. The packaging is convenient, and there’s a sufficient quantity.

Zinc

7
Zinc and cold sore recovery
Comparative study of serum zinc concentration in recurrent herpes labialis patients and healthy individuals.
Most Relevant Research
We explored the relationship between zinc levels and recurrent herpes labialis (cold sores) through a study involving 43 patients with a history of this condition and 42 healthy individuals. By measuring serum zinc levels using a colorimetric method, we aimed to find out whether these levels differ significantly between both groups and how they relate to the severity and duration of cold sore episodes.

Although we found that serum zinc levels did not significantly differ between the patients and healthy subjects, we observed an interesting correlation regarding recovery times. Specifically, lower serum zinc levels appeared to be linked to longer recovery periods from cold sores. This suggests that zinc might play a role in speeding up recovery, though it was not a significant factor influencing relapse frequency or patient demographics such as age and sex.

Overall, while the study didn’t establish a direct benefit of zinc supplementation, the findings indicate that zinc deficiency might contribute to longer-lasting cold sores. Therefore, we suggest that evaluating zinc levels in patients experiencing recurrent cold sores could be beneficial and that zinc supplementation may be worth considering in treatment protocols.
9.5
Strengthens immunity
Most Useful Review
Helps the immune system and assists in quickly addressing cold sores. The results are excellent, with no side effects.

Echinacea

10
Miraculous immunity boost
Most Useful Review
I have been taking echinacea for 2 and a half years. Since I started taking it regularly, I have not had any viruses, not even cold sores. Before echinacea, I was prone to bronchitis every winter/spring. Now, I'm thrilled to be virus-free. My husband experiences the same results. It has built up my immune system, and I believe everyone should take it!
9.5
Quick recovery noted
Most Useful Review
On a friend's advice, I tried echinacea, particularly as it's vegan. At the first sign of malaise, I take 3-4 capsules daily along with vitamin C, and it positively affects my recovery. However, be cautious if you have allergies; I had no reaction despite my allergy issues.

Polygonum Cuspidatum Complex

10
No cold sores
Most Useful Review
This is fantastic! I used to have cold sores every couple of months. Since I started using this in November 2008, I've not had a single one. My immune system feels stronger than ever.
9.5
Improved cold sores
Most Useful Review
After taking resveratrol for about a week, my cold symptoms have improved significantly, and my runny nose due to weather changes has disappeared. I also feel a boost in physical endurance and mental clarity, which helped me perform better during exams. I was ill recently and took eight tablets in a day, recovering by the next day. It’s remarkable!

Chamomile

8.8
Great for colds
Most Useful Review
A large packet of excellent quality chamomile! It is perfect for tea and soothes at night, helpful for colds. You can also gargle with it or even use it as an ice cube for face application. The generous package means we barely finish it before it expires.
8.8
Fragrant chamomile
Most Useful Review
Excellent, clean, and large chamomile. I brew it for treating colds and add it to herbal tea. Brewed chamomile lasts longer without souring, unlike pharmacy options which spoil quickly.

Chlorophyll

9.5
Increased energy
Most Useful Review
I can’t imagine my life without Greens! This product is outstanding; I experience increased energy, improved skin, and my nails look great. My hair is also growing remarkably. Since starting this in April 2006, I've not caught a cold or flu.
9.5
Healthier lifestyle
Most Useful Review
I can't recall how many years I've been drinking this, but I enjoy it every morning. The ingredients are exceptional; it stands out from other green juices. It's a true superfood that compensates for dietary deficiencies. The flavour is enjoyable, and I've noticed I haven't caught a cold or fallen ill since I started using it. It's essential for my health management, and my family enjoys it too!

Tea Tree

9.5
Strengthens immunity
Most Useful Review
The oil has a robust aroma. I add five drops to my spray oil, and the room fills with a wonderful scent! I also use tea tree oil for oral care, applying it to my toothbrush. It’s an excellent antiseptic that combats colds and boosts the immune system. Highly recommend this oil!
9.5
Effective for acne
Most Useful Review
Wonderful oil! I use it externally for acne, wounds, and insect bites as it effectively disinfects and reduces inflammation. I even add it to shampoo to tackle dandruff after several uses. For colds, I do inhalations and also apply it if I experience a runny nose. I’m very satisfied with this product!

Vitamins

8.8
Cold sore relief
Most Useful Review
I suffer from dry mucous membranes in my throat and nose, which often leads to cold sores and feeling unwell. Initially, I took a small dose, but found that 25,000 to 50,000 IU is effective, especially in winter. This supplement has significantly reduced my colds and improved my overall health.
10
Resolved skin issues
Most Useful Review
I liked the drug very much. It's absolutely effective! I had issues with a lack of vitamin A where my skin on my thighs was covered in bright pink pimples, much like in cold weather. These were noticeable to the touch, resembling "goose bumps". After taking this carotene alongside vitamin E, all my concerns vanished!

Garlic

8.8
Cold sore relief
Most Useful Review
Helps with cold sores. I suffer in the morning, but after taking one capsule at night, my runny nose improves significantly by morning. My heart also feels healthier.
9.5
Cold sore prevention
Most Useful Review
I've relied on Kyolic for years. I haven't caught a cold or flu in ages, potentially due to their antiviral effects. Despite a garlic-rich diet, these capsules are vastly more potent.

Eicosapentaenoic Acid

9.5
No sores experienced
Most Useful Review
I have tried various Omega-3 brands but often suffered from cold sores until now. With this one, there’s no fishy taste, and I've completely forgotten about my worries concerning cold sores. I highly recommend it!
8
Energy improvement
Most Useful Review
Excellent! I absolutely loved this product! There was no discomfort or fishy burps. After a couple of weeks, I noticed an increase in strength and energy. Any cold sores I had seemed to fade away. This omega is in triglyceride form, with capsules that are easy to swallow. I recommend it to everyone!

Dong Quai

9.5
Cold sensitivity addressed
Most Useful Review
For cold protection, I bought this as I have a terrible sensitivity to cold! I believe I’m no longer feeling cold like I used to.
8.8
Improved circulation noted
Most Useful Review
Effective for improving poor circulation! I’m grateful that Angelica acutiloba is available at this price. About two months after starting it, I noticed an improvement in circulation. This winter, I wasn't overly concerned about feeling colder than usual. I’ll continue to take it every winter from now on.

D Mannose

9.5
Successful recovery
Most Useful Review
Cystitis troubled me this year. I tried various remedies, including antibiotics and cranberries, but struggled until I found this supplement on iHerb. Skeptical at first, I began with three capsules twice daily. After three days, symptoms improved drastically! I’m elated to finally be free from the constant discomfort of cold sores.
9.5
Beneficial supplement
Most Useful Review
My mother and I endured years of cystitis, with antibiotics offering only temporary relief and causing side effects. This supplement has been a game-changer, allowing us to avoid pills while forgetting bladder issues altogether. I recommend it for those struggling with cold sores – it has truly changed our lives.

Xylitol

8.8
Improved cold symptoms
Most Useful Review
The quality of this product is excellent, and it comes at an affordable price with perfect packaging. I purchased it for my family, and I have noticed an improvement in their cold symptoms after using it to wash their noses.
8.8
Bacterial growth inhibition
Most Useful Review
I find this product fantastic; I add it to water for nasal washing. Xylitol inhibits bacterial growth, making it particularly useful during the cold season. I'm quite pleased with it!

Oleuropein

9.5
Powerful treatment effect
Most Useful Review
Olive leaf is a potent natural medicine with impressive healing benefits for the immune, cardiovascular, respiratory, digestive, and lymphatic systems. It effectively combats viruses and bacteria, including cold sores, Herpes, E. coli, Salmonella, and Staphylococcus, and can eliminate cold and flu viruses faster than many other medications.
9.5
Helps with infections
Most Useful Review
A natural antiviral agent that appears effective for cold sores, colds, and herpes.

Ubiquinol

8.8
Improved blood circulation
Most Useful Review
I found this small supplement remarkable; after finishing the previous bottle, I've purchased a larger one! At 100mg per tablet, this ubiquinol enhances energy production, promoting a healthier body without fatigue, essential for dieting. I've noted improved blood circulation and much better tolerance to cold since starting. I recommend it, especially for those feeling older stresses.
8
Increased warmth noted
Most Useful Review
It's slightly pricey, but the reduced form seems effective, so I combine it with PQQ. I'm hoping for enhanced mitochondrial activity and anti-aging benefits. Since using it, my basal body temperature has risen a bit, and I've found I don't feel cold even in air-conditioned environments. It truly is a nice benefit.

Vitamin B Complex

9.5
Reduces mouth ulcers
Most Useful Review
This is my first experience with the active vitamin B group, and I noticed that my mouth wounds healed quickly without developing cold sores. I also experienced fewer skin outbreaks before my period. The capsules are a reasonable size, and while they are a bit expensive, I would recommend them.
8.8
Great for fatigue
Most Useful Review
It's superb when I feel really tired. When I have sore lips or my immunity is low, there's nothing better. The quality and ingredients are excellent, and I trust Solgar completely.

Elderberry

9.5
Effective against herpes
Most Useful Review
I’ve been ordering elderberries in capsules for a while now, and our whole family takes them. For the children, I mix the contents into juice. I find it particularly effective against cold sores, making it even better than acyclovir.
9.5
Prevention during epidemics
Most Useful Review
During cold seasons, we use this for prevention as elderberry is an excellent immunomodulator. At the first signs, I take three capsules daily, and within two days, the symptoms vanish. It’s perfect for children and has no side effects, plus it’s a great antioxidant. Highly recommend!

Lutein

9.5
Quick relief
Most Useful Review
WOW! Great product, I had been suffering from tired eyes, but not anymore. A fantastic product I would highly recommend.
8.3
Effective combination
Most Useful Review
For eye health, I pair it with vitamin A. These small softgels are easy to swallow. Previously, long hours on the PC led to sore eyes, but now that discomfort has nearly vanished, suggesting it's working effectively.

Astragalus Root

8.3
Effectively reduces symptoms
Most Useful Review
I take this at the first sign of cold sores. Typically, the symptoms disappear the following day. I’ll continue to purchase it.
8.3
No colds observed
Most Useful Review
Since I began taking Astragalus, I feel my immune system has improved significantly. I haven't had a cold or felt unwell, including cold sores, since using it regularly.

Quercetin

9.5
Effective for allergies
Most Useful Review
A very good remedy for allergies. It effectively helps me manage cold allergies. I take one capsule at the onset of cold weather.
9.5
Life-saving supplement
Most Useful Review
Excellent for colds! It took time to realise the benefits of bromelain combined with quercetin. Whenever I get a cold, this supplement clears fluids from my lungs, helping me cope much better.

Calcium

7
Calcium spirulan may help cold sores
Calcium spirulan derived from Spirulina platensis inhibits herpes simplex virus 1 attachment to human keratinocytes and protects against herpes labialis.
Most Relevant Research
We investigated the potential of calcium spirulan, a compound derived from the microalga Spirulina platensis, to help prevent cold sores caused by the herpes simplex virus type 1 (HSV-1). In a thorough study, we assessed the effectiveness of this sulfated polysaccharide both in laboratory tests and through a practical trial involving people with recurring herpes labialis, also known as cold sores.

Our approach included examining how calcium spirulan affected the virus’s ability to attach to human skin cells. Using various experiments such as plaque reduction assays and analyzing viral proteins, we confirmed that calcium spirulan had significant inhibitory effects on HSV-1. In the practical trial, we compared the effects of topical calcium spirulan treatment against other commonly used antiviral medications among 198 participants, all of whom dealt with repeat cold sore outbreaks.

The results suggest that calcium spirulan could be a valuable option for topical treatment, offering new hope for those who suffer from cold sores. Additionally, our findings indicate that calcium spirulan may also show effectiveness against other herpesviruses. This points to the broader clinical implications of using natural compounds like calcium spirulan in managing viral infections.
9.5
Sensitive enamel restored
Most Useful Review
Proven effective! I took this product to reduce the sensitivity of my enamel, and within a month everything returned to normal; I can now safely eat hot or cold food. There was no need for fluoridation of my teeth. Overall, I highly recommend it.